· Any type of TV Your BELDEN distributor has it! PERMOHM* 8285 . . excellent for color TV. Gives...
94
AN OJIBWAY PUBLICATION Using Your VOM Testing Transistors artikAi_ AA?* oubleshooting with VTVIVIsing
Transcript of · Any type of TV Your BELDEN distributor has it! PERMOHM* 8285 . . excellent for color TV. Gives...
AN OJIBWAYPUBLICATION
Using Your VOM
Testing TransistorsartikAi_
AA?*oubleshooting with VTVIVIsing
Any type of TV
Your BELDEN distributor has it!
PERMOHM* 8285 . . excellent for color TV. Givesstronger, clearer UHF and VHF signals under con-ditions of extreme salt spray, industrial contamina-tion, rain, and snow. 300 Ohm.
WELDOHM 8230.. resists pulling, whipping, twist-ing. Weldohm has two and a half times the flexinglife, and one and a half times the breaking strengthof ordinary 300 ohm lead-in.
(S,
COAXIAL TRANSMISSION LINES-RG/U ANDFOAM RG/U TYPES .. low -loss signal transmissionfor multiple TV installations such as motels.
STANDARD 300 OHM LINE 8225 . . low losses athigh frequencies. Well suited for use with FM re-ceiving antennas.
CELLULINE* 8275 .. installs easily .. no end seal-ing necessary. Has excellent resistance to sun,abrasion, and wind. Delivers strong UHF and VHFsignals. 300 Ohm.
DECORATOR CABLE 8226 .. for interiors .. neutralcolor blends into decor of any room. No dark browncolor to contrast with light carpets or walls. 300Ohm.
Your Belden distributor has a complete line ofBelden TV lead-in cable ... in standard lengths foreasy handling. He also carries microphone andshielded power supply cables; hi-fi, stereo, andphonograph cables; power supply cords; multi -conductor portable cordage; antenna rotor cables;hook-up wire; TV and cheater cords; aluminumground wire ... plus many other related items.
fin, Bum . . . men, . .WIRENIANER FOR INDUSTRY
SINCE 1902 - CHICROO
WELDOHM, PERMOHM, CELLULINE are Belden TrademarksReg. U.S. Pat. Off. *Belden Patents U.S. 2,782,251 and 2,814,666
8-9-3
cord sets and portable cables electrical household cords magnet wire lead wire automotive wire and cable welding cable- - - for more details circle 18 on post card
0 S
te, 0
10,0
E19
th.
BU
ILT
-IN
MO
NO
PO
LEIA
NT
EN
NA
IN M
OD
ELS
(IT
N D
61-1
OR
D61
0-1
CN
AS
SIS
T70
2
L _
_ _
CO
NN
EC
TE
D T
O R
EC
EIV
ER
WE
ND
TE
RM
INA
LS
1480
211
171-
3C
HL
E
1105
1
INF
A T
Elli
a21
.10%
UH
F T
UN
ER
94D
247-
3gu
a;
rc0
00n
19)j
' I-
_ _
210
Lei
f L
INE
--I
I -
it
1170
1/1
01
L70
L70
3
.E-'1
1.31
1111
1 27
L70
227
L70
64
BU
ILT
-IN
DI P
OLE
AN
TE
NN
A IN
MO
DE
LS W
ITH
D61
-2,0
610-
2.1)
61-4
ON
1/6
10-4
CH
AS
SIS
.
CO
NN
EC
TE
I TO
RE
CE
IVE
R
AN
TE
NN
AT
ER
MIN
ALS
.
VH
F T
UN
ER
94E
243-
2
VO
LTA
GE
S A
ND
WA
VE
FO
RM
SL
ine
Vol
tage
: 117
.C
hann
el S
elec
tor
on u
nuse
d ch
anne
l. C
ontr
ast c
on-
trol
ful
ly c
lock
wis
e: a
ll ot
her
cont
rols
cou
nter
cloc
k-w
ise.
Do
not d
istu
rb H
oriz
onta
l Hol
d co
ntro
l.A
nten
na d
isco
nnec
ted
and
term
inal
s sh
orte
d.D
C v
olta
ges
mea
sure
d w
ith V
TV
M b
etw
een
tube
sock
et a
nd c
hass
is, u
nles
s ot
herw
ise
indi
cate
d.V
olta
ges
mar
ked
() w
ill v
ary
wid
ely
with
con
trol
setti
ngs.
Wav
efor
ms
take
n w
ith tr
ansm
itted
sig
nal i
nput
.Fo
r w
avef
orm
s, c
ontr
ols
set f
or n
orm
al p
ictu
re.
Peak
-to
-pe
ak v
olta
ges
may
var
y sl
ight
ly.
B+
Cir
cuit
Bre
aker
: B+
sup
ply
of th
is r
ecei
ver
iseq
uipp
ed w
ith a
ther
mal
type
cir
cuit
brea
ker
havi
ng a
man
ual r
eset
but
ton.
Allo
w a
few
min
-ut
es f
or c
ircu
it br
eake
r to
coo
l off
bef
ore
pres
sing
the
rese
t but
ton.
Hea
ter
Fuse
: A o
ne in
ch le
ngth
of
num
ber
26ga
uge
bare
ann
eale
d co
pper
wir
eis
used
.Fu
sew
ire
is lo
cate
d at
und
ersi
de o
f ch
assi
s.
_70
47s
WIT
511
11C
AM
EL
1 P
OSI
T10
11
I.,'
L70
5E1
0107
6HA
541-
gg11
1p00
014/
L70
5C
CII
1210
6 'f,
jI
till 0
1001
5I
C11
9
001=
40I
I-)
1112173 -
02.
1
500
0
1171
1111
1C
)10
101 2,
40)1
000
11 1;11
1(-1
--)1
C11
1I
1
1105
01
RIF
010
11(1
.51
105
2 10
10 1
3
1/26
C G
8OR
1111
1I/2
6CG
8AT
rZ00
1111
1(1
1103
0702
42.
21L708 1709
11.1
112
1::
1010
J
TI7
11T
1/26
CG
8OR
1/26
CG
8AV
II 0
5007
020
1p0
00
1120
1M
OE
l/26J
V8
5011
01F
AM
P
Sir
V30
31(
.00.
2,0;
_ __
-40
1021
2 12
014
0202
1001
ELE
CT
RO
NIC
TE
CH
NIC
IAN
2_,/-
11=
TP"
CO
MP
LET
E M
AN
UF
AC
TU
RE
RS
' CIR
CU
IT D
IAG
RA
MS
AN
D T
EC
HN
ICA
L IN
FO
RM
AT
ION
FO
R S
EV
EN
NE
W S
ET
S
SC
HE
MA
TIC
NO
TE
SN
umne
rsor
lette
rsin
side
hexa
gons
indi
cate
alig
nmen
t poi
nts.
Fixe
d re
sist
or v
alue
s sh
own
in o
hms
±10
% to
ler-
ance
.1,
1.w
att;
capa
cito
r va
lues
sho
wn
in m
icro
-m
icro
fara
ds -
±20
% u
nles
s ot
herw
ise
spec
ifie
d.
PRE
CIS
ION
WIR
ED
SY
ST
EM
714E
353-
9V
26A
1.11
309E
102
01A
DE
Tta
r
1200
3
9-10
.10
1.11
0,
1.5 5%
_CO
OS
T !:
C20
1
7.;
-1-4
201
VO
LTA
GE
WA
RN
ING
Hig
h A
C v
olta
ges
are
pres
ent a
t ter
min
als
ofw
afer
sw
itoh
5902
and
at t
erm
inal
s of
dia
lesc
ent
pane
l.E
xerc
ise
norm
al h
igh
volta
ge p
reca
utio
ns w
hen
serv
icin
g w
afer
sw
itch
or r
ear
of d
iale
scen
t pan
el.
Puls
ed h
igh
volta
ge is
pre
sent
at c
ap o
f V
406,
and
pin
7 of
V40
4 an
d V
405.
Use
sui
tabl
e te
steq
uipm
ent a
t the
se p
oint
s.
TO
NE
VO
LUM
E12
011
30E
220
1,
T'''
1203
350
2205
.00/
11171--0
-
!ion le
1120
5
ACCT
40011
L1.
211
L 2
0220
7
000
oroa
;10
201
"NT
ON
I
a C
VO
0013
111
-
1201
12._
:110
01IN
EC
$-
:311
r
1011
0111
15 /1
01.1
110
0113
0111
1110
11-I
100
/042
0133
/3
1212
I/2A
L11
$001
0 O
MIT
0300
11L
3021
;
E6E
H7
11.2
5110
1511
123
0011
.25
3301
!i!
7.3
11E
1-0S
C1
1130
0--
*-:fY
211
,5%
1301
1301
{12
.711
21.
10 S
5% I
0303
1210
111
0303
IVA
.001
511F
1121
19
1100
isoi
c7-+
ca44
M13
011N
82A
,
j_ L
802
W12
011
E1
L90
3
rci
sI
1118
-_
0101
5E30
0211
0/11
1128
01OSC
0
1210
1,1
000
RU
N C
HA
NG
ES
3211
1402
2110
315
2100
1011
1'o
r ow
e01
/1(C
/515
0 IW
O51
57(0
III IC
E 1
111
VIII
1111
iffI
llt O
f M
IMS
714E
353-
9
103
021
1
1313
'1
310
T12
0
021
1120
501
1450
2
as te
as15
01
01,1
11),
5 ,
1101
1
M51
009
1-01
1111
01
1
1450
911
1E1
1010
1
Ill
(011
1121
0M
511
SOC
KE
T
3101
1I
(ill
5520
11
010E
1I
5111
01 j
1011
110
2 15
/101
11/1
011-
4 11
1104
013
.11.
5
V51
12P
L1
1141
1;51
3SO
CII
T10
11Si
ll
MO
MA
MIE
VH
F T
UN
ER
V70
1
4701 120
0404
AC
C r
t. V
ol'
I
1If
1
,a4.
SS
0310
Mss
Of
AD
O
1450
:i.71
,1,O
r0
-1-1
1141
1F
1WE
C
1004
1101
111
11
3501
ME
EK
Polo
'
111.
1 01
10/
01 C
LIS
SIS
-000
0102
111T
-tot
ilur
1450
0 2
1 V
III
MI
1011
10
0111
1111
111
1111
1500
1101
I10
1j.
1 O
IL
_tA
cez y
1MM
1101
°IF
AC
C 1
1105
5.11
IF A
CC
0 0
1211
3C5%
1010
01.2
1
0401
,UI
3V
,007
111
CN
D01
1111
_2_
ISY
C10
3 1-
1105
24
5+
WC
240
5 01
0 00
HU
M 0
1515
111
6BU
8N
OIS
E C
ITE
.SY
NC
SE
P
I 201
00A
CC
001
1211
023
-CO
OS
TM
71N
_C40
110
01I
3300
Mr
TR
oda
I1)
.111
11Y
0110
111
IV
1111
93B
5-6
,11
0%11
11,9
EIV
2.r
MO
P
111
100
/R30
8.0
2.P
1301
151.
311
1301
1110
1110
11
IN87
A41
0 O
ET
CR
301
IC01
123
01,
10.
310
%10
%
......
...
1033
i33
3
1,,,,
,,M
rs21
0110
01-,
- 02
01/
26E
W7
I01
01R
oll
113
VE
IT O
SC,,,
,.0
1111
3301
II11
1311
14/1
1131
114/
9402
A
0101
,40,
.001
111
YE
TI
5.51
12 0
26
150
*011
2.T
-
11;t1i
'7;1
024
0710
05%
110.
10%
0411
5115
001-
2791
1110
0Ill
-ft
--,
-=':
f,,,,
,IO
N/ i
II
q711
-7 :1
/264
We
1
61"
I5%
1 1
5%_I
1110
10 1
111
11/
3034
-717
1-31
.11,
.'03
+34
.1I
9000
7303
-27
(305
307
1312
5--
100
rill
C4I
1.1
11/.1
10
1- 1101
VE
RT
-9-
1/26
EW
7vi
ol. m
ooin
g ,
0402
B/0
0412
11"
1426
.011
1110
01[4
1312
1
,002
2gg
gg
i'141
010
120
1122
......
.2.
1110
$120
11-
.001
111
51.1
1,,
5%J.
_ev
er.C
II1
I M
O .I
f,
1071
00 P
k 01
11W
IShi
f11
010
SIST
fl
C
11,1
2,1
1
0010
171.
110
1401
-711
01-
-11
11
./11A
(170
CR
302
1111
1101
C
1410
.100
0.21
001
I:I
844
AD
MIR
AL
TV
Cha
ssis
D61
-1, -
2, -
4D
610-
1, -
2,-4
VII
I
9.10
Apr
il 19
64 1420
120
1110
1
PM
T14
1141
1111
1011
.11C
1 O
N/1
1001
111/
11/1
11-1
0100
/0-1
1115
1/3
0324
,,,,
/711
-00
-0'1
2304
M..1
201
0014
,1B
RIG
HT
NE
SS
0327
3.70
19E
BP
4
0321
1.
4700
C111-0171(
FY
.0p0
,1,1
/1
1230
00
VE
IT..(
1:51
11_
3500
FO
CU
S
1321
2
I1
*121
010
ME
/33
04,
6
111
c.
3
CA
R1
C01
1117
10
1.11
111/
1/1/
4/11
1110
2/01
3
r_ J
149.
,2to
0(3
1 or
es.2
18e
1421
II
Ea
.101
9110
19
---C
17-
"(L
OW
II:2
1'i-i
i"/7
'1-
S-
J.0
0221
1110
%01
11
...IN
F
0111
1011
071
0150
4wV
ER
TtH
EIG
HT
1123
430
HO
LD51
112
'
HO
RIZ
.LO
CK
I L40
111
17
1101
100
011
15
0422
3900
10%
- 1
f.IP
IC
RE
D
III00
2
1101
1 50
1117
ISIS
I
noes
am
m11
0111
1111
1100
11/1
11.9
9.0
RE
SE
TB
UT
TO
N61
504
11(0
0011
R
CR
501
CR
502
I9 nor
RE
CT
IFIE
RR
EC
TIF
IER
1111
11L
-°j
1501
50a2
i.,lif
f:1
0110
270
-- .0
0114
-C
503
Illy
T10
011
2000
311
ur
41...
C50
5041
2504
C
0002
-t10
00/
50 e
l20
01-
3501
135
01
!:1: 04
4.
1042
3
1002
206
0506
1.31
10
121
121
/ itiF
I 7 1
907
MI
NO
Y04
03
1211
1;3
3 -.0
,0%
.05
029
10,3
001
3200
111:
(%1
--01
21O
1711
1
ITO
1413
1.1R 5%
110
Coo
l.0
0171
11
1145
1
111
5%
147
Tc,
,F
ca -
I
0151
1112
I I
0101
1452
1501
0011
1/
6GE
540
112
OST
RIT
150
11
10
V40
4
O 1
050/
010
012
500
1403
11 1.51
MY
002
1111
E1
11.4
IBS
0406
40"1
11
0/29
0171
11 1115
112
0
115
10
1101
1159
I6,
/TO
RC
32
641W
cC
I ri
tiT--
1116
0
1208ir
I5%
011
1133
011
1304
0.10
1411
210.11
"mon.
VE
RT
LIN
11.1
20
1402
MO
IRA
11/.9
1E01
1011
0 L
0 . V
III_
2114
3322
0
0(1,
11.0
0
1ED
2
L40
2
Lia
egoo
104
341
.254
a 0
6AX
300
4P01
1/40
5
I
.99F
.L4
03
Cill
I00I
011
WIN
1110
101/
1110
1111
11
3000
100
31
SAM
11.3
0100
.11
RA
NG
EH
OR
IZ
JJ
CO
PYR
IGH
T19
64 B
YE
LEC
TR
ON
IC T
EC
HN
ICIA
NO
JIB
WA
Y B
UIL
DIN
G.
DU
LUT
H 2
. MIN
NE
SO
TA
Mor
eD
ata
onR
ever
se S
ide
OP
ER
AT
ING
AU
TO
MA
TIC
OF
F -O
N T
IME
RSom
e models are equipped w
ith an automatic O
FF -ON
timer. T
he OFF -O
N tim
er (at side of cabinet) can be set toturn television receiver "O
FF" after a pre -selected time pe-
riod, up to ten hours. The tim
er can also be set to turn re-ceiver "O
N" after a pre -selected tim
e period, up to twelve
hours. Models having an autom
atic OFF -O
N tim
er, are listedin M
odel Identification Chart on front page.
IMPO
RT
AN
T: Push-pull O
N -O
FF switch (at front of set)
must be "O
N" (pulled out) and tim
er must be in "O
N" detent
position for set to operate. Dial light is lit, w
hen set is turned on.
Turning R
eceiver "OF
F" A
utomatically
With television receiver operating, turn tim
er knob counter-clockw
ise until time interval m
arking on knob, is opposite in-dicator pointer. R
eceiver will continue to operate for tim
eperiod indicated on knob, then autom
atically turn itself off.
Turning R
eceiver "ON
" Autom
aticallyFor turning receiver "O
N" autom
atically, set timer knob to
"ON
" detent position. Turn television receiver "O
N" w
ithpush-pull O
N -O
FF switch at front of set. T
une in wanted
channel and set volume control for desired volum
e level. Then,
without disturbing receiver controls, turn tim
er knob clockwise
until interval marking on knob is opposite indicator pointer.
Set will turn off. H
owever, w
hen indicated time interval has
elapsed, television receiver will autom
atically turn itself "ON
".Sound (from
television program), w
ill be heard as indicationthat interval has elapsed and receiver is operating.
MO
DE
L IDE
NT
IFIC
AT
ION
CH
AR
TM
odelC
hassisM
odelC
hassisM
odelC
hassis
¶P9131
061-2§P
9741061-4
# P9151
D61-4
11 UP
91310610-2
§ UP
91410610-4
#UP
9151D
610-4
Tf P
9734061-2
§ P9149
061-4#P
9152061-4
7 UP
91340610-2
§ UP
91490610-4
#UP
97520610-4
7 P9739
061-21T
9728D
61-1
T U
P9739
D610-2
TU
91280610-1
§ Model has dial
light, tone control, earphone jack, carryingdipole antenna.
# Model has dial
light, tone control, earphone jack, carryingand built-in dipole antenna.M
odel hasdial
light,carrying handle, and built-in
dipolehave tone control or earphone jack.M
odel has built-in monopole antenna. D
oes not have dialcarrying handle or earphone jack.
1UH
F A
NT
EN
NA
TE
RM
INA
LS
VH
F A
NT
EN
NA
TE
RM
INA
LS
tUH
F T
UN
ER
:PLU
G M
512
PR
EC
ISIO
N W
IRE
DS
YS
TE
M 714E
353-9
VE
RT
ICA
LB
RIG
HT
NE
SS4
CO
NT
RA
ST
VE
RT
ICA
L LINE
AR
ITY
HE
IGH
TT
ocorrect im
proper pictureheight
orvertical
linearity,alternately
adjust HE
IGH
T and V
ER
TU
N
AG
C C
ON
TR
OL
HO
RIZ
ON
TA
L LOC
K
handle and built-in
handle, timer clock
antenna.D
oes not
light, tone control,
View
of Knob on
OF
F -O
N T
imer.
VH
F C
HA
NN
EL
TH
RO
UG
H
AD
MIR
AL
TV
Chassis
D61-1, -2, -4
D610-1, -2, -4
ELE
CT
RO
NIC
TE
CH
NIC
IAN
TE
N/F
AI
844
SLU
G A
CC
ES
SIB
LEH
OLE
IN V
HF
TU
NE
RF
ront View
of Escutcheon, C
hannelS
elector and Fine T
uningK
nobs Rem
oved.
PU
SH
-PU
LL OF
F -O
NS
WIT
CH
AN
D V
OLU
ME
.FO
CU
S A
DJU
ST
ME
NT
HO
RIZ
ON
TA
L RA
NG
E
April 1964
DE
FLE
CT
ION
YO
KE
YO
KE
RE
TA
ININ
G C
LAM
PT
o correct picture tilt, loosen screw on
yoke retaining clomp.
Rotate yoke
untilpicture
isstraight.
Tighten
screw.
PIC
TU
RE
CE
NT
ER
ING
TA
RS
Move tabs closer together or farther
oport to center picture.
AC
INT
ER
LOC
KS
OC
KE
T
CIR
CU
IT B
RE
AK
ER
RE
SE
T B
UT
TO
N
AD
JUS
TM
EN
T IN
FO
RM
AT
ION
GIV
EN
ON
OT
HE
R P
AG
ES
.
t ON
LY IN
VH
F -U
HF
CH
AS
SIS
.I O
NLY
IN D
61-4 & D
610-4 CH
AS
SIS
.
Rear V
iew of C
hassis Show
ing Adjustm
ent Locations (UH
F T
uner in D610-1, -2 and -4 C
hassis).
IP,
P--
845G
EN
ER
AL
EL
EC
TR
ICR
adioM
odels 11R31,
-33, 7225A,
-35A and -36A
sz;PI
H
Ii
ELE
CT
RO
NIC
TE
CH
NIC
IAN
TT
EI=
L-5'
CO
MP
LET
E M
AN
UF
AC
TU
RE
R S
' CIR
CU
IT D
IAG
RA
MS
AN
D T
EC
HN
ICA
L INF
OR
MA
TIO
N F
OR
SE
VE
N N
EW
SE
TS
/
.H12
2.I
iy
IP
Ie
I.
21
-0I-
-HI
aid
April 1964
8_1113 I
g1Ygw
-L
8II"
-1I14,,
I
_
I
\i
1.1S110 't- -
- - - --fo
It
E,
0000;
0000 00
I.
/11!it
IIN
e
I
More D
ata on Reverse S
ideC
OP
YR
IGH
T 1964 B
Y E
LEC
TR
ON
IC T
EC
HN
ICIA
NO
JIBW
FY
BU
ILDIN
G, D
ULU
TH
2. MIN
NE
SO
TA
C 5
034
MF
.50
V (
218
V05
0H08
)
RIG
HT
NO
TE
: AT
ER
MIN
AL
NE
AR
ES
T C
OLO
R D
OT
MIM
III
Mt
C T
IA11
5157
01 C
AS
E
NT
AI T
IA11
5410
1 10
1001
1V
IEW
6 6
T"
uD
ON
.
4C
OLO
R
F,L3
00,3
01,3
02F
' 40
110*
YIIM
T M
O
CO
LOR
Dor
.
100.
401.
1102
1103
,110
4
I4
o o
oT
200
, 120
1,12
02,1
203
12 -
r1,-
LEF
T
C 5
004
MF
50V
(71
8V05
0110
8)
ELE
CT
RO
NIC
TE
CH
NIC
IAN
4171
-C
81--
r-11
1112
0202
ION
A
122
R
L
1200
LUCCOMM(CTIONS
6tI
OA
1102
151
CII5
1ST
IFIN
101
MC
IF A
MP
44 1
120
2
.1,
200
C11
1 I
220
Vjt
1.10
3R
14
41R
"ill:
-2T
4". :
: 4^
I
1&51
<I
f
:1i
! 153
E
I2
2I
OD
1.l.
.414
1
L.._
_2rs
!
.4 0111
0112
NIA
001
CI
-AM
P
I13
44
C
2
C4
WV
200
C24
0A
M U
TA
N C
AN
FM
171
11
1.91
C K
4
2100
TN
II
10.1
0CIF
AM
P M
pR
1.70
4". 2
133
or1
2
5
I I, ;
211
2^A
A,
3
SE
CT
ION
I
FM
RA
DIO
270
1.7A
.
12.1
4F
O
-.
J
1210
2101
23
1.11
1
.2
LJ
2t0,
-
CO
MP
LET
E M
AN
UF
AC
TU
RE
RS
' CIR
CU
IT D
IAG
RA
MS
AN
D T
EC
HN
ICA
L IN
FO
RM
AT
ION
FO
R S
EV
EN
NE
W S
ET
S
12
I F10
0 fIZ
IP A
N
10.1
MC
IF A
MP
1125
-
0413
11e
20^
II 1
1::1
1
.12'
i-I
121
00 2.24
- 61
21-
220
10.2
1
C12
611
23
t 112122
8
2Ill
6125
1112
102
Apr
il 19
64
4IF
4111
1116
42N
DA
II
,220
ti3
3
s
rio
.TM
CIF
r,r
44 M
..4:
Mile
1
0
.150 ov
.17,
_ II
:M.,
I
0121
1
"E
Ail
$
c01:
11
LIQ
Zr
=2-
3
-111
vs-4
,I
v --
LiI
QC
.0r-
1261
1 J
AF
C
9110
1
14Ir
1
1/1
210
-1/2
0411
1_ A
NIF
T41
2.1
-
SE
C IO
N 2
AM
RA
DIO
AF
C
0201
DO
NA
AM
1,44
a
1142
1m
.m,
F13
10 in
:00
Anne
of
-L-
MM
12
8202
AI1
05C
NO
TIO
N V
IM
2
5-.7
704
I
1301
ISIT
AN
455
AC
CII
-j T10
221
80 IF
AM
455K
0121 ,2
1:R
in
S
-02
01
;02
1203
3RD
IF
-005
AN
ITT
i45
54C
Tv
0132
003
z4-
846
WE
ST
ING
-H
OU
SE
Rad
io C
hass
isV
-252
8-3
Mod
el H
883
N29
RA
TIO 10
.1 M
C
---
)-'1
1 0
018
ICI3
3.1. T
106 11
29
1-, 0
1 1
101
17T
--10
01(1
112
11.0
.01
21_1
1204
2 T
1
0301 02
91
12015
6210
1000
y.00
5ill
/165
;fie
f
'710244
1209
.. C
213
.02
KK
KI-
KO
MI
IA
1.30
0
ST
302
--4=
1KI c
NF
11 1
30C
03
"'00
0C
301
/20
pro
278
INT
L301
311
I11
A
cTos
1310
C30
9.1!
2 31
E2
+12
11
SE
C IO
N 3
FM
MU
LTIP
LEX
41
FM
0E
1 O
UT
PU
T
125L
11
4ji
fiI1
U11
I4
I"-
5+13
2210
4i c
OD
IC
-1
1.30
3R
UC
05C
,
(LO
TIO
NIF
I4
3
C31
7
3115
0323
371
ULU
12
FIL
TE
R 1
1ID
E E
MP
RA
SIS
.311
4 30
0
L _
_
MI
LEF
T C
HA
N21
01
OU
T
_
1326
.,I2
vm
iT
O S
O 4
000
101
.614
=,
2 30
0
'FIL
TE
R i
ml
2 30
1
I0-F
mpm
90.3
642
AK
IO C
HA
N
3 1
i 301
*, -
(MIT
2
IC
319
IIM
F
v.,.
1,
TO
SW400e
Intl
101
1132
1
.3
I
0311
1311
I NO
R
AM
DE
TF
ll E
MT
OU
T
004
1131
6.11
R
0131
1
,6
1010
3
I. A
LL C
AP
AC
ITA
NC
E V
ALU
ES
LE
SS
TH
AI L
O 4
10IN
10;
SU
LKS
CR
EA
TE
R T
HA
N 1
0 41
0 IN
IFIP
ICO
FA
NA
DS
LR
ES
IST
AN
CE
VA
LUE
S A
RE
IN O
NN
$11
2 1
UN
LES
SO
TH
ER
WIS
ES
PE
CIF
IED
.
2 02
VO
LTA
GE
S A
RE
ME
AS
UR
ED
FR
OM
PO
INT
S IN
DIC
AT
ED
TO
CIN
Cui
l CR
OU
ND
NO
SIC
NA
L IN
PU
T, 0
5110
A V
1411
,134
TIV
IEL
LIN
E V
OLT
AC
E S
ET
AT
120
400.
LO
UD
NE
SS
CIN
EM
AA
TT
IMM
CA
P A
T M
AX
IMU
M.
ALL
RE
FE
RD
ICE
S T
O L
EF
T 1
RIC
HT
LA
E 4
5 01
(0(0
'AC
M 0
1101
11 O
F 5
E1
4. R
EA
R 5
6011
0115
Of C
0N2L
0L5I
TA
I3II5
T 2
1101
1 S
IAM
)A
RE
CC
??CHANNEL.
S. A
RIU
S O
N C
ON
TR
OLS
INO
KA
TE
Cl R
OT
AT
ION
1001
1110
1 01
1007
Em
u 51
101
ow
LIM
IKK
INE
D M
IMS
OK
& 0
104
UM
IN 1
112
AN
Pom
o.11
0312
040(
5 O
F C
RS
I 11
1119
1411
16 A
RE
LIM
O11
11 V
OA
DIC
CN
IEC
TE
D F
M T
IE P
C M
O.
IISC
ON
NE
CT
INT
IM F
I A
U 1
111(
1 IS
NIC
TIT
. FR
AN
T
1011
AC
FM
DIA
L LI
CH
T
AM
all
LiC
HT
II"
LUT
EI
if -N
lI
SI 4
11
4441irt
Cia
tlIE
NC
EO
WLE
T
5114
00C
1 K
AU
1
1110
1
27Ø
0
*234
1400
TA
F11
01
1101
4211
1U
176
11
RO
I2204
sre
1400 22
I
4411
S11
400A
FR
ON
TLE
FT
CLA
N.
MO
N C
OM
P
1113
2234
OT
T C
HA
N M
ELT
5114
000,
C, 9
1EN
ED
140
851
1011
EN
IR C
OO
4091
101
AN
)50
400
A. L
C, 5
E01
E10
BO
AM
fg IA
ULI
412
C10
1
Nr
1115
{ 0
4001
OR
550
0 I
AM
OT
T 1
1110 14
022
1
_L
Mn
330
442
MI D
IAN
MIS
TIMF
-.M
I LE
FT
014
N 0
41
.IA 1
16X
1 01
4110
01C
441
coz
103
110
NI
PR
E A
MP
1 54
"Pt
SIr
0403
RO
MF
1410
220
- N
CO
C12
1M
OW
.
1401
3301
.25
.10 PI c
aLl
""15
101E
AM
P
419
Rat
IICH
T14
71
1403
5-4,
8140
111E
11
8 44
4
0400
VO
LT
1112
11
044
0C
VO
F44
5AC
OIF
C44
6A71
413
04 00(1
0113
1N
IA 1
401(
1
LAni
k---
CO
MP
RIC
HE
CN
N N
ON
220411
1
m:7
/4
410
Im*1
1'zt
TN
=S
EC
TIO
N 4
LUC
ED
OE
AM
PLI
FIE
R A
PO
NT
AK
INIC
IEN
T13
5151
01S
UP
PLY
TO
O P
IE -
AM
!
4204
1418
DO
3.14
1423
L
1114
TA
RN
?11
0011
0) 1426
251
BA
LAN
CE
CO
NT
RO
L
WA
MO
E=
V 2
528-
3
1428
1432
1.71
1$
430
30
ikft.
PO
E -
DR
IVE
R
1431
411
iC)4
4"1
C15
4
1141
35A
_1.3
508
C41
0
.15
4I C
1,31
-IM
F
1113
6
.110
1045
*
1117
1111
44 col
1435
1-
MIL
E00
1110
1.
032
15
220
04
1439 Ill 1444
101
1.04
06y
PR
E-
0111
90
331
14":
3_33
014310
1144
10.2
DIN
ER
531 14
52
511
0104 .01
1453
031
340
4110
41F
23104
.02
270
01R
0LE
TR
AN
SO
RO
.
1140
47
1414
DR
YE
R
IxT
RA
NS
EO
1.14
0.0
01
610 1/51
LT
180
TI
0
0410
-A
UD
IO O
W.
1116
1
24
C11
1
1200
110
'LW
0420
133
0411
moo
OU
T.
MU
04)
033
0413
AU
DIO
NT
.
LEF
T
CU
INIE
L
5114
4E1
=M
EM
MIN
T
MU
M
1411
UR
INA
L
ST
EN
CIP
OO
NIE
S
CO
PY
RIG
HT
196
4 B
Y E
LEC
TR
ON
IC T
EC
HN
ICIA
NO
JIB
WA
Y B
UIL
DIN
G. D
ULU
TH
2. M
INN
ES
OT
A
ELE
CT
RO
NIC
TE
CH
NIC
IAN
AD
JUS
T T
-20I (BO
TT
OM
SLU
G)
TO
47.25 MC
.
847A
IRLIN
ET
V C
hassis10-116-254 and-254UM
odels GT
C-
3914A, -44A
,-54A
, GT
C-
4914A, -44A
and -54A
L-3
MY
-4
1.T 61/0;51
L
R. F
.A
MP
LIFIE
R 11311.6
vOL T
S
0.LES
0182705
L -P64
TR
-402
,
Tiji=L-A1
CO
MP
LET
E M
AN
UF
AC
TU
RE
RS
' CIR
CU
IT D
IAG
RA
MS
AN
D T
EC
HN
ICA
L INF
OR
MA
TIO
N rO
R S
EV
EN
NE
W S
ET
S
1
April 1964
- VO
LTA
GE
ME
AS
UR
EM
EN
T C
ON
DIT
ION
S -
1 - LINE
VO
LTA
GE
II7VO
LTS
A.C
.,60 CY
CLE
S.
2- D.C
. VO
LTA
GE
S M
EA
SU
RE
D W
ITH
A V
:TV
IA F
RO
M C
HA
SS
IS T
O S
OC
KE
T T
ER
MIN
ALS
.3- V
OLT
AG
E R
EA
DIN
GS
TA
KE
N W
ITH
NO
RM
AL S
IGN
AL IN
PU
T,U
SIN
G A
V.T
.V.M
.4- R
AN
GE
CO
NT
RO
L SE
T F
ULLY
CO
UN
TE
R C
LOC
KW
ISE
, AN
D A
LL OT
HE
R C
ON
TR
OLS
SE
T F
OR
NO
RM
AL O
PE
RA
TIO
N.
V H
FC
HA
NN
EL S
TR
IP
11-1.14
1
vT-2
6CG
BA
R.F
MIX
ER
TU
NE
R T
A -116
C-15
,,r6 -11cLT
A.s
2-1115
ME
M!
rstioftM
inimN
iumA
N
NO
06414EUSE
ZIN
N
RE
0
(mA
rc'jc.1"-loe)
VT
-4055U
4G B
LOW
VO
LTA
GE
RE
CT
IFIE
R
L
C -I
R.F
. T
ES
TV
T -20I
PO
INT
6826C
-Zoi
1.1 F1000
AM
PLIF
IER
150_LL
2
R-201.714
4202
47,77<4-202
4-2o2"C-203
66554R
OS
C.
21000
41.25NC
.TR
AP
BO
TT
OM
SLU
GV
T -202
6026
F-----101_1
AM
PLIF
IER
2.. I F
4-204504
R-207
C-204
2.2 WE
.1.0
.47P
ILOT
BU
LB
11
2
146V
130V
IJ
I,V
T -204
26E88
SO
UN
DF
AM
PLIF
IER
030
R-10$
J47 25 M
C T
RA
PT
OP
SLU
G
1.42V1450
M-213
ale
1:-212 - 2.20710
T ""
;A:
ego
L
R-216470
100
/V
T -203
6C136A
340.1.0A
MP
LIFIE
RszvOV
OV
2
L-7 TU
NE
R M
IXE
R C
OIL A
ND
2ND
. I.F.(B
OT
TO
M S
LUG
)A
DJU
ST
ED
TO
LOW
SID
E O
F C
UR
VE
AD
JUS
T 1-203 O
UT
PU
T1.F
TO
MIN
IMIZ
E V
ALLE
Y
AD
JUS
T 1-202 (T
OP
SLU
G)
TO
47.2546.
.45.75 MC
AD
JUS
T T
-201 1ST
I.F.(T
OP
SILO
TO
HIG
H S
IDE
OF
CU
RV
E
rtA
DJU
ST
L -I50 INP
UT
I.F.
TO
RE
MO
VE
TILT
LO -525
C-209
5000IS
O4,217
C./.1,0
I w-2
V.
rin 11°'3 ry
1-1021000
74- 75nd
< R
-2,5t 470
I
1 w -s
1
4.1
IOU
-31
IFAT
II
-.
7875,v
VT
-I016D
T6
FM
-SO
UN
DD
ET
EC
TO
R
N7V
V.
R-219
3900
W-4 1
40V30,w
-io I
f\\/\,\I
I V787570
300V
LW -S
I
Rr 07
V.1
830.30 Nw
-
35V,
7475,
R-10.500
Yea caN
reoL
C -112
.01f.
8-109
fY
C-1111'201:
TO
NE
CO
NT
RO
L:
VT
-2042 6E
813V
IDE
OA
MP
LIFIE
R
150v
26- V
VT
-IO2
6AS
5A
UD
IOO
UT
PU
T
M-11350
4 $110
52
SY
NC
. SE
PA
RA
TO
RA
G.C
. NO
ISE
GA
TE
M-206
1-2053 M
EG
10 W..
5%4
FC
-151215V
-=-
21100
.----1:-7-42Tr=
.7eC
.206
T_
toorroiO
NF
O.
350 V$50V
-1-
F-13
SL
OWIO
W
8.1.
"m"nE
L-192Y
OK
E
.14-327220
11
C-309
.022 L11. 22
...501$111EC
TS
RT
_O:2
PIN
OF
PIC
TU
RE
TU
BE
C-308
1002208
2KV
17, -301
01
C-310
"121'I 3/
C-311
.0471A01-31220
,
ca 1
3500R
-325
IOU
-s
2250T
-336E
M 5
-11--4V
ER
TIC
AL
c -so -rO
UT
PU
Ttuf.
2350(522_,013
sv
c-1155i
010
uf5ovI
4-320
11t
C-3011
.042 utR
-3I6220IO
U
R-319500
VE
RT
. LIN
1,2 vT-302
6CG
7/6F07
VE
RT
ICA
LO
SC
ILLAT
OR
R 317
4204
R-316
2.5 KE
WH
EIG
HT
100
1W-4
11350
R-314
56
-1)C-305
.0470.
w-6
14-3152005
VC
RT
NO
LO
M-302
'°4%
61056K
.*."
B 304
RA
NG
E
146
1951/
70v
1353
00-,Suf01-1-
2-5121
1W-12 I
MA
RK
ER
VID
EO
CA
RR
IER
I w -
I
494
C-113
0102(1.05v)2V
11 .1
C-114
40 WV
11-$1.A."-
2W 4-
4.Vt0
2000
200V
W-13 1
T-101
Is- 4.5 MC
.
1W-71
1375V7875,
TE
ST
PO
INT
IL
1
112,14-230R
5 231100
BR
IGH
TN
ES
S
030,
560
VA
LLEY
NO
T T
O E
XC
EE
D30' T
OT
AL A
MP
LITU
DE
MA
RK
ER
SO
UN
D C
AR
RIE
R
C-II6
VT
-205272P
4P
ICT
UR
ET
UB
E
20
S-138
136
2600
e)5v
WV
155v
-so
01u127130
50
a- M
-301
I w -7
C-303
R307
400./ N
EG
.
IW-b
4-2321204
T-401
C-405
1W -I I
I
.2er56
3146C
G7/6F
07H
OR
IZO
NT
AL
VT
-40I
OS
CILLA
TO
R
11
1i 4
R-403 LI 1-1
,1416.4700
-.T
R-404
15005%
212
c -oe)9. -
ea:R
V
1500
-408
7V
VT
-402601:16B
HO
RIZ
ON
TA
LO
UT
PU
T
2-4114-412
4700100
,
C-40.-
650R
-4065.
0-1\ AN
---014-40$
15
C 407 T
iC
-410 TC
.06,1,
"071.5S
G
470
117
-35,1
C-412
.0010?
1205ex
W-12
150V
11-131243W
.047
34CO
NN
EC
T T
01,2 OR
37 F
OR
RE
ST
FO
CU
S
5000
R-233
220
R-234
4704
VT
-404
163483H
IGH
VO
LTA
GE
RE
CT
IFIE
R
e7e0v
VT
-4036A
U4C
ITA
DA
MP
ER
R4141.211
330C
-414C
120'24V
2605
R-415
CiV
35
C-13
027 ofR
-161504
2O
RE
IC -C
707I11"
42042204
NO
TE
* RE
FE
R T
O Y
OK
E P
LUG
AN
D S
OC
KE
T P
IN N
UM
BE
RS
CO
PY
RIG
HT
1964 BY
ELE
CT
RO
NIC
TE
CH
NIC
IAN
OJIB
WA
Y B
UILD
ING
. DU
LUT
H 2, M
INN
ES
OT
AM
ore Data on O
pposite Page
CH
AS
SIS
NO
.10
-11
6-2
54I0
-116
-254
U
TU
NE
RT
A -
116
FIN
ET
UN
ING
TU
NE
R T
A
0
VT
-1
vT-2
r6.
5R
EG
IZA
ER
oNT
I(R
EA
R)
MN
I
DE
UT
E E
QU
IPP
ED
,
VE
RT
HO
LD-3
15 GR
OU
ND
BR
AID
PH
OT
OC
ELL
"B.
uNE
ST
RD
.31
,355
1,13
111(
4-3
UH
F IN
PU
T31
0390
D-0
3
RE
SIS
TO
R35
1( OuT
puT
SH
IELD
ED
CA
W co.R
oL
436E
ultL
y
5UG
BLO
N v
oLT
RE
CT
AU
DIO
OU
TP
UT
TR
AN
SF
OR
ME
R
402
TR
AN
SF
oRM
ER
t5C
5
MD
WB
RIG
HT
NE
SS
TO
NE
R-2
31R
-112
K-5
6(F
INE
TU
NIN
GM
OB
0,55
0P
ILO
T B
ULB
CO
NT
RA
.P
B-1
Km
@
1571
6626
66Z
6
PU
54,8
6315
5
C -
4204
,B
IF
iNT
ER
ST
AG
EI F
INT
ER
ST
AG
EB
OT
TO
MT
RA
PT
OP
SLU
GA
P47
25 M
c T
RA
P
6826
,:r
EiL
OU
TP
UT
2D20
T-2
03
vER
T O
SC
SY
NC
INV
ER
TE
R
{7-2
,34}
. -S
OU
ND
TR
AP
(T
OP
SLU
G)
)sou
ND
TA
KE
OF
F (
BO
TT
OM
SLU
G)
i--
-,1
1- ,F
3C,
INrE
rS76
" :IT
SE
PO
NE
2'v
° S
'°v
6DT
6-
NA
G C
'0nr
''E
N s
oUN
DC
MA
DR
AT
UR
EN
OIS
E G
AT
E
F,,,
,uD
ET
EcT
oRC
OL
YO
KE
RE
TA
INE
RS
T -
58
ot40
7
NESS
-0
rni
,
Li
76z7
Nvi
1142
,51
-319
,.-
I_-;
'-
PIC
TU
RE
V0T
OD
E'F
T -
TT
7771
4_
T
*F"
PIC
TU
RE
TU
BE
TY
PE
27
ZP
4
0 .
N
N
DE
FLE
CT
ION
YO
KE
L -
I92
7-20
2
Ts
-14.
3A
NT
EN
NA
TF
Rio
NA
M S
TR
IP
SH
IELD
ED
CA
BLE
AS
SE
MB
LY
OH
729
E C
A@
RA
TIo
NK
NO
B
CE
NT
ER
ING
RIN
G
AQ
UA
DA
GS
PR
ING
6 C
G7/
6FQ
7G
EM
S
6C 8
6A
FU
SE
TY
PE
" P
i'3/
4 A
MP
Apr
il 19
64
u. T
UN
ER
MO
UN
TIN
G B
RA
CK
ET
6007
/6F
C)7
I
TP
UT
RE
5
D -
40I
EL
DIO
DE
F C
0063
6CG
7/6F
07N
OR
M O
UT
PU
TH
OR
12 O
SC
.
=A
z
@N
27
AM
P,;7
-,-
NDPII
tIg2
CLP
-)0;
1 vE
RT
IM3U
TP
u
1=1
IBS
141
---;
;;LT
RE
CT
IFIE
R
T -
40I
fOR
12D
NT
AL
OU
TP
UT
SP
K -
138
SP
K-I
37
AIR
LIN
ET
V C
hass
is 1
0-11
6-25
4an
d -2
540
Mod
els
GT
C-3
914A
,-4
4A-5
4A, G
TC
4914
A, -
44A
-54
A
ELE
CT
RO
NIC
TE
CH
NIC
IAN
sir/
FA
AC
847
Mor
e D
ata
on O
ppos
ite P
age
ELE
CT
RO
NIC
TE
CH
NIC
IAN
7771
_7=
EF
CO
MP
LET
E M
AN
UF
AC
TU
RE
RS
' CIR
CU
IT D
IAG
RA
MS
AN
U T
EC
HN
ICA
L IN
FO
RM
AT
ION
FO
R S
EV
EN
NE
W S
ET
S
OU
TP
UT
TE
RM
INA
L B
OA
RD
(TO
SP
EA
KE
RS
)®
-'-',
268Q
5
RIG
HT
CH
AN
.,0A
_r.,
OU
TP
UT
"V 1
\J1
PH
ON
O12
AX
7IN
PU
TA
MP
T2-
TO
PLE
FT
CH
AN
.
T3
-BO
TT
OM
RIG
HT
CH
AN
.
(2-O
UT
PU
T
848
RC
AR
ecor
d P
laye
rR
P -
21 5
-C1
Apr
il 19
64
115
V ,6
0,N
, PO
WE
R S
UP
PLY
TR
AN
SF
OR
ME
RS
OT
OR S
I
1-M
R12
A/B
LOU
DN
ES
S L
4
RIB
2 M
EG
BA
SS
R2I
82043
IIBOK
UM
EG
R1A
2 M
EG
BA
SS
R2
B50
00T
RE
BLE
IR
22
IIR
ON
R2A
500K
TR
EB
LE
P26
1J
2-F
RN
RE
D
BLK
151
IS O
N C
HO
WM
OT
OR
BO
AR
D)
120
V C
606
,P
OW
ER
SU
PP
LY
C14
I
100
0
VIM
I/2-1
2AX
7LE
FT
AX
NE
L6
1600
VIA
1/2-
12A
X7
RIG
HT
CH
AN
NE
LA
MP
LIF
IER
TI
TE
L /G
RN
BLK
/RE
D
206
V 3
6E10
5LE
FT
CH
AN
.O
UT
PU
T
R1A
/BB
AS
S CS
.047
PC
I
.047
R2
A/B
TR
EB
LE
290
V@
100
MA
6605
LEF
T C
HA
NN
EL
OU
TP
UT
3
MIS MEG
BAL
V2
6805
6B05
275
J2P
HO
NO
PO
WE
R
275
V.
260
V
74 v C
ICS
O M
ED
--N
5./A
-11
1.1.
4
2W
74 V
.
5
RU
NT
CH
AN
NE
LO
UT
PU
T
R13
BA
LAN
CE
(MU 30
0 /)
.R
ED
4On.
)
FIN
ISH
T2
(OU
TS
IDE
ST
AR
T(I
NS
IDE
)R
739
002W R
I35
002W T
3(
1SN
TA
RD
TE
40n
-R
E w
300n
BLU
FIN
ISH
(OU
TS
IDE
)
SS
YF
D=
YEL
5.0
V60
'11
RE
D /G
RN
RE
D/ T
EL
4.
TOTAL
RE
D
V5Y
3GT
RE
CT
IFIE
R819
100
6
V3
V2
VI
6605
6005
I2A
X1
.%
OR
S5
6.3
V-
BO
O,
BLI
I/OR
N
.44
S
CIS
022
CIA
ao
P3
-2A
J3 -
F1.
0 in
< .6
"XS
"C
ON
E'
I
_LI
FT
-M
IT S
PE
AK
ER
CA
BIN
ET
--
J4 -
F
K 1
000
ALL
RE
SIS
TA
NC
EV
ALU
ES
IN O
HM
SA
LL C
AP
AC
ITA
NC
E V
ALU
ES
LE
SS
TH
AN
1.0
IN M
FV
ALU
ES
AB
OV
E1.
0IN
MIF
F E
XC
EP
T A
S N
OT
ED
VO
LTA
GE
S M
EttS
UR
ED
TO
CH
AS
SIS
GR
OU
ND
WIT
H'V
OLT
OH
MY
ST
SH
OU
LD H
OLD
WIT
HIN
2 2
0 %
WIT
H12
0 0
LIN
E. V
OLU
ME
CO
NT
RO
L A
T M
INIM
UM
AN
DN
O S
IGN
AL
6119
DU
O -
CO
NE
.
N74
4C
HA
NN
EL
!ELE
CT
OR
KN
OB
K-7
43-1
)O
N-O
FF
/vO
LUM
OK
NO
B
K 7
10E
NF
TU
NIN
GN
OS
CO
PY
RIG
HT
1964
BY
ELE
CT
RO
NIC
TE
CH
NIC
IAN
OJI
BW
AY
BU
ILD
ING
. DU
LUT
H 2
. MIN
NE
SO
TA
ELE
CT
RO
NIC
TE
CH
NIC
IAN
849M
AG
NA
VO
XT
V C
hassis40-01-11, -01-21,-05-11, -01-21,-06-21 and-08-21
April 1964
46-011 CO
Torlit 01.01214.1
CO
MP
LET
E M
AN
UF
AC
TU
RE
R 5' C
IRC
UIT
DIA
GR
AM
SA
ND
TE
CH
NIC
AL IN
FO
RM
AT
ION
FO
R S
EV
EN
NE
W S
ET
S
....0011101
114a45.
45090011
R13021rFE
RT
Ogg
11550R
N7
40 -O. -II
OM
ITT
ED
NO
E 0%
MO
E 10%
0,4100000
=7.1
OM
ITT
ED
=T
Mu m
a a%40-06-21
101011.34.10.21R
OW
RE
DM
OM
10%M
K 10%
.0611O
NIT
TE
D-,'
000100O
MIT
TO
1.1111/4 10%
40-06-11N
W=
3300 10%330 10%
.066O
MIT
TE
D0."°"
-,ourrrn
KIN
Klo.
5400 .%40-04-11
Raeui0t9
3310 10%330 294
.auw
orm040010f1
mam
aescs
le.5600 10%
40-041-11R
M.=
3100 0%M
K 1015
.064O
NIT
TID
340010-101111160
120K 0%
5400 10%
60-001100111D
1100 10%19011 0%
.01N
OW
=340020-1
00117101=
IMO
it NC
O 10%
40-01-21404.1010
11100 0%1011
10%.011111
00171103140029-1
OM
ITT
ED
00117E0
1.E1. 10.
4o-ol 0-0.T
UN
ER
VW
TU
NE
R
(73)
.0
.10e001
0111 .1101
O
O
v. INIE
N1111 PO
IET
ION
1invouTR
V1
v14/T
Y=
460 InTs =
PA=
W L
ow Parr=
,
50.30.
nL
0801E
SJ30$
-1-4v-P
UMIf
SO,
A
A11-r?eV
P
00 in= 110
601.,157501,
-030vP-p
SOH
.
MIK
P
3730,
____t_511M
-P.,
-t.1190-4
...,A..........1
1500VP-P
r \._../ - \._}_1
.17K
ivri..1..F
..,_i.
L_
04......L-8-
60.......-.-
40.15150.
15/50,/,60,
15750,
IJ
a1
M5
=N
O IF
V301
6.44
030501100G
MT
04500
13001,
TO
R I
jr,ev
3
5011110D
ET
EC
TO
R
0302R
ill I6076
61111E0
2 5v
OFD
v
NO
V
ar°11304
Z.
605
15
L4,91t. -
030401112
4?130
C310
1/00
0.13030 9304
540$0
,110,1007 05
0507100R
3036150
IS 10%
4310IM
O30 0%
9v
0J3011
acC
311002100I K
V 0
009
1830.E
m31/0%
IIL
J3074305
J3110J304
4310
201AA
il
r60060
50120 cSO
UR
CE
BOY
80057Yro
,0.
420,
1ST V
IOE
0IF A
MP
V201
Mil
110v
C201
L202
22010%
0202
)(ill::
,400
I 4.71L
EC
H")%
74I zs lc .__if
_ _Joy.C
205M
O
0201 :(1.0E
L203
- 040
0204
R204
$.504200
R205
NO
1.50'0
210 00(0IF M
P02026106
0440
av"l?'
110
420422.
C1011
Ift.50%
201SO
O0%
100
.57
350 00E0
IF Ai/
V933
We" 3v
3%-..
%%
0
3I
02"
130
0205640
04111
3400/6%
I.F.
TE
ST PO
INT
1150.1
V
r
9vP-A
13730,
More D
ata on Opposite P
age
MIS 141100 U
M O
R 00014 01 19A
.1
A. T
O C
OT
CR
T O
M A
NT
01011EL
11211000 3007100 LE
AD
011 EA
CH
11100 04 CO
NT
AC
T 0050[114050.4 T
O T
HA
T C
H -----
a r NO
M 11001 050 SU
CC
ESSIV
E C
HA
NN
EL
] .2 TO
CU
T C
R7 G
EE
RE
MO
VE
MO
OT
= L
EA
D O
N E
AC
H E
NO
OF T
HE
SE C
5.1101 5C
.IF A
LM
11101 MA
IM. M
C T
O 51 =
ID T
O C
UT
OF C
RT
CU
T T
HE
CO
NT
AC
T L
UG
SET
.. SHO
RT
ING
RIN
G A
ND
s,TC
H A
LA
DE
.0111R
EA
R,
V1E
FRO
M FR
ON
T SID
E
010011 OR
RIM
OF 1.11, T
IME
R
300-
MIM
IITN
E111,
021704206
4/ 10%214
R 20
2 0.C
1105220N
2004R2,5
R219
22110%1
42102000
:IA
1.1111"3S1C
/0150
V205A
AE
C1.2400
AT
EP
RIM
44300
GO
O/2 4656
560
=A
I
110V12
230 0221J100
II
22122 203
I
3
10%0%
- -H
IV
---130 0 11.21110
22
SYN
C 3PL
ITT
E22058
41016
022511205%
25
42010 J203
9204.11109
0 420
5111TC
3110C
TE
ST PO
INT
L50
02E33 C
AT
ER
.= M
OM
AL
L E
LE
CT
RO
LY
IIM A
R 2001
AL
L 1131310113 401 1/1 0, 20%
AL
L N
W. C
APA
CIT
OR
S AR
C 4000,20%
TO
LE
RA
NC
EA
LL
CE
RA
M. C
APA
CIT
010 AR
E 1110. 5000.20 %
TO
UR
AN
CI
KA
IAK
S AM
191/0.0.11 WA
RM
ED
11115 =R
AW
340041. WM
. CO
NT
RA
ST C
ON
TR
OL
AT
10.1111110. AL
LO
TIW
R 000101/007 FO
R N
OR
IA. O
PER
AT
ION
.11004
100
DC
4O/.10001 M
AM
A=
000 700 TO
050$1111600000, T
OL
MA
N=
01 200% 010111M
c 00 AL
LR
E 0011012
MIN
NO
WL
L 01.E
5 00001/010 III 200 /00001 02000100L
. VO
LT
A. 120 v
IIST
440
01035401SE
E
203
540311200/0%
0403.05
10%20
4533310%
1.09I N
IG10%
0.00E
r°
C4O
T IN
D00V
90%
010% 1
0417009J-0
1.11.0
R412
v
-0405-
C5
04(3
40
$rat
,200
5%10%
04205%
i'V5
0 9001C
404.01
IR 05
4E0. s, io %
002lim
o20%
_2.'
1.1:1M
K0%
20191 10%
- 00 -3
v 10
.019.1 5390
5 60 sov
1000
.0"4700
150
011350
510T
04004005,3110
MIA
01040
CA
..001 N
FO00%
9405
00
=O
K1000
1000
11415820
120010%
10%
0110
0410.0471=
1001/10%
AT
RA
V=
MO
D5(57
OS
111134010%
711_ S
O Stn1FD 5%
63:035%4404
.0.,0
. MO
N0413
11I
114220411
tro0412
420an.
F'AI--.00030
5% ,
201.-%-0--
%.
MO
T-a 0
7C
4112-.3.
5205%
0505.6
4423O
E 10%
0414001100
O04.05
3.
R4/4
12K5%
00023E
0320.IC
HO
LD
1.0340,20%11 M
OL
D
00042203/1
1500
CM
=
150V
RN
11TIE
.R
ED
7502
34373100
V505
16361N
VR
EC
TIFIE
R
NV
400VB
OO
ST SO
UR
CE
0011
CaO
bE
1 400114
.1-0514
.0IM 61.0
I KV
10%
E/C
ON
T R
AST
0101IT
S
51KD
EFL
EC
TIO
NT
O=
ASSE
MB
LY
150450017
19BiP
,ha
FIL
1501
11
050m
oo
0502SA
TS
DO
UIPE
R
ISO0
C11011IC
IT
AIL
LC
C513
TA
KE
500
3rTA
L1
FOR
OA
K
C512
.00100
20V
11NO
V
MO
W100ST
FOC
US
AD
AM
ITM
EN
T
PRIN
TE
D SC
HE
MA
TIC
TU
NE
PINC
OM
O FO
R D
UA
L-PU
RPO
SE T
ILE
SP
PLA
TE
MG
T.. A
l21.
PLA
TE
(SEC
TIO
N 81
IN4T
100E(=
MN
Al
20C
AT
HC
OE
15EC
7 0R11
1GC
CR
ITR
OL
. OW
(SEC
TIO
N A
I24
002.01_ aD ISE
CT
4 1111G
2 50EE
0 ON
OC
SEC
TIC
MA
)202 SC
RE
EN
Mall
OE
CT
ICR
IFIL
AM
EN
T
CO
PY
RIG
HT
1964 BY
ELE
CT
RO
NIC
TE
CH
NIC
IAN
OJIB
WA
Y B
UILD
ING
. DU
LUT
H 2. M
INN
ES
OT
A
T V
CH
AS
SIS
MA
ST
ER
ON
/OF
F
PW
RX
FM
R
BLU
E
RE
MO
TE
PW
RR
EM
OT
E P
WR
CA
PP
LUG
illII
I
PIN
VIE
WP
IN V
IEW
BLU
iD=
0
Et-F
tM
2 S
ELE
N R
EC
T-*
I
XF
\MIF
f14
11
ED
=D
-G
RA
Y
GR
AY
RE
D
3r
- -
CI
LT-1
8 M
FD
*50
V
BLU
E
SI
S2
cr-o
ON
/OF
FS
W P
RO
G,c
(S
W NO
NO
.I
S 4
[N .C
._ M
OT
OR
AS
SE
MB
LY_
_
M1
RE
LAY
Low
SO
CK
ET
VIO
LET
BLA
CK
-1-
-4 zS
3; G
RE
EN
MU
TE
;6S
W
PLU
G
I4
1:1
63L
TY
PIC
AL
CO
NT
RO
L U
NIT
IS
PE
AK
ER
PLU
G
2
5I
400
o
3
GR
EE
N
I
BLA
CK
BLA
CK
Irr
ilirr
,I A
UD
IO X
FM
RT
V S
PK
RI
TV
CH
AS
SIS
GR
EE
N
BR
IGH
TN
ES
S
HO
RIZ
HO
LDV
ER
T H
OLD
I CI
L_J
L_I
L_J
T50
4
SR
501
L501
BA
CK
SID
E
r---
--7
L303 0
6DT
66G
C5 O 6AU
6
I L30
1
DIO
DE
Th
0
0
jPO
WE
RT
RA
NS
1 O
L213
L
0
L208
6GN
86E
B8
L302
CE
NT
ER
ING
AD
JUS
T
DE
TE
CT
OR
IG3G
T
YO
KE
SO
CK
ET FO
CU
SA
DJU
ST
LDR
RA
NG
EA
DJU
ST
r R40
8
VE
RT
LIN
6FQ
7
6BJ8
R40
66C
W5
VE
RT
HG
T
6CB
60L
206
6BZ
601
-201
00
L2070
L204
6BZ
61-2
°°5
111
L202
6GH
8L2
03T
503)
N
2
1/4-
11 201
"'")1
"22
9(ig
.3 2
2g-v
v.-
228
1201
120'
2%
."*.
/NN
'.
''"'2
2 \-
"427
209
0
-1e4
jriX
tieI 5.
.pri
(.4
.6.
3
-T "
468
26T
1S'
203
p-T
A C
GC
s20
6G
1-11
-1 2
04N
205
(.4
\\f.
5.?
0,P
INI 2
25
221)
223 22
4
."-1
?08
1G
1K
G
- 1
213
(St.
-V
a,B
.1L
e;,4
CP
e4 N2K
HT
N
2P60
18 \
J206
222
AU
DIO
ii0
2H
.s...
...t,)
....1
.13
PAc,
)-.
T 1
--, H
p--
1G
nr^
703
C,
(AI
.44z
,_.e
....T
K-i-
302
0
309.
.....\
A J
.:2-X
,...
301
6AU
6
iii,-
.0-1
A.A
....,
w
en
J208
71
gr-t
-"
Tel
(.4
0
tIce
)21
4
Nita
"-10
209
C44
1204
1207
21T
S/
"I
14
N
IP.
5:--
-NA
A,-
44-
41,4
8j_
1 1
1209
IH
Ipl'
T,3
'6.
342
',0I* 'V
+15
02P
s'eS
AA
.e.
I22
1
304
jr-13
1030
930
8J3
01 w
1.6.
3vr
)".."
*.\e
"
11k:
4,4
+.1
/40
CA
031
00tn
101 30
8J3
09 311
MA
GN
AV
OX
TV
Cha
ssis
40-0
1-11
, -01
-21,
-05
-11
, -05
-21,
-06
-21
and
-08-
21
ELE
CT
RO
NIC
TE
CH
NIC
IAN
7-&
-OC
Ar
849
Apr
il 19
64
Mor
e D
ata
on O
ppos
ite P
age
CO
PY
RIG
HT
196
4 B
Y E
LEC
TR
ON
IC T
EC
HN
ICIA
NO
JIB
WA
Y B
UIL
DIN
G, D
ULU
TH
2, M
INN
ES
OT
A
is? p
G1
G2 K
H
6GC
5
, us
NG
G3
°
311
6DT
6
307
To
+6.
3
DE
FLE
CT
ION
P
6CW5
K
GI
G2
407 41
2
414
"-J4
04
408
406
406
-141
001\-
1\-N40
3K
I8,
18
T.4
6G
I63
4 1
piP
3K
3
411
1303
1
relr 0
Ot
305
-
J304
0
.,ti
K24
4135
N4
I 0_
K1
' 'G
I
H00
....(0
3059
d2
P1
, K2
/NA
A.,-
-..,
....
....-
_J 4
0 1
....-
111.
...
..H
(401
no. a
406
4 61
1J4
0540
240
1k -
---1
4?2
401
4-I
J140
3'..'
-is/V
\e...
`440
1
---A
A,A
(0
M1C
RA
DIO
R:3
PR
ON
O IN
PU
TI N
-0
V°B
LUE
PLA
YR
EC
OR
D
itig.9_
41f.1381(
WH
ITE
f-
ELE
CT
RO
NIC
TE
CH
N IC
IAN
TirE
hriTE
FC
OM
PLE
TE
MA
NU
FA
CT
UR
ER
S' C
IRC
UIT
DIA
GR
AM
SA
ND
TE
CH
NIC
AL IN
FO
RM
AT
ION
FO
R S
EV
EN
NE
W S
ET
S
Schem
atics No,
AD
MIR
AL
844T
V C
hassisD
61-1, -2, -4D
610-1, -2, -4
AIR
LINE
847T
V C
hassis 10-116-254 and -254UM
odels GT
C-3914A
, -44A,
-54A, G
TC
-4914A
, -44A and -54A
GE
NE
RA
L ELE
CT
RIC
845R
adioM
odels 11R31,
-33, T225A
, -35A and
-36A
MA
GN
AV
OX
850T
V C
hassis40-01-11, -01-21, -05-11, -05-21, -06-21
and -08-21
49
47K
RI
ISO
But
SLA
CK
11IV M
29182(A
LT V
-M 30671)
SLU
E
220K10%
+65V
7
6EU
7
R9
.022
2.21,1+
.75V
020
3.3K10%
10%
II10
97
VF
IL_T1
i.0. --R
EC
OR
D
220014
Qi
YE
LLOW
EX
T.
AM
P.
JAC
K
GR
EE
N
fitIOK
10%
680uuf 10%0P
1
29150K
10%14
1312
I VI
y1(
..e-RE
CO
RD
RC
A848
Record P
layerR
P -215-C
1
VM
850T
ape Recorder
Model 725
WE
ST
ING
HO
US
E846
Radio C
hassisV
-2528-3M
odel H -883N
29
R9
LOU
DN
ES
SV
-1.127748IM
Cl
0.006
.i- RE
CO
RD
C9
_270'm
u}20%
C222
6GW
8R
ED
C6-022
IO0315
500KT
RE
BLE
V-1427747
C IS
Ouuf
10%
R:?
uuf220
270 20%
22
Ary.
850V
MT
ape Recorder
Model 725
OU
TP
UT
TR
AN
SF
OR
ME
RV
-6112791
SLU
+175 V
+190V
R12
April 1964
ELE
CT
RO
NIC
TE
CH
NIC
IAN
TrC
hZ1=
1C
OM
PLE
TE
MA
NU
FA
CT
UR
ER
S' C
IRC
UIT
DIA
GR
AM
SA
ND
TE
CH
NIC
AL IN
FO
RM
AT
ION
FO
R S
EV
EN
NE
W S
ET
SN
OT
ES
I. RE
CO
RD
AN
D P
LAY
SW
ITC
H S
HO
WN
IN N
OR
MA
L PO
SIT
ION
.
2. ALL R
ES
IST
OR
S IN
OH
MS
, 1/2 WA
TT
*20%, E
XC
EP
T W
HE
RE
NO
TE
D.
3. CA
PA
CIT
AN
CE
IN M
FD
, EX
CE
PT
AS
NO
TE
D.
4 CE
RA
MIC
CA
PA
CIT
OR
S, 500 V
OLT
S, C
AP
AC
ITY
011V, E
XC
EP
T A
S S
HO
WN
.
5.D.C
. VO
LTA
GE
S M
EA
SU
RE
D W
ITH
II ME
G. V
T V
M IN
PLA
Y P
OS
ITIO
N.
CLIN
E V
OLT
AG
E M
AIN
TA
INE
D A
T 117 V
OLT
S F
OR
VO
LTA
GE
RE
AD
ING
S.
7.LEG
EN
D- +
ELE
CT
RIC
AL C
ON
NE
CT
ION
. +N
O C
ON
NE
CT
ION
.
SW
ITC
HV
-81 30814
SH
OW
N IN
PLA
Y P
OS
ITIO
NR
EC
OR
D -e
o o'oT
o ooT
ono oT
o oomoo
GR
EE
N
3+3.7V
100
.001
SP
EA
KE
RV
-M 30802
4'X6'
114uu
20%21 b
.001 10%
+150Y
t
6
165
43
2V
TV
, 4.1I
11
4R
EC
OR
D
OS
CILLA
TO
RC
OIL
V-1112790
211
TR
IMM
ER
A5-250 m
ut
L- - - JE
RA
SE
HE
AD
ELE
CT
RO
NIC
TE
CH
NIC
IAN
andT
EK
FA
X are published m
onthly byE
lectronic Technician, Inc a sub-
sidiaryof
Ojibw
ayP
ress,Inc.,
Ojibw
ayB
uilding,D
uluth,M
in-nesota 55802.
Single copies, 60c
Subscription rates: U
.S
. and Can-
ada, $5 for1
yr.; $8 for 2 yrs.;$10 for 3 yrs.
Pan A
merican and
foreigncountries,
$9for
1yr.;
$14for
2yrs.;
$18for
3yrs.
Second class postage paid
at Wa-
seca,M
inn.and
atadditional
mailing
offices.P
OS
TM
AS
TE
R:
Send
notificationform
3579to
ELE
CT
RO
NIC
TE
CH
NIC
IAN
,O
iib-w
ay Building,
Duluth,
Minnesota
55802.
117 V 60 C
Y.
PO
WE
RT
RA
NS
FO
RM
ER
(MO
TO
R)
V-1129538
(ALT
. 29192).O
NM
I
FU
SE
15 AM
P 250V
017.01
600V
BLA
CK
el>
DIO
DE
600 P I
V.
RE
D
TE
L.C
I.1
T400V
RE
D
BLA
CK
+190V
C
+210V
702
33K
270(tuf 10%
+160V
01R
010
+112V
023
2WrA
+2-0.2t1
V -M
23036L
_3o! v_25:310uV
I
V -M
23035
41. rii:Colfy
I
+50 uf
250V
i
-7'_.,...
GR
EE
N6E
U7
BLU
E60W
eS
..1113
300H
UM
BA
LAN
CE
V .4.4 27749 R
I4
10K
R15
'400*150K10%
10%
CO
PY
RIG
HT
1964 BY
ELE
CT
RO
NIC
TE
CH
NIC
IAN
aO
JIBW
AY
BU
ILDIN
G. D
ULU
TH
2, MIN
NE
SO
TA
Plan yourweatherproof hi-fi
speaker installationsaround University...the most complete line.
APPLICATION
Low level system,moderate crowds orareas, patios, poolareas, motels, parkingareas, etc.
REQUIREMENTS
Voice and musicsound reinforcement.Compact size. Fiberglasreinforced polyesterhousing.
RECOMMENDEDSPEAKER
UNIVERSITY
MODEL MLC
SPECIFICATIONS
15 watts150-15,000 cps120° dispersion123/4" x 91/8" dia.105/8" deep
Moderate power systems,high quality publicaddress and highfidelity. Concert halls,large patios, shoppingcenters, recreationareas, etc.
Lightweight, shallowdepth, replaces trumpet/driver installations wherehigh noise/distancepenetration is necessary.Wide audio range,superior bass response.
UNIVERSITY
MODEL CLC
30 watts55-14,000 cps120° dispersion223/4" dia.12%" deep
Moderate to highpower systems forhigh fidelityreproduction. Stadiums,arenas, ball parks,outdoor concerts.
Greatest efficiency.Full low -end frequencyresponse. Highintelligibility. Maximumdistance penetration.
UNIVERSITY
MODEL WLC
30 watts50-15,000 cps90° dispersion331/2" dia.20" deep
Shown here are the world's finest weatherproof speakers-each a complete system providing smooth,balanced bass, mid -range and high frequency response for indoor and outdoor high fidelity installations.University weatherproof design and construction-proved in rugged military applications throughout
the world- insure their reliable operation under all environmentalconditions-rain, snow, wind, humidity, etc. For complete details
A DIVISION OF LING-TEmco-NOUGHT, INC. and Free University Public Address Catalog, write : Desk ET -4,LTV UNIVERSITY DIVISION, Oklahoma City, Oklahoma.
- - - for more details circle 57 on post card
LTV UNIVERSITY9500 West Reno, Oklahoma City, Oklahoma
APRIL 1964 19
TUNER REPAIRS
FOR COMPLETE OVERHAUL
Includes ALL parts (except tubes)ALL labor on ALL makes
24 -HOUR SERVICE with
FULL YEAR WARRANTY
Sarkes Tarzian, Inc., largest manufacturer of TV and FMtuners, maintains two completely -equipped Service Centersto serve YOU. Both centers are staffed by well -trainedtechnicians in this specialized field and are assisted byengineering personnel to assure you of FAST, DEPEND-ABLE service.
Tarzian-made tuners-identified by this stamping-received one day will be repaired and shipped out
the next. A little more time may be required on other makes.Every channel is checked and re -aligned per manufacturer'sspecifications, not just the channels which might exist inany given area.
You get a 12 -month guarantee against defective work-manship and parts failure due to normal usuage. Cost toyou is only $9.50 and $15 for UV combinations, includingall labor and parts except tubes. No additional costs. Nohidden charges. All tuners repaired on approved, open ac-counts. You pay shipping. Replacements on tuners beyondpractical repair are available at low cost.
When inquiring about service on other than Tarzian-madetuners, always send TV make, chassis and Model number.Check with your local distributor for Sarkes Tarzian replace-ment tuners, parts, or repair service. Or, use the addressnearest you for fast factory repair service.
\T-ISARKES TARZ IAN, INC.TUNER SERVICE DIVISION
See your distributor, or use the address nearest you
537 South Walnut St., 10654 Magnolia Blvd.,
Bloomington, Indiana North Hollywood, Calif.
Tel: 332-6055 Tel: 769-2720
Manufacturers of Tuners ... Semiconductors ... Air Trimmers .. Radios ... AM - FM Radios ... Audio Tape . . Broadcast Equipment
20 ELECTRONIC TECHNICIAN
WORLD'S LARGEST
ELECTRONIC TRADE
CIRCULATION
RON KIPP
VICTOR L. BELL
JACK HOBBS
WARREN CREWS
DONALD HEDMAN
ALEX ORR
EARL HINTZ
MAGGIE KANE
JIM GHERNA
JOE WOLKING
DONNA GEARY
Publisher
Editor
Managing Editor
Technical Editor
Assistant Editor
Assistant Editor
Production Manager
Advertising Production
Art Director
Circulation Mgr.
Circulation Fulfillment
AN OJIBWAYPUBLICATION
OJIBWAY PRESS, Inc.Ojibway Building
Duluth, Minn.55802
AREA CODE 218 727-8511
Sales Offices:
NEW YORK: Ron Kipp, 555 Fifth Ave.,New York, N.Y. 10017AREA CODE 212 MU7-8080CHICAGO: William Klusack, 221 N.LaSalle St., Chicago, III. 60601AREA CODE 312 CE 6-1600CLEVELAND: Arnold T. Suhart, 6207Norman Lane, Cleveland, Ohio 44124AREA CODE 216 YE 2-6666LOS ANGELES: Boyd B. Garrigan, 1145W. Sixth St., Los Angeles, Calif. 90017AREA CODE 213 HU 2-2838SAN FRANCISCO: Stearns Ellis, 260Kearny St., Room 206, San Francisco,Calif. 94108AREA CODE 415 GA1-0593
Copyright 1964 by Ojibway Press, Inc.,Duluth, Minn. 55802. Reproduction and re-printing prohibited except by writtenauthorization of the publication. Subscrip-tion price: $5 for 1 year, $8 for 2 years,$10 for 3 years. Foreign, $9 for 1 year,$14 for 2 years, and $18 for 3 years.If you have a change of address or a ques-tion about your subscription, write: ELEC-TRONIC TECHNICIAN, Circulation Depart-ment, Ojibway Building, Duluth, Minnesota.55802. BE SURE TO SEND ALONG THE AD-DRESS LABEL FROM YOUR MOST RECENTISSUE.
APRIL
FEATURES
onNICA16.11AN
1964 VOL. 79 No. 4
Use The VOM 41Eugene Pudil tells TV -radio and Hi Fi technicians how to use their VOMs tobest advantage
Extra Profits With Rear Seat Speakers 44A step-by-step photo story shows how to install rear seat speakers in autos
Avoiding Pitfalls in Transistor Testing 46William Orloff discusses techniques of transistor testing
Telephone Directory Advertising 50Article explains how to make your yellow pages ads talk
`By Gosh You're Right' 52A true-to-life in -shop story that you can't afford to miss
There's Money In Ideas 55An article that may change your business outlook
Troubleshooting With the VTVM 58Chuck Zachman describes some of the things your VTVM can do better
It Only Looks Like AGC 88If you think the trouble you're having is caused by AGC, read this articlebefore you waste time
Looking For A New Location? 92Conclusion of Prof. John Mertes's article on successfully moving to a newlocation
`Magic Words' For Success 95Tips on courtesy, 'half -courtesy' and customer complaints
DEPARTMENTSLetters to the Editor
Coming Events
Free Literature
Editor's Memo
Technical Digest
22 'Tough Dogs' 62
28 Shop Hints 64
30 New Products 66
34 New Books 82
37 Industry News 96
Advertisers Index 98
TEKFAX 16 PAGES OF LATEST SCHEMATICS
ADMIRAL: TV Chassis, D61-1, -2, -4,D610-1, -2, -4.AIRLINE: TV Chassis, 10-116-254 and-254U Models GTC-3914A, -44A, -54A,GTC-4914A, -44A and -54A.GENERAL ELECTRIC: Radio, Models 11R31,-33, T225A, -35A and -36A.MAGNAVOX: TV Chassis, 40-01-11,-01-21, -05-11, -05-21, -06-21 and-08-21.RCA: Record Player, RP -215-C1.VM: Tape Recorder, Model 725.WESTINGHOUSE: Radio Chassis, V-2528-3, Model H -883N29
APRIL 1964 21
when you
bug the #270Ungcuz de -soldering kit
Buy this kit, and mail the cou-pon inside for Ungar's #861Triangle Tip and #863 CubeTip. A $1.20 value absolutelyfree !Ungar's #270 De -SolderingKit contains a lightweightpencil Handle with full length,extra flexible insulated cord.Plus the #4045 Super Hi -HeatUnit with special 3/16" tap.Also five speci 1
soldering tips : #857 SlottedTip, #856 %" Cup Tip, #85534" Cup Tip, #854 1" Cup Tiand #858 Bar Tip.These tips remove components70% faster, because they dsolder all terminals simultanously. Correct heat is deliveredexactly where needed to pre-vent lug breaking, shorting,and printed board rupturin
ONLY $5.83 ea.
BONUS OfifteFREE DE-SOliDERING 1101111liETFor Just Visiting Your Ungar Distributor! Get It Now!
UNG R E LE C rr IR, ITOOLSELECTRONIC DIVISION OF ELDON INDUSTRIES, IN
Hawthorne, California 90252
LETTERSTO THE EDITOR
IntelligibilityKudos to George Riley for his
well written and interesting articleon communications microphones inELECTRONIC TECHNICIAN for Jan-uary.
Because of the importance of theshaped frequency response charac-teristic to intelligibility of the trans-mitted signal, these considerations,we think, should be included. The"fricative" consonants are con-sidered to be "t," "s," "ch" and"k." They contribute materially tointelligibility and depend upon the3 kc range for their effectiveness.The "p" sound which George Rileyincludes, is an invoiced explosiveformed by the lips, and is generallyconsidered to be a labial like "m","b" and "v," all of which contrib-ute in an important, though some-what lesser degree to clarity. Thelabials, however, require the 5 kcrange and higher for propertransmission.
The point should be made thatthe 3 kc rise followed by cut off,as demanded in communicationsmicrophones, is a concession to therequirements of the radio equip-ment and the loudspeakers withwhich these microphones are em-ployed. The radio pass band pre-vents the inclusion of the 5 kcrange because of splatter and in-terference in adjacent channels, andmost of the speakers used, espec-ially reentrant horns, limit signalabove the 3000-3500 cps point.Maximum intelligibility, without thelimitations imposed by the com-munications radio pass band, andpublic address reentrant horns, pre-scribes that the energy rise include5 kc according to authoritieslike Steinberg, Fletcher and others,and not solely at 3 kc as mightpossibly be imputed from thearticle.HOWARD T. SOUTHER Dir. of Sales
The Astatic Corp.Conneaut, Ohio
Patented ConnectorI have subscribed tO ELECTRONIC
TECHNICIAN for approximately twoyears now and I enjoy your cover-age of the electronics industry.
- for more details circle 56 on post card22 ELECTRONIC TECHNICIAN
QUESTION: When it comes to electrolytic capacitors, why do more
than half of the nation's Radio -TV Service Technicians
prefer to do business with Sprague Distributors?
NSWER:Because they don't want makeshift substitutions ormulti -rating "fits -all" capacitors. They insist on exact
replacements, which are always available throughSprague Distributors everywhere.
SPRAGUE TWIST-LOICCAPACITORS...
1701 different ratings and sizes...
the world's most complete selection
of EXACT replacements!
We don't have to tell you that it's easier to service with exact
replacements. And we don't have to tell you that it's better, too.When sets are designed, specific capacitance values are used forpeak operation, so it takes exact replacements to restore originalset performance.
And who better than Sprague knows which values and sizes areneeded in the replacement market? Sprague, the world's largestcomponent manufacturer, has the most complete specification fileon original set requirements. That's why you're always rightwhen you service with Sprague TWIST-LOK exact replacements!
GET YOUR COPY of Sprague's comprehensive ElectrolyticCapacitor Replacement Manual K-106 from your SpragueDistributor, or write Sprague Products Company, 65Marshall Street, North Adams, Massachusetts. SPRAGUE®
THE MARK OF RELIABILITY
WORLD'S LARGEST MANUFACTURER OF CAPACITORS
APRIL 1964
- - for more details circle 55 on post card23
SO SMALL you can hold it like apencil, guide it just as easily.
SO LIGHT IN WEIGHT you can useif for hours without tiring.
SO EFFICIENT it does the work ofirons having much higher wattage.
SO COOL AROUND THE HANDLE itwill never overheat your hand.
SO RUGGED it's unbeatable for longlife and dependable performance.
SO LOW IN COST you can't affordto be without it.
"Pencil" Soldering IronA 25 -watt, 115 -volt iron that's ideal for miniature -type soldering.
Complete with tip and cord set. Screwdriver -shaped tipsavailable in three sizes. Model W -PS. $5.20 list.
Buy Weller "Pencil" Soldering Irons at your Electronic Parts Distributor.
WELLER ELECTRIC CORP., 601 Stone's Crossing Rd., Easton, Pa.- - - for more details circle 58 on post card
24 ELECTRONIC TECHNICIAN
LETTERSTO THE EDITOR
Your article "Antenna Season"in the February issue was of in-terest, particularly the major causesof failure. Here in southern Cal-ifornia 50 and 60 ft masts are notuncommon. Needless to say, de -telescoping one of these masts toreconnect broken lead-in terminalsis quite a task. After having to per-form this job a few times, I de-veloped a permanent type connectorthat lasts the life of the lead-in andthe antenna (U. S. Patent No.3042892).
Some of these connectors are stillin use that were installed over fiveyears ago, and still performing wellin desert winds and extreme temper-atures, as well as coastal areaswhere salt air corrosion is a prob-lem. To date there has not been asingle failure.
Anyone wanting further informa-tion may get in touch with me.
LESTER HAYWORTH45432 Kingtree Ave.Lancaster, Calif.
Radio Craftsman C300I need a schematic for a Radio
Craftsman C300 equalizer-preamp-lifier-about 1963. It has 4-12AZ7sand 1-12AV6.
Would appreciate any help youcan offer.
Chicago, Ill.JOHN LESLEY
Hogwash!Your February editorial and
POPULAR MECHANICS MAGAZINEboth indicate ignorance of today'sservice industry and of normal shopprocedures.
I'm especially appalled that theeditor of ELECTRONIC TECHNICIANis totally unaware that while -you-wait service is not an economicallysound practice unless a specialtyis made of this service.
The industry to date has not ap-plied the charges where they belong-on the technical service side ofthe bill. Four out of five sets comein with the tubes checked-and allthe shop owner has to sell is histime.
The allegation that refusal to ren-der immediate service is a criterion
Qualityis no
gamble!.05 ± 10%600V -EM
dp
ActualSize
when you specify ELMENCO dipped Mylar*paperEvery time you make a call ... service a circuit ...change a component - you bet on the parts used. Make sure the oddsare in your favor with miniaturized Elmenco Dipped Mylar-Paper (DP) capacitors. Over 100 million are in use now,because Elmenco DP capacitors give missile quality at commercial cost. Whether for radio -TV repairs, or criticalindustrial circuitry, reliable, dependable, rugged Elmenco capacitors eliminate profit -killing callbacks and customercomplaints. Elmenco DP capacitors operate at 125°C without derating, are completely moisture proof, and are up to 50%smaller than comparable types. You can substitute values in a capacitor, but never virtues. Ask for Elmenco, and be
sure you get it. Elmenco DP capacitors are available from stock only at authorizedARCO distributors throughout the U.S.A.*Reg. Du Pont Trademark
ARCOelectronics inc.
APRIL 1964
ARCO'S RESERVE WAREHOUSESYou can get your Elmenco (DP) capacitors inany quantity within 24 hours from coast tocoast. They're stocked in depth at Arco'sreserve warehouses serving authorized Arcodistributors throughout the nation. Call yourArco distributor today!
Community Drive, Great Neck, N.Y. El 516 HU 7-0500Branches: Dallas 7 El Los Angeles 35
- - for more details circle 11 on post card25
pleasure pak
14,41P4P(Ps,P4x.F.,,NP:OP
DISTRIBUTOR SALESOWENSBORO, KENTUCKY
Pleasure -Pak COUPONEXP1*** CAT(, JULY 16, 1914
es Pteeseseestt mowna Nitlb mt., ,Oro tom ess eyeono, oos pop*** A* 114t*s**
3 PetastosoPet Coups ..1.111" Ams0
Menem** Gomm It 53,40.1*. *led1 Pieresnotsit Cottpert 'axe .1 lir Ms*
tros "epos and rartteo W.' I
g....pa (Y. ter yOLO tbar.4
ros soot 4i K. tn any 91. CO." Mvnicl
as* ts pee** toed or 01*tens mewed Cast, se* rs ore oSt errsense*
1.1
Mews*NEM**ita law
He WPM,
26 ELECTRONIC TECHNICIAN
are -Pak SELECTION TORNI LTC OM. Mason -OTT Nooporto.
,oras$ Pan Sou..0 1411.501M 6.1108
SIP AMMO TO
Gnanti boons. PODoo PM Mo.
01,1111,011.
Get in on General Electric'sPleasure Pak programThe purchase of General Electric tubes makesyou eligible to receive valuable merchandiseduring G -E's Pleasure Pak program. Importedmusical steins, luggage, barbeque grills, tools,sporting equipment, carving sets and table-ware and many other things can be yours at atremendous discount or even free. All of theseare well-known brand name products or specialitems that are not normally for sale.
Make your own selectionsfrom G -E Pleasure Pak booksYou're not limited to just one or two items.General Electric Pleasure Pak books contain48 handsome "prizes," accurately illustratedand described. When you buy G -E tubes, youearn one of these books. Then it's your choiceof the merchandise inside.
Ask your G -E distributorhow to earn Pleasure Pak booksYour General Electric receiving tube distribu-tor has a supply of Pleasure Pak books. Theback cover of each book is a certificate redeem-able for the merchandise shown in the book.Ask your distributor how to get them. ThePleasure Pak program is limited to April andMay, 1964. Better stock up on G -E tubes NOW !
Progress /s Our Most Important Prodorf
GENERAL ELECTRIC
- for more details circle 32 on post card
APRIL 1964 27
SHAFTS ANDFOR NYLON
PLASTICS IN TUNERS!
SUPER 100 . . . is a fast drying
cleaner and lubricant that is excellentfor TV tuners. It cleans contacts
sparkling clean and evaporates quickly
leaving a lubricated coating.
Dealer Net . . . $2.25Money Back Guarantee!
Cat. No. 100-8
INJECTORALL COMPANYBROOKLYN 14, NEW YORK
CAT, No. 700.8
NEW!8 oz. spray
can with 6" steelneedle.
- for more details circle 36 on post card
ADD STYLE TO PERFORMANCE . . .
THE FIRST FULLY TRANSISTORIZEDALL CHANNEL UHF CONVERTER!GAVIN is the pioneer in the development and production ofNuvistor and Transistor UHF products. The GAVIN UHFConverter offers not only high quality performance, but stylingfeatures such as a walnut -grained front panel, pilot-litechannel illuminator and easier tuning over all 70 UHF channels.The versatile line of GAVIN UHF Converters and Boosterssatisfy every market need-metropolitan, fringe and translator.
AN., I 1\1 INSTRUMENTS
DEPOT SQUARE SOMERVILLE. N. J NCAREA CODE 201 PHONE. 722-6311
LETTERSII, TO THE EDITOR
of integrity and respectability is asfallacious as the tale of the moonbeing made of green cheese.
First -come -first -served is tradi-tional, yet there are those thatwould have us teach electronics tothe consumer at our normal servicerates. To you, and the do-it-yourselfmagazine may I say-Hogwash!
EUGENE ORRICOWhittier, Calif. No one said those who asked forthe set to be left were dishonest. Itjust happens that when the set isleft, the chances of being cheatedare greater. We still think thatthose shops who make it a policy ofnot looking at anyones set when itis carried in should re -investigatetheir policy. Even if you can't re-pair the set on a while -you -waitbasis, it should lessen their sus-picions of you.-Ed.
COMING EVENTS
April 11-15: 46th Annual Convention, Nat'l.Assn. of Electrical Distributors, Sheraton -Park and Shoreham Hotels, Washington,D.C.
April 12-17: 95th Semiannual TechnicalConf. and Equipment Exhibit, SMPTE,Ambassador Hotel, Los Angeles, Calif.
April 13-15: 3rd Symposium on Microelec-tronics, IEEE, Chase -Park Plaza Hotel, St.Louis, Mo.
April 27 -May 1: Intl. Conference, SPSE,Hotel Americana, N.Y.C.
May 18-20: The 1964 Electronic Parts Dis-tributors Show, Conrad Hilton Hotel,Chicago.
"It says here in small print, 'Don't expect tohear anything when your receiver is operat-ing, space signals are inaudible to thehuman ear'."
- - - for more details circle 30 on post card
ELECTRONIC TECHNICIAN
11111 STAXDAID MOP BAR
ADJUSTABLE SIZE WRITE oars
101 CROSSHATCH
11111 VERTICAL 115111
OIRIZINTAL SARI
PATTERN
VENTS/5M
CROESDATCM.DOME ONES
OOTCOLOR OARSS.
OFF 'TEE ON
LOOK!
COUR BAR WIER
COLOR OUTPUT500555
ASTANDARDCOLOR BARGENERATOR
at 1/2THE COST OF
OTHERSonly $1245°
?taw- e E 11 C CD 11CG126 STANDARD COLOR BAR GENERATOR
A standard color bar, white dot, crosshatchgenerator especially made for field service oncolor TV ... and at a great savings to you.
Check these outstanding features and youwill see why this generator belongs on the topof your ist for color TV servicing.
All patterns crystal controlled offering "rocklike" stability. You'll think the patterns arepainted on the TV screen.
Simplified operation speeds up every servic-ing job. Just dial the standard keyed bars,white dots, crosshatch, vertical bars or hori-zontal bars and watch them "pop" on thescreen. That's all there is to it.
Exclusive adjustable dot size. The white dotscan be adjusted to the size that satisfies yourneeds by a screwdriver adjustment on the rear.No need to argue about dot size anymore. Justselect the size that you like to work with best.
Pretuned RF output to Channel 4. Other lowchannels can be selected if Channel 4 is beingused in your area by simple slug adjustment.Patterns are injected directly into antennaterminals, simplifying operation and savingservicing time.
Reserved output on color bars for forcingsignal through defective color circuits. The coloroutput control is calibrated at 100 percent atthe center of rotation, representing normal out-put. A reserve up to 200 percent is availableon the remainder of rotation.
Smaller and more portable. With colorreceivers weighing much more than black andwhite TV, portable equipment becomes essen-tial for home servicing. The CG126 weighs lessthan 10 pounds and measures only 11" x 8" x 6".
1111111111
Ten standardkeyed colorbars (RCA type)that automati-cally provideall colors atspecified NTSC
phases ... but without need ofinterpretation when servicing.
Stabilizedcrosshatchpattern for sim-plifying con-vergence ad-justments.
Stable whitedots with newexclusive dotsize adjust-ment in rear.
10 thin whitevertical linesfor horizontaldynamic con-vergence ad-justments ...often missing
on other generators.
14 thin horizontal linesfor vertical dynamicconvergence. Alsomissing on many highpriced generators.
March into your local parts distributor and demandthe CG126 Sencore color generator that sells at 1/2the price of others. Don't let him switch you.
426 SO. WESTGATE DRIVE ADDISON, ILL.
APRIL 1964
- - - for more details circle 53 on pDst card29
CASTLE TV TUNER -EAST HAS
MOVED TO NEW LOCATION
WITH IMPROVED FACILITIESIn Long Island City near Postal ConcentrationCenter to provide faster service by mail.
3
,
4114
COLO
_-----
11
All other U.S. and Cana-dian Servicemen will getthe same fast servicefrom CASTLE -CHICAGOand CASTLE -CANADA.
OKLA
Till
ALL MAKESALL LABORAND PARTS(EXCEPT TUBES)*
ONE PRICE
995THIS ONE LOW PRICE INCLUDES ALL UHF , VHFAND UV COMBINATION' TUNERS
Simply send us your defective tuner complete; includetubes, shield cover and any damaged parts with modelnumber and complaint. 90 Day Warranty.Exact Replacements are available for tuners unfit foroverhaul. As low as $12.95 exchange. (Replacementsare new or rebuilt.)*UV combination tuner must be of one piece construc-tion. Separate UHF and VHF tuners must be dismantledand the defective unit only sent in.
Pioneers in IV Inner Overhauling
CASTLETV TUNER SERVICE, INC.
EAST: 41-92 Vernon Blvd., Long Island City 1, N. Y.MAIN PLANT: 5713 N. Western Ave., Chicago 45, Illinois
CANADA: 136 Main Street, Toronto 13, Ontario*Major Parts are additional in Canada
FREE LITERATURE
CB BASE STATION 300Literature describes a 23 -channel citizens band
base station receiver and transmitter featuring broadand narrow selectivity receiver switching; transmittercompression amplifier and clipper -filter stage. Brown-ing Laboratories.
AUDIO CENTER 301Information details a radio and portable phono-
graph merchandising program that provides dealerswith a long-term inventory finance plan and a low coststore display fixture offer called "Operation Exposure."Philco.
TRANSISTORIZED CONVERTER 302Literature gives specifications on a transistorized
converter for operation of ac appliances and tools froman automobile, boat or any 12 vdc source, GC Elec-tronics.
REFERENCE GUIDE 303Information covers a new two color 22 x 17 in.
Filter Guideline Application Chart for TV -radio tech-nicians. CDE.
SPEAKER SYSTEM 304This technical sheet describes the Free -Piston
speaker system that contains a woofer and tweeter andis said to have a frequency response from 38 to 18,500cps. Fisher.
STEREO COMPONENTS 305This sixteen page catalog describes a full line of
tuners, amplifiers, receivers, tape decks and tape re-corders. Bell Sound.
RESISTORS & SWITCHES 306A twenty page catalog describes a line of wire -
wound and carbon replacement resistors, pots, switches,etc. for service technicians. Clarostat.
CHANGEABLE SIGN 307Information covers a changeable-copy store sign
with four different letter sizes to choose from. HanoverMfg.
HI Fl CATALOG 308A 2 -color, 32 -page catalog covers a complete line
of stereo and monophonic Hi Fi equipment, test instru-ments, ham gear, CB radios and transistor radios, avail-able in both kit and wired form. Eico.
COMING NEXT MONTH IN ...ELECTRONIC TECHNICIAN
REPLACEMENT CONTROLS, SPEAKERS,CAPACITORS AND COILS
ELECTRONIC TECHNICIAN- - - for more details circle 21 on post card
CHECKS AND REJUVENATES ALL PICTURE TUBESWITHOUT ADAPTORS OR ACCIDENTAL TUBE DAMAGE_
The All New
SENCORECR125 CATHODE RAY TUBE TESTER
An all new method of testing and rejuvenating pic-ture tubes. Although the method is new, the testsperformed are standard, correlating directly withset-up information from the RCA and GE pictur
Ak. tube manuals.Check these outstanding features and you wil
see why this money making instrument belongs ontop of your purchasing list for both monochromeand color TV testing.Checks all picture tubes thoroughly and carefully;checks for inter -element shorts, cathode emission,control grid cut-off capabilities, gas, and life test.Checks all picture tubes with well filtered DC justlike they are operated in the TV set.Automatic controlled rejuvenation. A Sencore first,preventing the operator from over -rejuvenating ordamaging a tube. An RC timing circuit controls therejuvenation time thus applying just the rightamount of voltage for a regulated interval. Withthe flick of a switch, the RC timer converts to acapacity type welder for welding open cathodes.New rejuvenation or welding voltage can be re-applied only when the rejuvenate button is releasedand depressed again.Uses DC on all tests. Unlike other CRT testers thatuse straight AC, the CR125 uses well filtered DCon all tests. This enables Sencore to use standardrecommended checks and to provide a more accu-rate check on control grid capabilities. This is veryimportant in color.No adaptor sockets. One neat test cable with all six
AvfornalicFeaturing Controlled
Rejuvenation
.41111-2-1.2&A\)ctiN
,ISSIOlt
Met M
Q
cz;,F=t. CR 125 CATHODE RAY TUBE TESTER
All six sockets, in-cluding latest colorsocket, on one neatcable.
Checks Each Gun Indi-vidually In Color Tubes.
sockets for testing any CRT. No messy adaptors,reference charts or up -dating is required. The Sen-core CR125 is the only tester with both color sock-ets. (Some have no color sockets, others have onlythe older type color socket.)No draggy leads. A neat, oversized compartment,in the lower portion of the CR125 allows you toneatly "tuck away" the cable and line cord aftereach check in the home.
Model CR125 $69.95
PS127 DELUXE WIDE BAND OSCILLOSCOPEAT A
SURPRISINGLY LOW PRICE
This all new 5 inch oscilloscope offers the finest inperformance, portability and appearance. Verticalamplifier frequency response, flat within 1 DBfrom 10 CPS to 4.5 mc and only 3 DB down at5.2 mc insures true waveform reproduction. Ver-tical amplifier sensitivity of .017 volts RMS forone inch deflection on wide band (without bandswitching) is found only on scopes costing hun-dreds of dollars more. High input impedance of2.7 megohms shunted by 99 mmfd (or 27 megohmswith 9 mmfd with built-in low capacity probe),insures minimum circuit loading. For the first time,waveforms can be viewed in TV horizontal andvertical output circuits with the low capacity probethat will withstand up to 5000 volts peak to peak.To top that, the vertical amplifier attenuator con-trols are calibrated directly in peak to peak voltsfor fast direct reading of all peak to peak voltages.
Horizontal amplifier extended sweep range from5 to 500 kc in five overlapping steps and frequencyresponse from 10 CPS to 1 mc within 3 DB insureslinear sweep and positive sync. External inputs forhorizontal sweep and sync, intensity modulation,and smart two -toned case and "designer" styledcontrols brands the PS127 a truly professionaloscilloscope.
P5127 $169.50
1,1111t,t
SENCORE
al II
110A1/041Al711514E11(T
40 151/ 11111I op( toy estttt.stort
MODEL CR128For the man onthe go. Same asabove but in allsteel carryingcase ... . $69.95
- - for more details circle 54 on post card
IC
THE ELECTRONICS INDUSTRYIDENTIFIES ITSELF WITH DYMO!DYMO's M-55 TAPEWRITER makesraised - letter labels on -the-spot.Just dial letters, numbers, or sym-bols - and squeeze the handle.Letters come out crisp white on acolored background of self -stick-ing vinyl. Complete with round andsquare corner cutters, accessorywheels for technical symbols andvertical labels. With one tool, acomplete system of identification.Always use DYMO tape!
Suggested Price ;2995
FREE: Tape samples and full details.DYMO INDUSTRIES, INC., P.O. Box1030, Berkeley, Calif. Dept. ET -4-55
NAME
COMPANY
STREET
CITY gTA
Prices slightly higher in Cana
- - - for more details circle 27 on post card32
FREE LITERATURE
BATTERIES 309This six -page brochure covers a
line of sealed nickel -cadmium bat-teries for portable power use. Bur-gess.
HI Fl SPEAKERS 310A Hi Fi catalog details a line of
Hi Fi speakers that have 12 oz.Barium Ferrite (ceramic) magnetsand the capacity to handle morepower. Quam-Nichols.
BASE STATION ANTENNAS 311
A fixed station catalog featuresseveral new antennas in the fre-quencies used for mobile communi-cations. Includes antennas for the136-174 Mc band as well as an-tennas serving the 25-148 and 450-470 Mc bands. Andrew Corp.
TOOLS 312An 8 -page catalog describes a
complete line of tools and fixturesfor assembly, testing, inspection andelectronics servicing. Matrix En-gineering Corp.
SPEAKERS 313A 2 -color, 16 -page catalog fully
illustrates and describes a line ofgeneral purpose and replacementloudspeakers with easy -to -readspecification tables. Jensen Mfg.Co.
CB RADIO 314A 4 -page brochure describes the
Model 310-A transistorized two-way CB radio that weighs 5 lb.Cadre.
CB EQUIPMENT 315An 8 -page communications bro-
chure describes a line of SB two-way radios and accessories. Thebrochure includes mobile antennasystems, cable assemblies, crystalsand a series of noise suppressionkits for automotive use. Raytheon.
MOVING?Be sure to let us know your newaddress. Please enclose a completeaddress label from one of yourrecent issues.
Wt. ServecemaodYOU NEED
AND
ONLY
ONEFORMULA
ONLY
ONEPROVEN
TUNER CLEANER
for ALLTV TUNERS
including
THE NEWTYPE USING
PLASTIC PARTS
Don't be misled by themany varieties of so-calledcleaners at your jobber's. Theformula used by Chemtronicswill not harm the OLEFORM,DELRIN and NYLON plasticsused in today's new tuners.TUN-O-LUBE is fully guaran-teed!
TUN -O -LOBE does NOT con-tain CARBON-TET.
TUN
LUUB
AVAILABLE IN 3 SIZES
Cat. No. 1610-16 oz.Spray Can $2.98
Cat. No. 810-8 oz.Spray Can 1.98
Cat. No. 301-3 ozCaddy Size .98
CHEMTRONICS INC
1 2 60 RALPH AVENUE,BR'OOKLYN 36. N.Y.
in Canada Contact: Active Radio 8 TV Distributors431 King Street W. Toronto 28, Canada
- - - for more details circle 23 on post cardELECTRONIC TECHNICIAN
Here's the only excuse you may have for not installing the world's
best manual rotator at our REDUCED PRICES......you just don't use manual rotators in your area!
Say, on the other hand, you do sell them. And believe with all yourheart in selling the very best. What else can you do then but go withChannel Master rotators? Especially when you can now get our manualmodel at reduced prices.
This is the one rotator, remember, that makes all others look likealso-rans; because it alone has the high torque to turn the heaviestantenna array easily-plus the ruggedness to keep it on course in foul-est weather.
For instance: In addition to simplest fingertip control, accurate re-peatability, continuous instant direction indication, (and lots of othergood features), only Tenn -A -Liners give you:
Built-in hard -steel thrust bearings (not soft alu-minum parts). So friction -free the Tenn -A -Linerwill turn ice -loaded installations as heavy as330 lbs.
Hard -steel precision -machined gears (notstamped). So rugged that they won't strip orbind. Will continue to operate even in 70 milegale winds.
Pushbutton "On -Off" Switch (brand-new) thatmodal 9520 prevents reception interference caused by wind
vibration.... now what's your excuse for not calling your nearest Channel Masterdistributor?
NEW! Unique Gemini Rotator/Amplifier....for fast, neat 2 -in -1 installations thatsave you money 4 ways.
(A simple explanation of what the Geminiis-for those dealers who have heard aboutthis product's terrific profit success story).
Tenn -A -Liner Fringe -AreaRotator Booster
Gemini Rotator -Amplifier
(Where's the booster? It's hidden in the rotatorl.
11.Power Supply
Automatic Control with Gemini ConsoleConsole 2 set coupler
World's first all -in -one rotator -amplifiercombination! Only 1 unit on mast -1housing on set -1 transmission line.
Choice of 2 Models:NEW! TV/ FM Gemini, Model 9518."TV ONLY" Gemini, Model 9527
(includes Built-in FM Trap).
Tried our superb Automatic Rotators? There's nothingbetter. They're available at our regular prices.
CHANNEL MASTER ROTATORS© Channel Master Corporation 1964
ELLENVILLE, NEW YORK- - for more details circle 22 on post card
NEW EDITORS' MEMO
SECO TUBE TESTER
Model 98GIVE ALL MODERN TV TUBES,
GUARANTEEDTO
FILAMENTRECTIFIERS A
RADIO TUBES AND
COMPREHENSIVEANALYSIS . checks heater current
on series string tubes
Nei
5,10L LIAKA
E-rvat moo840 wEAK G,
HEArtaamarro.
-uNCTIONSWSTCH
MODEL 9
N
CATHODE SR,I110111101.11 U,
NEW SECO MODEL 98ONLY
7 NETThis new test instrument is acomplete tube tester that locates alltube faults quickly and accurately. It hasa two -stage DC amplifier which isolates the rugged1 ma meter from the tube under test, protecting themeter and permitting a wide range of load currents andtest conditions. The new Model 98 tests more than 2500 differenttubes. The entire unit is contained in a compact case with removable cover.The eover holds speed -indexed tube data cards, pin straighteners and condensed operatinginstructions. For complete information see your electronic supply dealer or write to Seco.
A SECO PLUS! Replaceablesocket chassis plugs into meter-ing chassis. Can be econom-ically replaced as it wears outor becomes obsolete. Availablewith special sockets upon re-quest. Guaranteed up-to-datefor all modern receiving tubesincluding novars, nuvistors,10 -pin types, compactronsand MAGNOVALS.
GRID CIRCUIT TEST de-tects faults such as gridemission, leakage and shorts-a rapid, reliable multiple -checkdeveloped and patentedby Seco.
TUBE MERIT TEST indi-cates functioning ability of atube by the quality of cathodeemission.
HEATER CURRENT TESTreads on meter. Relies onheater resistance to show coldoperation or improper voltagedistribution in a series stringof heaters.
ISECO SELECTRO SYSTEMisolates or transposes tube cir-cuits and controls test current-achieves laboratory pre-cision and flexibility with dial -switch ease and speed.
SECO ELECTRONICS, INC.1211 S. Clover Drive, Minneapolis 20, Minn.
A DIVISION OF DI-ACRO CORPORATION- - - for more details circle 52 on post card
34 ELECTRONIC TECHNICIAN
On Slaying GoliathTelevision is bread and butter for
technicians. Unfortunately, we can'tlive on just bread and butter. Nor canwe neglect it.
Diversification seems to be the key.But where to diversify? Unless you havea shop equipped to handle appliances-toasters, irons and such are definitelyout. Special tools, special distributorsand special knowledge are all requisitesand this cuts into your bread and butterbusiness.
But several areas which have greatpotential for sales and service are al-most suffocating in some places anddeserve your attention. You need nospecial equipment for service; you dealwith your regular distributor and thefacts you need are only an extension ofwhat you already know. And the bestpart, you can work in these areas whenthe bread and butter gets scarce.
Public Address. Closed circuit TV.Intercoms. Burglar alarms (Intrusionalarms, I'm told, is the proper name).Annunciator systems. Garage dooropeners (and a host of other remote ap-plications). The list is virtually endless.
I know, you say you can't competewith the "big boys" that just wired thenew auditorium for sound or installedCCTV in the new power plant. Andthis is true. Right now, at least, youcan't compete with the giants. But wakeup! Lower your sights! You have anedge on the giants that they can't getaround: They cannot compete with youfor the small business deals. They can-not afford to sell a small PA system tothe corner grocery store (or any othersmall retailer) unless he asks for it. Butyou can.
Every store you patronize is a poten-tial customer. Other than the owner,who knows better what he needs thanyou - another merchant in the sameneighborhood?
In talking with store owners you canprobably think of many devices he canuse. Maybe the grocery store managerwould like to know how many customersare passing in front of the meat counter- a simple photoelectric counter wouldtell him. Although turnstiles are fre-quently used in such applications, thephotoelectric device is a natural sincethe turnstile impedes traffic, but thosepassing a light beam rarely know it.
And your TV customers: on every callyou make, you have the toughest partof every selling job finished for you.You're in the house - by invitation!You're then free to talk about garagedoor openers, timers or anything.
All you have to do is be alert to yourcustomer's needs and use your head.If they truly need or want it, you won'thave any trouble selling it.
04-
THE FABULOUS INTERNATIONAL RECTIFIER 1964
'ROUND THE WORLD CONTEST!CONTEST OPEN TO ALL ELECTRONIC
TECHNICIANS AND ENGINEERSEnter As Often As You Wish!
MEET THE FAMOUS GEISHA GIRLS OF TOKYO!SEE THE SINUOUS TEMPLE DANCERS OFBANGKOK! ENJOY THE EXOTIC NIGHT LIFEOF NEW DELHI, INDIA! You are on your funpacked way around the world by Trans WorldAirlines, free for 28 days to enjoy the pleas-ures of 9 countries on 3 continents. m As youmingle with the friendly beauties of modernRome, watch the Folies Bergere in Paris, andbecome acquainted with the legendaryEnglish Bar Maid in London, you will know thatyour life is richer by far for the never -to -be for-gotten memories of your trip around the world.m So act today! Complete the entry form belowand send it to International Rectifier Corpora-tion. You may be the lucky winner who canchoose between a 28 day trip around the worldfor 1, or a 15 day trip to Europe for 2, with fullworld wide accident insurance protection pro-vided for duration of trip through BeneficialInsurance Group.
111
el=i2isttirle4 -s""'
INTERNATIONAL RECTIFIER 1964'ROUND THE WORLD CONTEST RULES:
ACT TODAY!1964 'ROUND THE WORLD CONTEST
INTERNATIONAL RECTIFIER CORP. / 233 Kansas Street, El Segundo, CaliforniaAdd a 4th line to this limerick:
1. Add a fourth line to the limerick: (judging will bebased on pertinence of your words, rather thantheir literary quality)
OF ALL THE REPLACEMENTSI'VE PUT TO THE TEST,INTERNATIONAL RECTIFIER
Date
2. Answer all questions on form and sign it. (Please Print All Answers)3. Remove label or box end from any boxed I.R. prod-
uct, or draw a free -hand facsimile of the I.R. trade-mark.
Name of my I.R. distributor
Distributor's address
City State4. Send completed entry form and I.R. label, box end,or trademark facsimile to INTERNATIONAL RECTI-FIER CORP., 233 Kansas Street, El Segundo, Calif. My distributor salesman
5. Answer as often as you wish. All entries must bepostmarked on or before April 30, 1964. Winner willbe selected and announced by International Recti-fier Corporation on May 18, 1964. All entries becomethe property of International Rectifier Corporation.
My name
My address
City State
Additional entry forms available from all electronic distributors.
=GR®-
INTERNATIONAL RporeTejfetikqAPRIL 1964
35
CTC 15 Color TV Chassis givesbrighter, sharper picture;
has greater reliability; is easier to service...than any previous RCA Victor Color TV Chassis!
RCA Victor's new CTC 15 chassis keepsall the performance -proved virtues of theCTC 12 . . . but adds these engineeringimprovements that should please bothyou and your customers:
The picture is brighter, better. It'sbrighter because a new design in thehigh voltage section (1) gives 30% morecurrent output at the same voltage. Thepicture tube circuits are designed foreffective use of this higher power.
It's sharper because the picture tubescreen voltages have been boosted . . .
giving a smaller, sharper dot pattern withless blooming. The video amplifier hasbetter phase response.
It's steadier because of substantiallyimproved vertical hold circuits.
A new picture "tone control"... it's avideo peaking switch (3) ... offers threechoices of picture quality: soft, normaland sharp. When snow and ghosts areyour problem, use the soft setting for asmoother, i lore ,!easing picture. Whenthe signal is better, make the most of itwith the normal or sharp setting.
Less color fringing results from a newclamp diode in the convergence circuitand rearranged controls are easier to use.
LF. R/GVERT.
R130
C
And UHF reception is improved by newcircuitry that reduces snivets . . . thoseblack vertical lines near the center ofthe picture.
Greater reliability ... longer compo-nent life. Heat build-up has been re-duced by housing the flyback trans-former and the regulator tube in sepa-rate compartments.
The horizontal output tube (4) isplaced on a raised "cooling shelf" out-side the H.V. compartment. Its positionallows free flow of air around its base.Three conventional tubes have been re-placed by novars (6). They run coolerand last longer. One of them is the hard-est working tube in the set-the horizon-tal output tube.
And dark heater tubes are used in allhigh-performance circuits.
To further increase life, the focus rec-tifier is specially designed for addi-tional life expectancy.
Easier servicing. Circuit tracing iseasier and faster . .. the new schematicsolid -line roadmaps (2) go point-to-point,and component labels are larger.
It's easier to service the high voltage
compartment . . . it has a hinged coverand better arrangement.
Color setup has been simplified by theaddition of a conveniently placed 3 -posi-tion bias switch (3) which accommo-dates wide variations of picture -tubecharacteristics.
RG controls (5) on the convergenceboard have also been rearranged foryour convenience. Now you use the en-tire top row to make adjustments accord-ing to the horizontal lines in a crosshatchpattern; the entire second row is for thevertical lines.
Color TV is the technician's big breadand butter business . . . for years tocome. We stand ready to help in everypossible way to make this fast-growingbusiness a profitable one for technicians-and for dealers as well.
See Walt Disney's "Wonderful World ofColor," Sundays, NBC-TV Network.
MIS MASTER'S VOCE'.
The Most Trusted Name
in TelevisionTmk(s)®
36 ELECTRONIC TECHNICIAN
Y78
W
-39'1, -F5cC
91")
4t
ADMIRAL
R501 2,78
5
J\J ISY PP
7.81:4 PP 1111r* Is.
Si "I 114 iFt a AL
VI10
SLIY5CKSNORIZ OSC
1.13".11,311. LY nr, 11-L31,1X I Y 11
9V PPL- -4.-1 -03V -
PC
)01L1.1:L.Vt num
Lir0 CD
5.11-moPETMcolO cm:A Lon !Kerr li19. MOISZI
TV Chassis C21A1-1A, -1E and C21A 1 0-1C Stamped Run 11-Improving Focus
The CRT in these receivers uses electrostaticfocus-with a 3 -position focus adjustment consistingof a small plug-in type patch -cord and three receptaclepins shown as "A," "B" and "C" on the manufacturer'sschematic. This is located at the bottom of the chassisnear the horizontal range, vertical linearity and verticalheight control mounting strip. To make the properfocus adjustment, connect plug-in focus lead to thereceptacle pin that provides best focus at the centerarea of the CRT. Contrast and brightness controlsshould be set for a normal picture. Caution: HighB -F is present at the focus terminals. Use care andavoid accidental contact with these terminals to pre-vent electric shock.
AIRLINE
AM/FM/Phone/TV Combinations, Models WG5914A, -6914A,-5944A, -6944A, -5974A and -6974A - Drive Cord Replacement
Drive cord replacement may be accomplished asillustrated here. Use a drive cord 431/2 in. long. In-stall the string as shown, winding three turns clock -
POINTER CLAMP
tiGANG CONDENSERIN FULLY CLOSEDPOSITION
DRIVE CORD
TENSIONSPRING
DRIVE CORD 43L"41.° DRIVE
1 SHAFT2
4093
(11:agel
Airline drive cord replacement schematic.
wise around the tuning shaft with the turns progressingaway from the chassis front. After the cord is installed,rotate the tuning shaft several times to take up anyslack in the cord.
DELCO
"Wonder Bar" Radios - Upside Down Operation
RS03 150K
VII120068
MAU OUTPUT
111/7v PP
"
Vt2II4f3
DAMPER
Bar" radio is operated upside down, it is possiblethat the tuner will scan only a small portion of theband, rather than the complete band. If you havea case on the bench where the entire low frequency endof the band is completely "missed" by the tuner, checkto see if the radio is lying in an upside down position.A portion of the band may also be missed when theradio is powered by a battery eliminator because ofa sudden voltage drop when the solenoid "hits." Infact, the tuner may just stick and never leave the highfrequency end of the dial. It is important to use aheavy duty power supply capable of 20 amp inter-mittent current on the 12 v range and to set the elim-inator at 16 v. Car batteries supplying only 12 vdo nicely because their voltage does not drop whenthe tuner solenoid energizes.
GENERAL ELECTRIC
TV Chassis "MW" - Production Changes
In all 23 in. receivers coded 117MW and abovethe value of CRT cathode resistor R176 was changedfrom 180K to 150K to increase CRT beam current. . . In chassis bearing code 125MW and above, theHV rectifier tube was changed from a 1J3 to a 3A3.This change necessitated an additional two turns offilament winding on the flyback transformer and anadditional series resistor in the filament circuit. Re-sistor R268 value is 3.6n, 1/2 w, wirewound. . . . Toreduce picture top bend, a 100 pf capacitor (C266)was added from pin 7 to the HO tube to the junctionof R263 R264 in the 6DQ6B grid circuit and wasmounted on the sweep circuit board. This change wasmade in 23 in. chassis bearing code 125MW andabove and in 19 in. chassis with code 127MW andabove. . . In chassis bearing code 128MW and above,the value of resistor R263 was changed from 820Kto 560K. This change was made to avoid over dis-sipation of the 6DQ6 grid . . . To improve currentdistribution, the VHF tuner RF B + supply circuitrywas changed. Resistors R181 and R312 were deletedand the value of R180 was changed from 15K, 4 wto 2.2K, 2 w. This resistor (R180) is now connectedfrom B + 135 v to the tuner RF B + input. To co-ordinate with this, the value of resistor R160 waschanged from 15 to 16 Mo. These changes are in-corporated in chassis bearing code 129MW and above.
MOTOROLA
Color TV Chassis T5908 - High Voltage Regulator Adjustment
Ij
TSO
It a 1960 or 1961 automatically tuned "Wonder Measure the high voltage at the 2nd anode with
APRIL 1964 37
TECHNICAL DIGEST
an accurately calibrated voltmeter equipped with ahigh voltage probe capable of measuring 30 kv. Ad-just R532 located on the left of chassis for a 2ndanode voltage of 24 kv. If a 30 kv probe is notavailable, adjust regulator as follows: Connect aVTVM across the high voltage regulator cathode re-sistor, R533. Set the brightness control to full counter-clockwise position to extinguish raster. With rasterextinguished, adjust control R532 to produce 1.2vdc ±-5% on the VTVM. Meter must be accurate towithin -±-5%.
PHILCO
TV Chassis, All 1963 "L" Line - Checking Horizontal PhaseComparer Selenium Diode
When troubleshooting TV receivers where a de-fective dual selenium horizontal phase comparer di-ode is suspected, here's a fast and efficient methodof checking them. A 20,00052/v meter is used. Withthe meter set on the 10K scale and with the probesmatching the diode polarity, the forward diode re-sistance should be a maximum of 600052. The ratioof the forward resistance of the diodes should be lessthan 2:1. With the meter set on the 100K scalemeter probes reversed to the diode, back resistanceshould be a minimum of 2M52. The phase comparerunit's diode center is common negative.
TRUETONE
Record Changer, Model 4008755-Set-Down Adjustment
Be sure the record changer is level. Place a 10 -in.record on the turntable. Turn the reject knob to the"Rej." position momentarily and let it return to "On"to begin the automatic cycle. After set -down has begun,but before the needle has touched the record, turn thereject knob to the "Off" position so that the turntablewill stop. Note: This step may be more easily per-formed while the changer is operated at 33 rpm. Placea ruler against the centerpost and measure the distance
LIFTADJUSTING.SCREW(10)
TONE ARM
SET-DOWNADJUSTINGSCREW (3)
Truetone record changer set -down adjustment.
between the near side of the centerpost and the needle.This distance should be between 4-10/16 and 4-11/16in. The set -down point is adjusted with set -down ad-justing screw (3). The tone arm will automaticallyset down properly on 7 -in. or 12 -in. records if theset -down adjustment is made correctly on a 10 -in.record. The set -down adjustment screw is accessiblethrough the hole in the left side of the tone arm.Turning this screw out (counterclockwise) moves theset -down point of the tone arm closer to the centerpost,and turning it in (clockwise) moves it away from thecenterpost. When the 10 -in. adjustment is correct,the needle should set -down between 5-19/32 and5-22/32 in. from the near side of the centerpost on12 -in. records, and between 3-5/32 and 3-1/4 in. on7 -in. records. Check the set -down point with eachsize record. Touch-up the set -down adjustment untilit has been optimized for all record sizes.
ZENITH
Royal 40 Transistor Portable Radio, Chassis 6KT5OZ1-ComponentReplacement
Resistors and capacitors should be replaced byclipping out the old part and neatly soldering in thenew. Heat the mounting lugs of larger componentswith a pencil type soldering iron and move lugs awayfrom the soldered connection with long-nose pliers ormetal pick. Continue heating lugs and brush awaymolten solder with a wire brush. Lift defective partoff chassis. Be certain that lug holes are open andfree of solder before mounting new component. Exer-cise care when replacing components.
SUBSCRIPTION SERVICECHANGE OF ADDRESS
Please include your ELECTRONIC TECHNICIAN address label to Insureprompt service whenever you write us about your subscription.
Mail to: ELECTRONIC TECHNICIAN Subscription Service Dept.Ojibway Building, Duluth 2, Minnesota
To subscribe: mail this form with your payment, and check:( ) new subscription ( ) Renew my present subscription
Subscription rates: in the United States:1 year, $5.00, 2 years, $8.00; 3 years, $10.00.Subscription rates for all other countries available on request.
ATTACH LABEL HEREIf you're moving, please let us know five weeksbefore changing your address. Place your magazineaddress label here, print your new address below.If you have a question about your subscription, placeyour magazine address label here and clip this formto your letter.
name
your job title or position
address
city zone stateL
38ELECTRONIC TECHNICIAN
Ififiriigard'sColortron Ante na
uvisforIfiers
Take your choice of Winegard's 2-nuvistor Colortron or single -
transistor Red Head antenna amplifiers - both great - both trouble -free!
Both work with any TV or FM antenna. Here's the story!
COLORTRON ANTENNA AMPLIFIER . . . ONLY $39.95 EXCELLENT FOR COLOR WON'T OVERLOAD TAKESUP TO 400,000 MICROVOLTS OF SIGNAL
FINEST ANTENNA AMPLIFIER MADE. . . Because the COLORTRON amplifiertakes up to 400,000 microvolts of signal input,strong local signals won't overload and causeinterference on distant fringe stations. It takes20 times more signal input than any transistorantenna amplifier and without compromisingits ultra low noise ability to pull weak signalsout of the snow.
A special "lifesaver" circuit gives the 2 nuvis-tors an expected life of 5 to 8 years. It's theonly amplifier that's completely weather-proof-nothing exposed, even terminals are pro-tected. Install it and forget it! Fits any TV orFM antenna.
Colortron Amplifiers are Available in 2 Models for TV
FOR TV-Model AP-200N-twin nuvistor, takesup to 400,000 microvolts, input 300 ohm,output 300 ohm, $39.95 list.
FOR TV-Model AP -275, twin nuvistor, takesup to 400,000 microvolts, input 300 ohm,output 75 ohm, $44.95 list.
RED HEAD TRANSISTOR MODEL . . . ONLY $29.95FOR COLOR AND BLACK & WHITE MOST RELIABLETRANSISTOR ANTENNA AMPLIFIER EVER MADE.
With the Red Head, you won't have transistor"pop -out" because of its special advancedcircuit that protects against lightning flashes,precipitation static and power line surges.Has high pass interference filter, 2 -set coupler,fully AC-no polarity problems. Tremendous-ly effective in remote areas where all signalsare less than 20,000 microvolts. Uses latestlow noise MADT transistor. Bright red am-plifier housing gives lasting product identifi-cation. The Red Head supersedes Winegard'sfamous MA -300 amplifier.
For TV or FM-Model No. RD -300, singletransistor, takes up to 20,000 microvolts, 300ohm input and output, $29.95 list.
Stereotron Amplifiers are Available in 2 Models for FM
FOR FM-Model AP -320, twin nuvistor, takesup to 200,000 microvolts, input 300 ohm,output 300 ohm, $39.95 list.
FOR FM-Model AP -375, twin nuvistor, takesup to 200,000 microvolts, input 300 ohm,output 75 ohm, $44.95 list.
Write for technical data or ask your Winegard distributor.
GET ANTXTRA BO OF OU ITY A ALUE FROM WINEGARD
"mega ANTENNA SYSTEM
There's a Winegard Quality AntennaReception Need
COLORTRON ANTENNA
Model C-44 Gold Anodized $64.95
1
COLORTRON ANTENNA
Model C-43 Gold Anodized $51.90
COLORTRON ANTENNA
Model C.42 Gold Anodized $34.95
COLORTRON ANTENNA
Model C-41 Gold Anodized $24.95
- - ci-cle 59 on post cardWINEGARD COMPANY 3019-E KIRKWOOD BLVD. BURLINGTON, IOWA
BEST PROFESSIONAL VTVM VALUE
EICO 232 peak -to -peak VTVMfeaturing exclusive Uni-probe S Pat
Deluxe VTVM for color & B & W
OWS'A,
Calibration without removing from cabinet Measure directly p -p voltage of complex & sine waves:
0-4, 14, 42, 140, 420, 1400, 4200 DC/RMS sine volts; 0-1.5, 5, 15, 50, 150, 500, 1500
(up to 30,000 volts with HVP probe, & 250 mc with PRF probe) Resistance ranges: 0.2 ohms to 1000 megs in 7 ranges 7 non -skip ranges on every function 4 functions: + DC Volts, - DC Volts, AC Volts, Ohms. Uniform 3 to 1 scale ratio for extreme wide -range accuracy Large 41/2" meter in can't -burn -out circuit Zero center for TV -FM discriminator alignment Smart professional styling-new satin finish etched panel
with contrasting knobs and meter and grey wrinkle steel case.Kit $29.95; wired $49.95.
Exclusive UNI-PROBE: (pat. pending) Terrific timesaver, performsall functions: A half turn of probe -tip selects DC or AC -Ohms
EICO KITS FOR 1964
EICO 460 WIDEBAND 5" SCOPE For color& black-andwhite TV servicing. Easily re-produces 3.58 mc color TV synchronizingburst. Vert. amp. flat from DC to 4.5 mc,usable to 10 mc; 25 my rms/inch sen-sitivity. Horiz. amp. flat from 1 cps to400 kc; 0.6 v rms/inch sensitivity. Auto-matic sync. Sweeps from below 10 cpsto 100 kc. Kit $89.95; Wired $129.50.
EICO 427 ADVANCED GENERAL PURPOSE5" SCOPE High sensitivity scope has allthe facilities and quality demanded forservicing audio, communications and in-dustrial equipment. Vert. amp. flat fromDC to 500 kc, -6 db at 1 mc; 3.5 myrms/cm sensitivity. Horiz. amp. flat from2 cps to 450 kc; 0.18 v rms/cm sensitivity.Automatic sync. Sweeps from 10 cps to100 kc. Kit $69.95; Wired $109.95.
EICO 430 PORTABLE GENERAL PURPOSE3" SCOPE Remarkably fine compact scope.Excellent for servicing audio, communica-tions, and industrial equipment. Ideal asa ham shack monitor. Flat -face 3" CRTwith mu metal shield eliminates affectsof external fields. Vert. amp. flat from2 cps to 500 kc, -6 db at 1 mc; 25 myrms/cm sensitivity. Horiz. amp. from 2cps to 350 kc, 0.25 v rms/cm sensitivity.Sweeps from 10 cps to 100 kc. Kit $69.95;Wired $99.95.
EICO 955 INCIRCUITBRIDGE -TYPE CAPACITORTESTER Unique shunt -resist-ance balancing* provision,permits in -circuit shortchecks even in the presenceof as little as 1 ohm shuntresistance. Sensitive opencheck down to 15 µµf nor-mally, adjustable to as littleas 5 µAL Wien Bridge capa-city measurements from 0.1to 50 µf. Kit $19.95; wired$39.95 *Pat. applied for.
.........
EICO 667 DYNAMIC CONDUCTANCE TUBE &TRANSISTOR TESTER Combines mutual con-ductance test with a peak emission test-givesa single reading of tube quality. Also spotsbad NPN and PNP transistors by gain and leak-age tests. New 1964 design has sockets andsettings for the latest receiving types, including5 and 7 -pin nuvistors. Also tests novars, 10 -pinminiatures, and compactrons, many low -powertransmitting and special-purpose tubes, voltageregulators, electron -ray indicators, etc. Multi -circuit lever switch; 13 tube -element pushbuttonswitches. 41/2" meter; roll -chart in snap -inwindow. Kit $79.95; wired $129.95.EICO CRU CRT ADAPTER-Adapts 667 to test allcolor and B & W CRT's. Wired $9.95.
EICO 369 TV/FM SWEEP GENERATOR WITH BUILT-IN POST INJECTION MARKER Feeds only thesweep signal to the circuit under test or align-ment. A demodulator picks off the responsesignal and feeds it to a mixer stage wherethe markers are added before scope display.Thus, troublesome interaction effects are eli-minated. Sweep generator has controllable in-ductor sweep circuit (all electronic) with nomechanical parts to wear and give trouble, and5 fundamental ranges from 3.5 to 316 mc.Variable frequency marker provides output on3 fundamental ranges from 2 to 60 mc., and60 to 225 mc range on harmonics. 4.5 mccrystal supplied for rapid check of markergenerator alignment. Kit 489.95; wired $139.95.
TOP-NOTCH TRANSISTOR TESTING TEAMEICO 1020 POWER & BIAS SUPPLY with 0.005% ripple. Con-tinuously variable metered output voltage, 0-30 VDC at 150 to300mA. Kit $23.95; wired $29.95.EICO 680 TRANSISTOR & CIRCUIT TESTER Measures basiccharacteristics of signal and power transistors. Provides DCcurrent, DC voltage (20K ohm/volt), and resistance rangesnormally needed for transistor work. Kit $25.95; wired $39.95.
Electronic Instrument Co., Inc. ET -4 I131-01 39th Avenue, Flushing, N.Y. 11352
Send new 1964 catalog featuring more than 230 EICO Products.
NAMF
ADDRESS
CITY 70N STATFAdd 5% in West J
40- - for more details circle 28 on post card
ELECTRONIC TECHNICIAN
ELECTRONICTECHNICIAN
APRIL 1964
4 Eageoe e. X)eldee
Project Engineer, Simpson Electric Co.
Speed servicing with a better understanding
of VOMs and by employing some
not -so -common measurement techniques
Many technicians take their testinstruments for granted. As a con-sequence, they do not take time tolearn to use them most efficiently.This is especially true with respectto that much -used instrument, theVOM.
Too often, when a new VOM ispurchased, the instruction manualis filed and rarely seen again. Thisis a mistake; much time and effortis expended in manual preparationand the information it offers canhelp you learn more about your
VOM and about applications otherthan standard voltage, current andresistance measurements.
If we listed all the things yourVOM can do, it would require afull-size book. Hence, we will re-view only some applications here.
Measuring Low Voltages
Most VOMs are capable ofmeasuring dc voltages well belowthe normal lowest voltage rangeprovided. The basic meter move-ment in a VOM is a current sensi-
APRIL 1964 41
tive device which-with the addi-tion of series resistors-is capableof measuring virtually any voltage.To add lower voltage ranges, how-ever, some knowledge of the basicmeter movement is necessary. Thisinformation is available in your in-struction manual.
A typical VOM meter move-ment requires a 50 /la current forfull scale deflection and has an in-ternal resistance of 200051. For thismovement the voltage drop acrossthe meter at full scale is 50 (pa)times 2000 (n) or 100 my. Byusing the meter directly, then, wehave a 0 to 100 my range avail-able. To provide a 0 to 1 v range,the total resistance must be 20,000-or 1 v divided by 50 µa. An18,00051 resistor (see Fig. 1) mustbe placed in series with the meterfor full scale deflection with 1 vapplied. The lowest voltage thatmay be used accurately is limitedby the meter's current sensitivityand internal resistance and the sizeof the meter dial or how well wecan interpolate between scale di-visions.
Measuring High Currents
Since the basic meter movementis a current sensitive device natu-rally we cannot add current rangeslower than the value of currentthat produces full scale deflectionunless we use an amplifier. Highercurrent ranges than those availableon your VOM may be added byemploying shunt resistors on themeter.
To add a 25 amp dc range toour 50 /la 200052/v meter we mustuse a shunt resistor that will have
a 100 my drop across it when 25amp are applied. The size of theresistor then is 0.1 divided by 25or 0.00452, which is then connecteddirectly across the 200051 meter(see Fig. 2). The wattage ratingof the resistor must be at least(25)2 x 0.004 2.5w. To makeresistors of this small value alength of copper wire heavyenough to carry the desired currentmay be cut to the desired resis-tance. To make a more accurateshunt-one not affected by temper-ature changes - Manganin wirecould be used.
Measuring High Voltages
A common requirement beyondthe VOM's normal range is theneed to measure high voltages intelevision receivers, scopes, radiotransmitters and special industrialelectronic equipment. Most VOMmanufacturers offer high -voltageprobe assemblies that extend theVOM's voltage measuring capabil-ity. In an emergency a VOM highvoltage probe can be constructedin the shop if certain precautionsare observed.
The probe assembly is nothingmore than a high -value precisionresistor matched to the VOM inputresistance. Let's consider a VOMwhose dc sensitivity is 20,0001/v.On the 2.5 vdc range the VOM'sinput resistance is 2.5 times 20,000or 50,00052. So, to measure 10,000v, for example, the input resistancemust be 10,000 times 20,000 or200 Mn.
If we plan to use our probe inconjunction with the 1000 vdcrange, (input resistance 20 Mn),
we will need a probe assembly witha resistance of 180 Mn. It is notnecessary for the probe resistor tobe a single unit. It may be madeup of a number of lower valuedresistors in series. What resistorsare available will dictate the mostpractical types to use in the high -voltage probe.
Resistors to be used should becarefully measured as nearly aspossible so the required resistanceis obtained.
The voltage handling capabilityof the resistor or resistors used isanother consideration. Remember,most of the voltage to be measuredwill be dropped across the resis-tance in the probe assembly.
Finally, we must consider theuser's safety. Most commercialprobes have ribs on the tip to pre-vent flashover from the voltagecheck point to the operator's fin-gers or the probe handle is ex-tended so that the user may placehis hand far back from the tip.These precautions are necessary;always use discretion when meas-uring high voltages.
To make high -voltage probesfor ac the same procedure is fol-lowed if the frequencies at whichmeasurements will be made arewithin the valid sensitivity rangeof the VOM. This information isreadily available from the instruc-tion manual.
Diode Testing
Germanium and silicon diodescan be quickly tested with theohmmeter section of your VOM.If you want to know what the di-ode polarity is, it will be neces-
18K n
50 pa2000n METER
I VOLT
Fig. 1-Series resistor add-ed to meter movementprovides 0-1 vdc range.
50 pa2000nMETER
Fig. 2-Meter is shuntedwith low value resistor toadd a 25 amp range.
LOW OHMSRANGEo+ -o
DIODE
HIGH OHMSRANGE+ -
DIODE
Fig. 3-Method used tocheck forward and back re-sistance of diodes.
42 ELECTRONIC TECHNICIAN
sary to determine how the internalbatteries are connected in theVOM. Again, the instruction man-ual contains this information.
Assume that the positive side ofthe batteries are connected to thepositive terminal or jack of theVOM. A good diode will have alow resistance in the forward di-rection and very high resistance inthe reverse direction. First set theVOM to the lowest resistancerange and connect the positive leadto the diodes anode and the nega-tive lead to its cathode (see Fig.3). The meter should read be-tween a few ohms and about 3000.Then set the VOM to the highestohmmeter range and reverse theleads to the diode. The metershould read at least 100 times theforward reading depending on thetype of diode. This test does notguarantee, however, that the diodewill perform as required in itsparticular application.
Testing Batteries
To properly test a battery itmust be loaded so it will delivercurrent just as it would in a circuit.Normally an "A" battery is ratedat 150 ma. Therefore, to properlyload a 1.5 v cell a 1 On resistorwould be placed across it (see Fig.4), and the voltage measured.Most catalogs and battery databooks specify the suggested cur-rent drain so that most batteriesmay be checked in this way. Whenbattery voltage falls below 80 or85 percent of its rated voltage itshould be rejected for use in ra-dios. Some applications, of course,
fl require closer voltage tolerance.
I 5V"A"BATTERY
Fig. 4-For accurate test ofbatteries a load resistor is
shunted across battery.
Expanded Voltage Scale
An expanded scale is one thatcovers only a portion of the volt-age you are measuring. This isuseful for detecting small varia-tions in voltage sources. For ex-ample, if it were necessary to ob-serve variations in a 24-v source,we could, by adding a bucking volt-age of 22.5 v, use the 2.5 v rangeinstead of the 50 v range (see Fig.5). By this method it is muchsimpler to observe small changesthat might go unnoticed on thehigher voltage range.
Measuring Capacitance
The instruction manuals formany VOMs contain explicit in-structions for measuring capaci-tance. The method used may varyfor different VOMs but a simplemethod that works with all VOMswill be shown here. Connect theunknown capacitor and a capaci-tor whose value is known in seriesacross a known ac voltage source(see Fig. 6). Measure the voltageacross the known capacitor, sub-tract this reading from the knownapplied voltage. The ratio of thecapacitors is then the inverse ofthe voltage ratios. For example, ifa 0.05 iLf capacitor was used asthe known unit, the 115-v line asan ac voltage source, and themeasured voltage was 50, then tofind the unknown capacitor'svalue, we would use the relation
C 50=
0.05 65or C is 0.039 µ,f. Do not use thismethod for measuring electrolytic
24V DC 722.5VSOURCE
TFig. 5-'Expanded scale' al-lows detection of small var-iations in voltage sources.
capacitors. They would be dam-aged by the applied ac. Also, becareful that the capacitors beingchecked have a high enough volt-age rating to withstand the testvoltage.
Measuring Power
Measuring the power dissipatedin a dc device with a VOM is asimple matter. First measure thecurrent through the device thenthe voltage drop across it. Thepower dissipated in watts is theproduct of the current in amperesand the voltage in volts. A slighterror may result because of insert-ing the ammeter in the circuit, withthe added resistance due to theVOM the current may drop slight-ly. In this case use the highestcurrent range that will give an ac-curate reading since the internalresistance is lower on the highercurrent ranges.
Power may be measured in accircuits in the same manner ex-cept that the result will be in volt-amperes unless the power factor isunity. To determine ac power inwatts the power factor must beknown.
These are only some of theadded uses for your VOM. Ingeneral service work the VOMwith all its ranges is a valuabletool in itself. However, familiar-ity with your particular tester andsome experimentation is sure tolead to many more uses for yourVOM.
Understanding your test equip-ment is one very important steptoward speedier service and higherprofits.
KNOWN ACVOLTAGE
Fig. 6-Your VOM can beused to determine an un-known capacitance value.
APRIL 1964 43
EXTRA PROFITS WITH
You can tap extra profits by installingrear seat speakers. Many techniciansharbor the opinion that rear deckspeakers are difficult or bothersome toinstall; nothing could be farther fromthe truth. They're simple, easy, takeless than an hour to install and areloaded with extra profit. This isespecially true if you schedule themduring slow periods.
The only extra hand tools neededwhich you may not already have are a1 in. chassis punch and a % in. drill bitwith a 1/4 in. shaft if you have a stan-dard 1/4 in. drill.
Because all late model cars comewith speaker mounting holes alreadystamped in the rear deck these tools areneeded only on the older cars.
If an older car comes in just punchthree or four 1 in. holes close togetherand mount the speaker over them.
The photos and captions show detailsof the eight easy steps to extra profits.The car here is a 1962 Chevrolet but istypical of most installations.
STEP 3
STEP 6
Many easy - to - installspeaker kits are on themarket. This one has aFront, Rear or Both switch;faders are also available.
Door stripping and back seat are re-moved.
The cardboard top of the rear deck, iscut to the shape of the stamped speakermounting holes.
44 ELECTRONIC TECHNICIAN
Cl
REAR SEAT SPEAKERS
STEP 1
STEP 4
STEP 7
The glove box is removed to get at thespeaker wires.
Speaker wires are routed under thecarpet.
The speaker is mounted and ground wireis put on. Drill a 1/8 in. hole in anymetal part of the car body and put a lugon a self -tapping screw and tighten.
STEP 2
STEP 5
STEP 8
Remove the side panel, right side, frcntseat, so the wires can be run in behind.This one is held in with two screws.
The sound insulating material is takenfrom under the rear deck in the trunk. Afew clips hold it in. Reinstall it after thespeaker is mounted.
Speaker switch or fader is mounted underthe dash. Over the transmission hump isusually best. All panels are replaced.You pocket the profits.
APRIL 1964 45
AVOIDING PITFALLS
IN TRANSISTOR TESTINGKnow the important facts about
semiconductor characteristics and get
efficient service from your transistor
and diode test equipment
LIMITING 50paRESISTOR
4 2Uileiciot Ozto#American Electronic Laboratories, Inc.
Transistor and diode specifica-tion sheets usually contain maxi-mum information about a particularunit. This information is especiallyvaluable to TV -radio technicianswhen testing, troubleshooting andselecting replacement units. And ifyou know how basic test equipmentcircuitry operates and how it isused, you'll eliminate a lot of yoursemiconductor testing problems.
Unit Types
Entertainment type transistorsand diodes-those used in radios,
VTVM
Fig. 1-Circuit for
measuring ICBO
ELECTRONIC TECHNICIAN
amplifiers, TVs, etc., can be brokendown into five categories as follows:1) low power, low frequency(audio); 2) medium and high pow-er, low frequency (audio); 3) lowpower, high frequency (video, RF);4) diodes and rectifiers; 5) zener(reference) diodes.
Certain basic characteristics-leakage measurements and forwardvoltage measurements-are com-mon to all transistors and diodes,and these parameter measurementsare considered of prime importancein detecting unit degradation.
Audio Types
Two important transistor charac-teristics in this group are 'CD) andhFE. Tom, is the dc collector currentwhich flows when a specified volt-age is applied between the collectorand base electrodes of the transistorand the emitter is left open cir-cuited. The small -signal, short-circuit, forward -current transfer ra-tio, commonly known as the com-mon emitter current gain of Beta,is the ratio of the ac output to theac input current, with zero as out-put voltage. When measuring lowfrequency units, this measurement ismade at a frequency of 1 kc.
Typical Test Circuitry
The schematic of a basic circuitIcB0 measurement circuit is shownin Fig. 1. An adjustable dc constantvoltage power supply is used as apower source. If the power supplycan deliver a maximum of 100 ma
at 30 v, it can be used for allmeasurements specified here. Thenegative terminal of the power sup-ply is fed into a series limiting re-sistor. The series limiting resistorprevents damage to the meter andtransistor if the incorrect polarityis inadvertently applied to the tran-sistor. A 0 to 50 pa meter is placedin series with the limiting resistorand the collector electrode. Thebase of the transistor is then re-turned to the positive side of thepower supply. A VTVM with aninput impedance of 10 MS/ isplaced across the collector to baseelectrodes. The series resistor canbe chosen from Ohm's Law:
VR - -
Iwhere V is the specification voltageand I is the full scale meter move-ment or 50 µa.
The method of measurement is asfollows:
1. Insert the transistor to betested in the socket.
2. Adjust the supply voltage un-til the VTVM reads the specifica-tion voltage at which 630 is to bemeasured, then read IcBo on the 0to 50 Ata meter.
HEE Measurement
A schematic of a typical hFEmeasurement circuit is shown inFig. 2. A 1 kc signal generator isused to supply the signal source tothe transistor. R1 is a constant cur-rent resistor. L1 offers a high im-
pedance to the 1 kc signal and alow resistance return for the com-mon base dc bias. SW1 is a switchused to calibrate the jig for a hFE=1 condition. R2 is a constant cur-rent resistor which, in conjunctionwith the constant voltage supplyV1, delivers a constant emitter cur-rent to the transistor. C1 and C2are capacitors used to bypass the 1kc signal to ground. M1 is a 0 to 10ma meter and is used to set theemitter current to a specified dcoperating point. R3 is a sensing re-sistor used for the current gainmeasurement. Constant voltagesource V1 supplies the specified dccollector to base or collector toemitter voltage. The VTVM shownacross R3 should have millivolt sen-sitivity; if it doesn't, almost anyaudio amplifier can be used toamplify the 1 kc signal appearingacross R3 so it can be properlyread.
The method of measurement isas follows:
1. Without a transistor in thesocket and zero voltage applied,close SW1 and adjust the amplitudeof the 1 kc generator until a 0 dbreading appears on the VTVM.Open SW1. As small a signal aspossible should be used to preventclipping when the transistor is in-serted in the socket. The test jigis now calibrated and should notrequire calibration unless the am-plitude of the 1 kc generator ischanged.
2. Insert the transistor to be
I MEG
RI
011-VCB
SW- ICALIBRATE
VCE
SIGNALGEN z
LI 7+150pf
CIIKC -
IMI50V
VI
R23K C2
TO 50V
0-10 =+ma PRESS 50 of V 2
TEST
R3100a
O VTVM
Fig. 2-Circuit formeasuring h11 at 1
kc.
APRIL 1964 47
PITFALLS IN
TRANSISTOR
TESTING
Continued
tested in the socket and adjust thevariable constant voltage source V2to the specified VCE or VCB as readon a VTVM.
3. Adjust the variable constantvoltage source V, until the specifiedemitter current is read on M,.
4. Press the PRESS TO TESTswitch SW2 and read the currentgain hFE directly in db on the meter.The PRESS TO TEST switch is usedso that the capacitor Cl will notmaintain a charge and damage an-other unit when it is inserted inthe socket.
Audio-Low Frequency
Two transistor characteristics thathave been selected as having pri-mary importance in this group areIeR0 and VEBF VEBF is the emitterfloating potential and is that voltageappearing between the emitter andbase junction (with the emitter andbase open -circuited) when the col-lector to base junction is reversebiased with a given potential.
The same circuit configurationas that shown in Fig. 1 is used tomake the IcB0 measurement. Theonly required changes are in thevalue of the meter and the limitingresistor. The meter should bechanged to a value somewhat largerthan that specified for the type oftransistor to be tested and the valueof the limiting resistor should bedetermined as for 'cm.
The method of measurement isas follows :
1. Place the transistor in socket.2. Adjust the supply voltage un-
til the VTVM reads the specifica-tion voltage at which IcB0 is to be
Fig. 3-Circuit for measuring VEBF.
measured, then read the Ion° directlyon the meter.
A circuit used for determiningwhether or not a transistor meetsthe VEBF specification is shown inFig. 3. The collector to basejunction of the transistor is reversebiased by the constant voltagesource V1. This voltage is shownbeing measured by a VTVM, how-ever any voltmeter can be used tomeasure this voltage. VTVM isplaced across the emitter to baseterminal of the transistor. Thismeter must have an impedance of10 Mr to prevent loading down thetransistor.
The method of measurement is asfollows:
1. Insert the transistor in thesocket.
2. Adjust the collector to basesupply voltage to that as specified.
3. Read the emitter floating po-tential on VTVM No. 2. It shouldbe lower than that voltage given onthe specification sheet.
Video, RF Types
Two transistor characteristics thathave been selected as having pri-mary importance in this group areICB0 and hFE (1 kc).
The same circuit configuration asthat shown in Fig. 1 is used to makethe IcBo measurement. Since thesetypes of transistors have similar dccharacteristics as those of the lowpower audio units, the ICB0 meas-urement is made in the same man-ner as previously described.
The same circuit configurationshown in Fig. 2 is used to make the1 kc hFE measurement. These types
of transistors also have similar lowfrequency characteristics as thoseof low power audio units and there-fore the 1 kc hFE measurement ismade in the same manner as pre-viously described.
Diodes and Rectifiers
Two diode and rectifier charac-teristics have been selected as hav-ing primary importance in thisgroup. They are IR and VF. IR isthe current which flows in the anodeand cathode terminals whenfied reverse voltage is applied be-tween the anode and cathode ter-minals of the diode or rectifier. VFis the voltage appearing between theanode and cathode terminals whena specified forward current is passedthrough the diode or rectifier.
The basic circuit configuration ofFig. 1 is used to measure IR. Thecollector of the transistor shouldbe replaced by the anode of thediode or rectifier and the base of thetransistor should be replaced bythe cathode of the diode or rectifier.The current range of the metershould be selected so that it isslightly higher than the IR specifica-ton limit of the unit to be tested.The value of the protective resistorshould be derived as previouslyshown for Icno. The method ofmeasurement is also identical tothe method previously describedfor 'cm).
It should be pointed out that theIcRo measurement is a dc measure-ment of the collector -to -base diodeof a transistor and hence is treatedin the same manner as any otherdiode.
48ELECTRONIC TECHNICIAN
Fig. 4-Circuit for measuring
The schematic in Fig. 4 is usedto measure the forward voltagewith a variable constant voltagesource. R4 is a limiting resistorwhich protects the meter againstshorted devices. Its value shouldbe selected as previously describedfor IcBo. Since the diode in theforward direction has low imped-ance, the VTVM could be replacedwith a 20,000It/v meter if desired.
The method of measurement isas follows:
1. Insert the unit to be testedin the socket with the anode andcathode as shown in Fig. 4.
2. Adjust the constant voltagesupply until the specified current
read on the milliammeter flowsthrough the unit.
3. Read the forward voltage di-rectly on the VTVM.
Zener Diodes
The zener diode characteristicselected as having primary impor-tance in this group is the referencevoltage EB. EB is the voltage ap-pearing at the diode terminals whena specified current is passed throughthe unit.
The same circuit configurationshown in Fig. 4 is used to make thereference voltage measurement. Themeter's current range should beselected slightly higher than the
SET UPAND DEAL
"I'm sorry ma'am, but I wouldn't recom-mend repairing this set. The repairs wouldcost more than the set's worth."
"Well, I'll talk to my husband, but I guessyou're right. By the way, since you get tosee so many types of TV sets at their worst,which would you recommend we buy toreplace this one?"
How many times has this happened toyou-you sell a new TV set but somebodyelse makes the profit-simply because youregard your job as "service only"?
Almost everybody would like you for a
specified current. The protectiveresistor's value should be derivedas previously specified for IcBo.
The method of measurement isas follows:
1. Insert the unit to be tested inthe socket.
2. Adjust the constant voltagesupply until the specified current asread on the milliammeter flowsthrough the device.
3. Read EB directly on theVTVM and it should fall within thespecification limits of EB.
Results of these measurementscan indicate unit degradation andeither poor performance or failurecan usually be detected. Manytechnicians today are using ohm-meters to determine whether or nota transistor is good or bad. Thisis a dangerous practice, for the con-ventional type multimeter can sup-ply current as high as 150 ma andpower of 50 to 60 mw on its lowerranges. When used on the higherranges where the current is limited,it may be used as a go, no-go de-vice. That is, it can be used totell if a unit is open or shorted.The conventional type ohmmetergives no indication of device degra-dation, however, and it is notrecommended as an instrumentwhich technicians would normallyuse for transistor testing.
dealer-and in most cases it's pretty easyto arrange. Simply contact the distributorof the set you'd like to handle! If thereisn't a distributor in your area or if youaren't sure who he is, write the manufacturerdirectly.
If you now do "service -only," it wouldbe worth your time to investigate sellingnew sets. In many cases you're there whenthe owner decides to buy a new TV. Howmany times have you been asked about "thebest set" and stepped aside to let someoneelse make the sale?
APRIL 1964 49
Many technicians and dealersviolate the basic rules of salesman-ship in the classified telephonedirectory.
You can see this simply by turn-ing to the "Television Dealers andService" heading in virtually anytelephone book. Chances areyou'll find an essential samenessin most of the ads. Prospects whoare confronted by them, usuallyhave no particular reason-otherthan whim-to choose one shopover another.
Buying habits surveys show thatlarge and increasing numbers ofpeople turn to the classified tele-phone directory when they areready to buy or when they needservice. These studies indicatethat the combined radio and tele-vision headings are referred tomore often than any other classifi-cation in the book. Content witha "share" of the business it at-tracts, many technicians and deal-ers fail to take full advantage oftheir advertising investment.
Another possible reason for lackof sales appeal in directory ads isthat many advertisers fail to recog-nize the directory's "split person-ality." On the one hand, it is anumber service that gives yourregular customers quick and easyaccess to you when they need yourservices. This function is servedprimarily by listings under thebrand names or headings that de-scribe your products or services.
But it is also an advertisingmedium. Its larger units and dis-play ads can be your last chanceto convince the uncommittedready -to -buy customer to call yourather than a competitor. Its jobis not merely to give your addressand telephone number and to listyour brands and services, but tosell.
To make an ad that sells, keepthis distinction between numberservice and advertising firmly inmind. Then, avoid these all toocommon seven deadly sins:
TELEPHONE Sin #1-Letting George Do It:Too many technicians and servicedealers "take" an ad, rather than"make" one that sells. They turnover the job to a salesman, or anagency. Then they wash theirhands of all responsibility for itseffectiveness.
No one knows your business asthoroughly as you. If you can af-ford it, or if a service is offeredfree, take advantage of the know-how of professionals. But helpthem make a better ad by tellingthem the advantages your shop of-fers, and by insisting that your adbe designed to sell. Sin # 2-Selling Yourself, NotYour Services: Your prospectsdon't give a hoot about your shop-only about what it offers them.So sell your services, not yourself.
Instead of approaching your adwith the idea the "we do this" or"we offer that," think in terms of"you'll get this" or "you'll enjoythat."
By speaking directly to yourcustomer ("as you"), rather thanof yourself ("as we"), you'll findthat your advertising automaticallywill pack a more potent salespunch, even if the "you's" are im-plied, rather than stated.
Bear in mind, too, that the cus-tomer you want to attract is theone you don't have. Your presentand past customers, and eventhose who are referred to you, arealready largely sold. When theyturn to the Yellow Pages, theywant the most basic facts: yourtelephone number, your location,your hours and your name (if theyhave forgotten it momentarily).When new prospects turn to theRadio or Television Dealers andService classifications, they wantfirst to be sold. They want all thereasons why your service willplease them. An advantage -full addesigned for new customers willreach and re -sell old ones as well,so it pays to make it a selling ad. Sin #3 - Headlining Your
DIRECTORYName: This most common sin issymptomatic of the "we" ap-proach. The top spot in your adbelongs to a selling message. Yourname alone will ring a bell onlywith customers who have beenwell served by you before.
Think how much more appealyou can get from a headline thatemphasizes benefits, savings oftime and money, speed and con-venience. For instance: "The helpyou need is practically there. . .""Fast TV Repair-Any Time,Any Day" . . . "No Extra Chargefor Night Calls" . . . "EmergencyService-All Makes" . . . "Guar-anteed Repairs" . . . "Save Money-Drop Off Your Set for Repairs"-or the old standby, "Save Time,Save Money."
These selling points and otherslike them appear in many ads. Thetrick is to make one or two ofthem dominant to catch the read-er's eye immediately, then to sellhim by backing up the headlinewith other advantages and facts.
Your name should be highlyvisible, of course. But unless itis an integral part of a sellingheadline, it should be relegated toa lower spot in your ad, alongwith your equally visible telephonenumber. Sin # 4-Putting all Your Eggsin One Basket: Never try to sellevery item in your shop and all ofyour services in one small space.Instead, focus your ad on specificservices or sets that belong underthe heading in which your ad ap-pears. Selling radio sets or phono-graphs under the heading Tele-vision Dealers and Service is large-ly a waste of space-and money.If they are important enough toadvertise, give them the space theydeserve under the proper heading.If they are not, don't clutter yourad with facts that few customerswould look for under that classi-fication.
The wide variety of listings andad sizes available for increasing
tt
46
p
50 ELECTRONIC TECHNICIAN
ADVERTISINGyour opportunities to sell arelimited only by your budget andyour business goals. In some cases,plain or bold faced listings, andlistings under trade marks, will do-especially in classifications hav-int few or no competitive displayads. In others a small display ador informational listing can do thejob of attracting extra business foryou. Your decisions should beguided by (1) how important theservice or product is to your totalbusiness and (2) how strong yourcompetition is under any heading. Sin #5-Making Any Illustra-tion Do: An illustration will helpto attract attention, but it shouldsupport your selling message,rather than compete with it. Somedealers and technicians seem satis-fied with almost any illustration;chipmunks, monkeys, dwarfs andimps cavort in too many ads.
If your intention is to conveyfriendly, dependable service, aphoto of yourself and your staffcan personalize your appeal. Ifspeed of service is a major appeal,your radio -equipped fully -stockedtruck can be shown, if the photois attractive and ties in with themessage in your headlines. If yourshop itself is especially inviting andyou want to attract walk-in trade,you can show it, although this isamong the weakest of visual ap-peals, symbolizing the "we" ap-proach. The only value of a shopphotograph is that it may remindcustomers that they passed yourshop once before.
Check your local phone bookbefore you decide on an illustra-tion. If there are too many car-toons of ailing television sets orradios, forego this type of illustra-tion. Make your ad stand out byits different and attractive layout,its strong sales appeal and the logicof illustration. Sin #6-Playing "Hide andSeek" With Your Customers: Peo-ple turn to the Yellow Pages forhelp. Be sure you give it to them.
Eliminate your 'non -selling' ads by knowing
the seven sins of Yellow Pages advertising
If you want them to come to you,tell them precisely where you arelocated, not only by including youraddress, but by adding other di-rectional aid, such as "Across fromCity Hall," or "West Side Shop-ping Center." A small map show-ing your location in relation tomain thoroughfares or other land-marks will also be a help to new-comers.
If you offer round-the-clockservice or remain open at hoursunusual for business in your area,say so with a line such as "OpenTill 9 p.m. on Fridays," or "8a.m. to 9 p.m., Mondays throughSaturdays," or "24 -Hour Service."
If you offer sales or service onall makes, say so. If not, list thoseyou do handle. Or better still,show the trade marks if there arenot too many. And tell them if yourepair and install antennas.
It is surprising how much infor-mation you can get into a displayad without clutter if you "weight"your copy by using larger type forthe most important items, andsmaller, lighter type for the lesserelements. Again, your ad will beread to the last word if your head-line has done its job well, and ifeverything in your ad is appropri-ate to the classification. Sin #7-Letting the PhoneRing and Ring: Many YellowPages users ask questions first, buylater. Don't let poor telephonehabits limit your sale, or worse,turn them away.
Train yourself and everyonewho answers your phone to beprompt, to be cheerful, to be help-ful, to ask and use the customer'sname, to mention special servicesand confidence - building guaran-tees, and to suggest other waysthat you might serve them. Salescan start in the Yellow Pages, butit is up to you to turn first-timecallers into regular customers. Youcan do this by avoiding these sevendeadly sins-by working -up adsthat sell.
APRIL 1964 51
Bob looked up from a sche-matic he was studying just as hisbuddy walked into the shop. Heburped a "Hi, Joe," turned andpropped his chin with his arm rest-ing on the VOM near a TV chassisand stared into the set's chassis.
"You look tired," Joe mumbled,"it's quitting time anyway, whydon't you close shop and have abeer with me at the Tavern?"
It was customary for the twoboys to have "a beer" almost everynight, so the question really wasn'tnecessary. Normally when Joe ap-peared, Bob would methodicallystraighten the papers on a tablenear the phone, throw a couple ofnight -light switches, the mainswitch on his bench and withoutfurther hesitation head for theTavern with Joe. Tonight it wasdifferent. . . .
Joe was still attending the localstate college and was in his lastyear of hydraulics engineering.Bob had opened the TV shop rightafter graduation from tech school.
Joe could define a Farad or aCoulomb in precise terms but be-came lost rather easily in a sche-matic. He marveled at Bob'sability to repair almost any TVset in a matter of minutes.
"Let's go!" Joe prodded."Why don't you go ahead and
I'll meet you there a little later?""What's wrong, Bob, you stuck
to that stool?""No," Bob laughed, "this Emer-
son's got a real loose vertical holdthat's giving me fits. I've been at italmost two hours and I'm not anycloser now than when I started."
"I know what's wrong evenwithout looking at it," Joe saidseriously, "you've been hard at itall day and your mind isn't work-ing right. Come on and get a beer.With a fresh mind in the morningyou can fix it in ten minutes."
" 'A beer' to you is a whole case.Really, Joe, this is a 'dog.' I just
By Gosh,1,1 Salem
You're Right!Bob demonstrates that even the best technicians
run into an occasional 'brick wall'
with vertical sync problems
need to concentrate on it a littlelonger."
"Maybe I can help," Joe volun-teered. "I know basically how thevertical section works, and ifyou'll straighten out some of therough spots for me, maybe I'llcome up with the solution to yourdilemma."
"Four years of college hasn'tmade you that smart," Bob jibed,"but I'll be glad to point out wheremost technicians go astray."
Different Kinds of Sync Trouble
Bob knew that Joe understooda lot more about the operation ofa TV set than he let on-he beatBob in chess all the time too, sohe had to be pretty smart. Andreasoning so, Bob skipped the pre-liminaries and went right into theheart of the matter.
"There are several differentsystems used to sync the verticalsweep," Bob started, "but they
52 ELECTRONIC TECHNICIAN
all exhibit some basic symptomswhen they malfunction. Of course,these symptoms should be used asclues to show where to look forthe trouble.
"Anybody with half a brain willsubstitute tubes in the path of thesignal before starting, so we'll as-sume that any problem I mentionis a circuit problem."
"What do you mean by 'in thepath of the signal' ?" Joe queried.
"I mean just that-any tube thateither the composite signal or thestripped vertical signal passesthrough should be held suspectuntil the tube has been substi-tuted."
"Do you mean even an IF tubecan cause loss of sync?"
"Right," Bob countered. "Alittle gas or a cathode -heater shortin one of the IF tubes can, in rareinstances, cause 60 cycle modula-tion upsetting the vertical withoutaffecting the video, horizontal orsound signals. Generally, however,the video will suffer too.
"There are different kinds ofsync trouble which require differ-ent kinds of treatment too."
"Sounds like double talk; eluci-date."
"Well, first, there's the no -ver-tical -sync condition. The hold con-trol slows the rolling down and willreverse the direction of the rollingor even stop it, but the verticalwon't lock in. Then there's thecondition that is usually an oscil-lator defect. The picture can beslowed but continues to roll in the
same direction. And, of course,there are intermittents. The worstkind is what you see here," Bobdemonstrated with the controls onthe Emerson that the set wouldlock in when the hold was care-fully adjusted but that it still lostvertical hold rather easily.
"Maybe the slots around theedge of the picture tube aren'tdeep enough to hold the sync barin tight," Joe kidded, "maybe it'sthe picture tube."
"Huh? Oh, I thought you wereserious for a minute. But youknow there are cases where a pic-ture tube can cause sync trouble.And it's usually the last place atechnician thinks of looking."
"Did you check the picturetube?"
"No, this set doesn't have a re-trace circuit which can cause atrouble like that."
Bob pulled a large notebook offthe shelf adjacent to the bench andleafed through a few Tekfax sche-matics. He stopped at a G -E sche-matic, partially shown in Fig. 1.
"Now here's one that can causethe kind of trouble I was talkingabout. You see, retrace blankingis actually accomplished by liftingthe signal out of the primary sideof the vertical output and applyingit to the grid of the CRT. Thenegative pulse on the grid of theCRT cuts off the beam during re-trace. As you can see, a short atthe grid or gas in the CRT wouldbe reflected in the vertical feed-back circuit."
68K 56K
LIN
220K
B BOOST
68K
10K
LOOK 1.015
.027 100 n
""AITC
3900pf >IM
--il000TNf
Bt
1; CRT
SPARKGAP
YOKE
1000
0--111
CRT malfunction in this set can cause sync instability and a variety of other vertical prob-lems.
"It looks to me like you not onlyhave to check tubes in the pathof the signal to the vertical sectionbut away from it as well. How inthe world do you know which sec-tion is connected in some way toanother section?"
"Well," Bob started slowly, "onsome sets, you just know-youknow because you've worked onenough others like it. If you'reworking on a stranger like this one,you've got to read the schematic."
Bob pulled the schematic outfrom under the edge of the TVchassis and motioned Joe over tohis desk. Normally Bob used adiscarded music stand to hold hisschematics, but Joe noticed that itwas near the bench at the oppositewall today. After moving a fewarticles on the desk, Bob laid outa Tekfax for the Emerson.
Common Circuits
"Let's look at some of the thingsthe vertical section has in commonwith other sections of the set."
"You mean like B + ," Joe in-jected.
"Right again. And this is a verygood place to start looking. Sincethe vertical section's operation iscritical, it may be the first to beaffected by low B + . After youmeasure the voltage, however, it'salways a good idea to scope theB + . Then if there's any modula-tion or ripple on it, you'll see it."
"Other than 60 cycle gettingthrough from the line, what elsecan modulate the B + ?" asked Joe.
6EM7
2 2M
YOKEII=
1 CRT
11000 pf
B 0047 122K
100 of 27K 7022
Circuit employed in the Emerson for retraceblanking makes sync problems caused byretrace circuit unlikely.
APRIL 1964 53
4.5 MC
"One of the worst offenders isthe horizontal output tube. Eachtime the output tube conducts, theB + is loaded and is modulatedat the horizontal rate. This getsinto the vertical section, trippingthe oscillator slightly ahead of thesync pulse. This usually causes arapid but spasmodic roll."
"Well, that's easy enough to un-derstand. What else can goof upthe B + ?"
"What else draws heavy cur-rent intermittently?" Bob returnedthe question.
"How about the audio section?"Joe inquired.
"On the nose. When audiocauses the output tube to drawheavy current, it can modulate theB +. I know what your next ques-tion is going to be; in almost everycase, if the filter capacitor were ingood shape, there wouldn't be anymodulation problems. Does thatanswer your question?"
"Yes, Houdini. I think thatcovers it," Joe answered in mockdisapproval. "How far have yougotten on this set?"
"After substituting tubes, Ichecked the B + and then startedscoping the vertical circuits. Atfirst, everything looked perfectlynormal, but when I went over ita second time, I found that thevertical pulse reaching the oscilla-tor was a little shy of what theschematic shows is normal anda little too pointed."
"Then what?" Joe wanted toknow.
"I checked all around the videoamplifier," Bob continued, "but Istill can't find anything wrong."
"I still say it's the picture tube,"Joe kidded again. "Let's go get abeer."
Ignoring him, Bob started tocheck voltages on the video am-plifier again. He shook his headin disgust when he found they werenearly exactly what the schematiccalled for. Bob hooked the scopeprobe on the grid of the oscillatorwith a decoupling probe andwatched the oscillator feedbackpulse slip by the sync pulse as ifit weren't there. He held the probetight with one hand and pulled offthe picture tube socket with hisfree hand. The two pulses snappedtogether.
"By gosh, you're right!" Bobshouted. "It is the picture tube."
"I knew it all the time," Joechortled, "haven't I been tellingyou?"
"I'm serious." Bob pulled Joeto the scope by his shirt sleeve."Look."
Bob plugged in the CRT socketagain with the scope still hookedto the oscillator grid. The tubestarted to warm up and the twopulses bumped together and pulledapart intermittently.
"You're slipping," Joe chided."I thought you said the picturetube wouldn't cause a malfunctionlike that on this set."
"Anything is possible, Joe. Let'scheck the CRT and see what'swrong with it."
Bob pulled his new combinationCRT tester and rejuvenator from ashelf where he kept equipment thatwas not used on every bench job.He worked quickly and silently.
"That's funny, no shorts."Bob reset the tester and gently
tapped the neck of the CRT thistime as he watched the neon shortindicator. Still no short indication.He flipped the function knob totest for emission.
VIDEO
SOUND AMP
Gassy CRT caused in-termittent verticalsync.
SYNC AGCSEP AMP
270v
"Emission's a lot better than theaverage picture tube," Bob mum-bled.
For the first time Joe had be-come intent on the problem. Bobflipped the function knob on thetester to GAS.
"There's the answer," Bob an-nounced. "That tube's so gassyit must be pressurized."
"You still haven't explainedhow the CRT could affect thevertical sync in this set. Howabout it?" Joe noticed that Bobhad lost his worried look andimagined that he had figured outwhere he had strayed in histroubleshooting procedure.
"I overlooked a connection that'scommon to the sync and thepicture tube in almost every TVset," said Bob. "When the synctake off point is beyond the videoamplifier, a gassy CRT can causesync compression at the plate ofthe video amplifier."
"There should be an easier wayto check it than that," Joe blurted.
"There is. Quite frankly, whenI had the scope probe on the oscil-lator grid, I didn't know what Iwas looking for. But when Ipulled the socket on the CRT andsaw the oscillator sync in, I knewit was the CRT.
"Normally, if the scope is con-nected to the video amplifier plate,like this," Bob connected thescope probe as he continued, "wecan watch the effect the CRT hason the vertical sync pulse by con-necting and disconnecting the CRTsocket."
Joe watched intently as Bobpulled the plug off the CRT again.The sync pulse broadened and in-creased in amplitude slightly.
"OK, wise guy," Joe grinned,"what if the set is a series stringjob?"
"Very simple," Bob offered pro-fessionally. "You can plug in aseries type booster into the CRTsocket when you unplug the tubeand the booster transformer willcomplete the circuit."
Bob had left the schematic onthe bench and turned on the nightlights as he spoke.
"Let's go!" Bob mimicked."The boys at the Tavern may havethe police out looking for us."
54 ELECTRONIC TECHNICIAN
There's Money in
The primary and logical reason why you are inbusiness is to obtain more money and certain personalbenefits from your efforts that you could not get byworking for someone else.
To justify your reasons for being in business,your business has to stay out of the red and it has tokeep abreast of fast moving events in a rapidly chang-ing society. To do this, you've got to compete! Reallycompete. And this means using your head-to generateideas.
Now this wouldn't be a problem if you had a pileof `moola' to buy TVs or parts in car -load lots; or payfor display advertising by the 'gobs.' But what one -or two -man shop can compete in this manner withsome service -dealer organizations who can buy in joblots?
You can compete with any shop, however, re-gardless of size, with ideas. The right idea, or com-bination of ideas, can put thousands of additionaldollars in your pocket. This isn't an exaggeration. Alsothis doesn't mean your idea has to be world shattering.More often than not the profitable idea is a warmed-over `chestnut'-a new slant on an already existingconcept. The idea can be for faster servicing, for mer-chandising or for increasing the number of service calls.
But what is a good idea? To answer this questionwe'll run through three ideas which are being usedsuccessfully by three different shops. Each shop usesits idea for a different purpose and as a result each
IDEASIncrease your business
and decrease costs by
acting boldly on simple ideas
Pac4 eteztae
idea is tailored to a particular situation. Naturally, yourneeds will be different but the logic of each exampleshown here will be the same as that which you'll applyto your shop.
One 'Golden' Thought
National Television in Fort Lauderdale, Fla.,found that it had all the work it could handle during thelatter half of the week but on Mondays, Tuesdays andWednesdays it had idle technicians. After much head -scratching the management came up with an idea.They ran the following ad in the local paper:
"ANY table model tube radio repaired for $3.95.All parts, all labor included if brought in on Monday,Tuesday or Wednesday. Thirty day unconditionalguarantee. Offer void if set has been tampered with."
The ad was run in the classified section under"Miscellaneous."
APRIL 1964 55
As wacky as you may think thead sounded, it worked even betterthan National Television expected.
The offer drew about 10 cus-tomers per week-most of themnew. The average cost of partsper radio was low enough to pro-vide an additional income of $30per week-or $120 per month. Theads cost about $40 a month-leav-ing about $80 a month in additionalincome for the shop. If this was allthere was to the idea, it wouldn'thave been so hot. But there wasmore to it.
First, the extra $80 a month wastaken in without an increase in thewages already being paid. Second,as an immediate result of the offeran average of two TV repair jobscame in each week which weredirectly traced to the radio repairoffer. Third, over a period of sev-eral months an average of four moreTV repair jobs came in from each10 radios repaired. Fourth, at leastone more TV repair job wasbrought in because of word-of-mouth advertising from one of theoriginal 10 customers.
You can see that over a longperiod of time the idea has beenresponsible for an average increaseof seven TV repair jobs per weekor more than one per working day!
If you figure it out for a year,you will also see that this simpleidea, costing $40 a month for ad-vertising, has produced literallythousands of additional income dol-lars for National Television. Ofcourse, all this didn't happen over-night nor did it happen without hardwork and patience.
A lot of shops would have figuredout what they were making on the
radios alone and would have quitwithout giving the idea a chance; orthey would not have wanted tobother with such a "low profit" itemas the table radio in the first place.
Success with ideas depends, ofcourse, on going out of your wayto do a good repair job on the orig-inal radio-even if you actuallylose money on that particular job.
To the customer, the offer pre-sents an ideal and inexpensive wayto "check" the quality of a shop'swork. But most cnstomers comein suspecting that somehow they'regoing to be "taken" and the im-portance of proving to them thatyou are going to do no such thingcannot be stressed too much.
And Another
Skory TV Service in Lansing,Mich., wanted to increase its salesbut being a small shop, the ownercouldn't compete against giants withnew -set sales. Instead, he decidedto concentrate on antenna and rotorsales and installations. Again, takenote that this is a field often over-looked by shops but one where thelittle guy stands a chance.
Skory could have just advertisedthat he had antennas and rotors andwould install them. But he didn't.He went one step further. Skorymounted a modified, self-support-ing, 20 - ft tower on the backbumper of his truck and rigged itso it would lay down over the topof the truck when not in use. Atopthe tower he mounted an antennaand rotor-a packaged deal in-cluding installation which hechanged every week or two. Theinstallation was completed by run-ning 100 ft of lead-in.
The one thing which Skoryoffered which no one else dared wasa free antenna demonstration. He'ddrive out to the customer's house,set up the antenna, run the lead-inand show them exactly how muchhis antenna and rotor would im-prove their reception. Granted, youcan't get optimum results with a100 ft lead-in nor with an antennamounted only 20 ft above theground but it usually providesenough improvement to convincethe customer that he should haveone. Only one customer out of 10didn't buy. Skory averaged aboutfive sales a week using this method.Not a bad improvement for a twoman shop.
Figures to prove that this alsoincreased his service business arenot available, but I do know thatif a customer is satisfied with anytransaction, he will usually comeback to the same shop when hisTV or radio breaks down.
The reason that Skory changedhis antenna special every week ortwo is so he could appeal to cus-tomers in every price range withboth TV and FM antennas.
Auto Radio Bonanza
United Radio, Lansing, Mich.,uses another idea. It sounds verysimilar to the first idea but it's dif-ferent in a very important respect.
United Radio specializes in carradios-they don't repair anythingelse. They have a flat rate whichis $7.95 for repairing any car radiomade in the United States. Thisincludes all parts and labor.
The big difference between Na-tional Television and United Radiois that National Television used
Alb
56 ELECTRONIC TECHNICIAN
There's Money in IDEAS
their flat rate only to increase TVservice business-the expected TVservice to follow radio repairs. ButUnited Radio, specializing only incar radio repair, had to rely ontheir offer for their entire income.As a result, United Radio had towork at reducing the cost of a carradio rapair. However, they didnot try to do this by using cheapparts nor by just fixing the radioso that it would just play. Theyreduced repair cost by:1. Specializing on one item all day,every day - becoming extremelyfast and accurate.2. Reducing to a minimum thetools, inventory and equipment re-quired.3. Keeping the shop small andhence the overhead as low as pos-sible.4. Having an exceptionally effi-cient car radio bench set-up.5. Always having the right tool forthe job.6. Repairing almost all sets whilethe customer waits which elimi-nates "dead money" under thebench. Even such items as output,IF and power transformers are
0 stocked, allowing United Radio tomake repairs on the spot.7. Handling a very large volumeof car radio repairs United Radiocan buy parts in large enoughquantities to save an additional 10to 15 percent on part costs.
Doug Smith, owner and soleoperator of United Radio, afteronly six months in business, wasmaking well over $100 a weekaverage. For a little one man shopnot operating at its full capacitythis is more than good.
As we've shown, an idea isn't
price cutting. These shops do com-pete with price but most of all theycompete with customer service. Allhave found a way to increase busi-ness and decrease cost without de-creasing the quality of work done.They ail offer something no oneelse does. But they are not offer-ing it just to handle more business.They're offering it to make moremoney. There's a difference.
Perhaps a well known exampleof this principle will make itclearer. Years ago Henry Fordwanted to put out a car withinevery man's reach in an age whenmanufacturers were making carscosting thousands of dollars. If hehad simply cut his price, he wouldprobably have been out of businessin a week. But he didn't do this.Instead he got an idea-mass pro-duction, which enabled him tocompete with car manufacturersseveral thousand times his size. Ofcourse, we're not Henry Fords. Butwe are in a competitive businessand one which will probably be-come more competitive as timepasses. To remain in business andmake it pay, we have to use ourheads more today than in the past.We have to constantly "rethink"our business methods-"zero" inanew on our ultimate goal. And asimple idea can put us way out infront.
A road -side sign that paid off.Courtesy Gernsback Publications.
111101
Continued
ANYAMERICAN
CAR
PA0I0 REPA:PF
FOR ALI'
$7.95( EXCEPT (.4 caL 4
COMPLETE
INCLUDESPARTS AND LABOR
APRIL 1964 57
Fig. 1(A)-Plate balanced meter and (BI-cathode balanced meter used in most VTVMbridge circuits.
ACINPUT
TO BRIDGE
Fig. 2-Rectifier circuit used in many VTVMs toeliminate contact potential errors.
INPUT I BRIDGEINPUT
RANGE
Fig. 3-Voltage divider circuit used in mostVTVMs.
FLYBACK
1_00
"=.
B+
0
Fig. 4-Measuring current can be easily ac-complished with a VTVM by using Ohm's Lawand computing I = E/R.
TROUBLESHOOTINGWITH THE VTVM
Learn to use your VTVM for signal tracing
as well as for voltage, current and resistance checks
4 ekea geteaotaa
58 ELECTRONIC TECHNICIAN
Many technicians think a VTVMwas designed exclusively for meas-uring small voltages in grid or otherhigh -resistance, low -voltage circuitswhere more than VOM sensitivityis required. Although a VTVMdoes a good job of this, it was de-signed to do other jobs equally well.
In fact, most VTVMs made to-day appear to be designed withmany of the daily troubleshootingand measurement problems oftechnicians in mind. Wider fre-quency responses have been de-signed into them and P -P scaleshave been added to eliminate theneed for using a scope in manytroubleshooting jobs.
If the technician is given a choiceof only one instrument, the VTVMis probably his best choice. But youcan't measure current, you say? It'strue you can't measure current di-rectly, but it can be done-by inter-polation. And the only time thismethod would probably become aproblem would be in troubleshoot-ing transistor circuits where volt-age variations are slight and currentmeasurements are extremely criti-cal and all-important.
To understand why the VTVMcan be the most valuable tool inyour shop, let's look at how a typi-cal unit operates. This should behelpfully revealing.
Typical Circuits
Most VTVMs are one of twogeneral circuit types. At first glancethe average VTVM schematic mayappear to be a complex mass ofwires and non-descript circuitswhich aren't worthy of understand-ing. For the most part this is adirect result of the fact that almostevery connection and wire in theVTVM must be passed through aswitch. A simplified diagram oftwo basic one -scale VTVM circuitsare shown in Fig.. 1. As you cansee, both are bridge type circuits.As long as both sections of the tuberemain balanced, the currentthrough the meter is negligible. Ifa dc voltage is applied to one tube'sgrid, however, that tube section con-ducts more than the other andcauses a current flow through themeter since the plates and cathodeswould then both be at differentpotentials.
When measuring dc voltages, thebasic circuit is all that is required.For ac voltages, however, the volt-age must first be rectified. A com-mon rectifier circuit is shown inFig. 2. One half of the dioderectifier is a simple half -wave cir-cuit. The other half is used to can-cel out the contact potential of thediode. Contact potential exists be-tween all tube elements and evenin solid state rectifiers. Contactpotential is a voltage which existsacross the diode element even whenno voltage is applied. By connect-ing two diodes in a bucking con-figuration with a series pot, thecontact potential can be countered,however. While this potential isactually quite small, it could haveconsiderable effect on the VTVMreading.
A voltage divider is usually em-ployed at the input of the VTVM.This avoids the possibility of abreakdown between rectifier ele-ments. You should note that theactual voltage which reaches thebridge is not important since itcan be compensated by the ac cali-bration control. The ratio of theac input to the dc output is verycritical, however.
RF, IF and Video Troubleshooting
There is no difficulty in any sec-tion of the modern TV receiver thatcannot be easily found by using theVTVM. There are instances, ofcourse, where it is more logical touse another piece of equipment,but the VTVM is a logical choicein more cases than it is generallyemployed by many technicians andshould find much more use in locat-ing defects.
As an example, let's start witha set which has a raster but no audioor video. Assuming the tubes havebeen checked, the VTVM is thelogical choice to localize this prob-lem. (Many fine signal tracing andinjection instruments are on themarket and can be employed quiteprofitably for such malfunctions.It must be admitted here too, thatthe VTVM will give only a roughindication that a certain stage ismalfunctioning. The video signaltracer -injectors, on the other hand,may even tell you the gain of thevarious stages.)
For the sake of argument (thereare several theories), let's begintracing at the tuner. Connect anAM signal generator to the anten-na input terminals and set the gen-erator to the desired channel. Besure the tuner is also set to thatchannel.
First, the B + and AGC shouldbe cleared. If they are all right,check the bias on the mixer grid.If a good negative reading is ob-tained, the local oscillator can beassumed to be operating normally.A small negative voltage will bepresent here even if the oscillatoris dead. This is a result of contactpotential of the mixer grid (whichwas described earlier in connectionwith ac VTVM measurements).
The RF amplifier can be clearedwhile the VTVM probe is on themixer grid by simply turning thegenerator on and off while observingthe meter reading. A very slightincrease in the voltage (between0.05 and 0.1 v dc) should be notedwhen the generator is switched onwith the RF amplifier operating.The generator should be set on ahigh output when making this test.If you are not sure of your genera-tor, check the results on a normal-ly operating set. The generatorshould produce very dark bars onthe CRT when adjusted to simulatea strong signal.
This is only a rough check, butif the receiver has no sound orvideo, it is sufficiently accurate.
If the signal is verified to thispoint, the probe should be placedon the mixer plate. If a series re-sistor is found in the set, the dc atthe plate should change slightlywhen the generator is switched onand off. (See "Use Your VOM,"this issue for a description of ex-panded voltage scales which may behelpful in reading this small change.-Ed.) If no series resistor is pre-sent, an ac measurement with anRF probe will have to be made.Do not assume that when a voltageis present that the stage is operat-ing. A residual voltage will be pre-sent even with no signal applied.Check for the difference in thevoltage with and without the signalgenerator operating.
Next, check to see that the B +and AGC voltages are normal in
APRIL 1964 59
Current Measurements
Troubleshootingwith the VTVM
Continued
the IF section. If these are normal,an RF probe may be used to local-ize the faulty stage employing thesame methods as used in thetuner: Check each grid and platewith the generator on and off.When a stage is found with verylittle or no difference in signal withthe generator either on or off, you'vefound the bad stage.
Peak reading probes are mostuseful in any stage beyond the de-tector, and troubleshooting pro-cedures are the same as those usedin the RF and IF stages.
Other Problems
One caution must be observed inTV sweep sections that is not nor-mal in other sections of the TVset. Always use the high voltageprobe to measure output plate volt-ages. These voltages have very highpeaks and can do great damage toa meter without this precaution. Inmost cases it will be desirable tomake peak reading measurementsof the output. These are compar-able to the scope waveform voltageshown on most schematics. If you're
not too smart on scope voltagemeasurements, use the VTVMwhile you practice. Although mostmeters are peak calibrated for asinusoidal waveform, they will besufficiently accurate for sweep wave-forms as well.
Troubleshooting in the soundsection of the TV set is not as diffi-cult as some technicians make it.Generally speaking, the same pro-cedure is used here that was usedto check the video -sound IF. A P -Pprobe should be employed and care-ful measurements made at the gridand plate of each stage. Check theactual signal by turning the signalinput on and off. Often a distortedaudio malfunction can also be lo-cated in this manner since weakaudio usually accompanies distor-tion.
Power supply troubles can oftenbe easily located with a VTVMtoo. While dc measurements rarelyever turn up a malfunction otherthan a completely dead set, acmeasurements with the P -P probewill often show up a faulty elec-trolytic.
* CLOSED CIRCUIT TELEVISION * BURGLAR ALARMS
4( REMOTE CONTROL SYSTEMS * PUBLIC ADDRESS
SAND MUCH gt
The VTVM will measure current,but it should only be used as alast resort. If a VOM is available,it is a logical choice since it is de-signed to measure current. At leastone instrument is available whichcombines the functions of a VTVMand a VOM.
If it becomes necessary to mea-sure current with a VTVM, the pro-cedure is simple and only a littleknowledge of Ohm's Law is re-quired. Normally, a circuit carry-ing the unknown current has someresistance in it. If we know whatthe resistance is, it is very simpleto measure the voltage drop andthen, by Ohm's Law, determine thecurrent flowing through the circuit.
As an example, suppose youneed to know what current is flow-ing in the horizontal output tubeand all you have is a VTVM. Atypical output stage is shown inFig. 4. First never assume that aresistor is actually the value itshould be. Measure it. In the cir-cuit shown in Fig. 4 this is quiteeasy since the only connection toone end of the resistor is the tube'scathode. If the tube is hot, pullthe tube to be sure you get an ac-curate reading. Let's say the re-sistor is 1000. Now turn the seton and measure the voltage dropacross the resistor after the set haswarmed up. Suppose you measure10 v. Then by Ohm's Law, to de-termine the current flowing in thiscircuit, you divide 10 (volts) by100 (ohms). You should get 0.1amp or 100 ma. This same systemcan be applied to almost any circuitand errors from meter insertion areeliminated.
Commonly, there is no resistoravailable in many circuits which canbe used to measure the current flow.Again the horizontal output stageis a good example. Many horizontaloutput stages do not have a cathoderesistor. The meter cannot beplaced in the plate circuit becauseof the high voltage transients. Buta low -value resistor can be placedin the cathode circuit, say 511, andthe current can be computed in thesame manner as before. A slightactual error will exist but it can beneglected in most cases.
60 ELECTRONIC TECHNICIAN
TARZIANRADIO -TV
TIPS:
How to achieve trouble -free replacement
of Selenium with Silicon Rectifiers
Substituting silicon for selenium rectifiers is highly desirable, but silicon units haveextremely low impedance. When the rectifier conducts, a heavy pulse of current passesinto the capacitor and through the power line. You can see this if you connect an oscillo-scope across the surge limiting resistor. The strong pulse can cause interference bymixing with incoming video or radio signals.
Here are the symptoms you will notice, and here is the simple way to eliminate them.
POSSIBLE TROUBLE
Objectionable hum in radio,or,
TV picture brightness fluctuatesduring pulse,A black or white horizontal bar isgenerated across the picture tube(and can be shifted from top tobottom of picture by reversing acplug),The bar may interfere with the syncsignal and the picture will pull outof vertical synchronization.
1*. sorts TARZiAllA SiMPLACSINIONT
itfiCTYPIEAS
The Tarzian Replacement Line in-cludes silicon rectifiers and conversionkits, tube replacement silicon rectifiers,and "condensed stack" selenium rec-tifiers. Immediately available from dis-tributors throughout the nation, in thequantities and ratings you. want most.
APRIL 1964
1.17 VAC
22".M
F4
40 rnfa
RADIO13+150V.
>B
Before After
SOLUTIONInstall a 1000 mmfd capacitor between the resistor and therectifier, from the rectifier end of the resistor to the negativeline (see circles). The RC combination provides necessaryfiltering action.You'll also notice a sharp reduction in rectifier failureformerly caused by transient voltages fed in off the line.
TELEVISION
117 VAC
1
im 500 or F4 +200.7,1 a
Before
"B
FREE CATALOG 62 -DL -4 contains completeinformation on all Tarzian Replacement LineRectifiers. Send for your copy today-be sureyour files are up to date on the rectifier linevoted first choice among service techniciansthroughout the United States.
Cr World's Leading Manufacturers of TV and FM Tuners Closed Circuit TV Systems BroadcastEquipment Air Trimmers FM Radios Magnetic Recording Tape Semiconductor Devices
SEMICONDUCTOR DIVISION BLOOMINGTON, INDIANACanadian Licensee: Marsland Engineering Limited 350 Weber Street North, Waterloo, Ontario
- - - for more details circle 51 on post card61
After
SARKES TARZIAN Inc.
TOUGH DOG CORNER
Difficult Service Jobs Described by Readers
Loose Rivet
A General Electric Model 21C103was brought into the shop with thecomplaint of intermittent loss ofraster. Two weeks of operation inour shop failed to produce anythingbut normal operation. After thor-oughly checking the picture tubeand its associated circuitry; the high-voltage, damper, horizontal output,oscillator and vertical output cir-cuits and replacing all marginalcomponents, the set was operatedfor an additional two days and re-turned to the customer.
Two months later the culprit wasonce again brought in with the samecomplaint. When placed on thebench and fired up, the set producedwhat at first was thought to be anormal raster. Closer observationdisclosed a slight ripple visible onthe edges of the raster. All tubesin the horizontal and video sectionwere replaced to no avail. Thinkingthe 60 cycle modulation and theintermittent loss of raster were re-lated, the scope was brought intothe game. Removing B + from thecircuit and using the direct probe,the search was on. The oscillator
Loose connection on ground lug tied cathodeto one side of filament.
checked out OK but lo and beholdthere was 2.5 v of 60 cycles on thecathode of the horizontal outputtube. How could this be? Thecathode is grounded in this model-or is it? Tracing the circuit wefound the ground lead from thecathode ran first to the heater pinand then to a rivet type connectionon the chassis. Here was the rootof all the trouble. The rivet wasmaking intermittent contact withthe chassis. A low resistance con-tact had developed which was re-ducing the heater voltage and at thesame time modulating the cathodewith 60 cycles. The model has analuminum chassis pan and the lowresistance contact cannot be elim-inated by the normal practice ofreheating the ground terminal. Toeffect a permanent cure we ran anew lead from this terminal to therear chassis apron which is galva-nized sheet iron and is also used forgrounding the heater winding onthe power transformer. The set hasbeen operating for some five monthswith no further complaint. -ScottR. Commons, Lawton, Okla.
Light Sensitive Ne2
A Sonar depth finder was re-ceived from a fishing boat in an in-operative condition. After repairswere made, it was given the usualshop check-out and worked perfect-ly. Later, the boat owner com-plained that it would not operateuntil he had been at sea for a coupleof hours. During the period of dark-ness while the boat was heading foropen sea, he could get no depthflashes on the scale. Shop voltagechecks and operational checksshowed the set to be working dis-gustingly well. The first real cluecame when the owner said it wouldstart working when he turned onthe cabin lights. The neon bulb
(which had been replaced duringthe original repairs) would not fireunless some light fell on it. Theionization point on this particularneon was critical. A new Ne2 neonbulb provided a complete cure. Asmall cardboard box with a peephole can be placed over these smalldepth finders to check neon firingunder dark conditions. - LarryMings, Savannah, Ga.
Hum
The outside technicians hadbrought in an RCA CTC5 colorchassis that had been working wellfor many years. But it had nowdeveloped an ac bar inthe picture. The bar was not ofgreat intensity but could be easilyseen.
The outside men had tried tubesbut nevertheless they were checkedagain in the shop. No luck. Nextthe chassis was pulled and filterswere shunted. The bar stubbornlyremained.
The ripple was localized with thescope to the luminance circuit. Theac could be clearly seen with thescope at the plate and cathode ofthe 6AW8 first video amplifier withthe inputs from the IF disconnected.
While trying to trace where theripple was originating, the set hadbeen switched off and scope probe
Continued on page 82
TOUGH DOGS WANTED
$10.00 paid for acceptable items. Usedrawings to illustrate whenever neces-sary. A rough sketch will do. Photo-graphs are desirable. Unacceptableitems will be returned if accompaniedby a stamped envelope. Send yourentries to "Tough Dog" Editor, ELEC-TRONIC TECHNICIAN, 1 East First St.,
Duluth 2, Minnesota.
62 ELECTRONIC TECHNICIAN
ANOTHER GREAT ADDITION TO THEFAMOUS SERIES OF B&K ANALYSTS
SIMPLIFIES
SPEEDS
TV SERVICING
AND
Here is an exciting new addition to the famous B&Kseries of Television Analysts-designed to give every servicetechnician a faster, easier way to service more TV sets!
The compact "1074" gives you a complete TV signalgenerating source of your own. Using the B&K point-to-point signal injection technique, you can isolate and pin-point any performance problem for quick correction.
By injecting your own signals, with a visual check onthe TV screen, you can easily signal -trace and troubleshootany stage throughout the video, audio, r.f., i.f., sync andsweep sections of black & white and color television sets.
It becomes much easier to find and fix "tough dogs,"and troublesome intermittents, as well as to solve othergeneral TV set troubles-to the satisfaction of your cus-tomer, and to your own profit. Net, $24995
Compact Model 1074TELEVISION
FOR BLACK & WHITEand COLOR
Provides Thinnest
Horizontal Line and
Smallest Dot Patterns
(one scanning line high)
for Easiest Convergence
Vertical Lines
Dot Pattern
AEI EEL
iIiiCrossft,1
Horizontal Lines Color Pattern
Supplies complete r.f. and i.f. signals, with pattern video andtone audio. Video signals are switch selected for fast, visualtroubleshooting. Provides FM modulated 4.5 me sound channel,with built-in 900 cycle tone generator. Provides composite syn-chronizing signals. Provides separate vertical and horizontalplate and grid driving signals to check complete output circuitand interrelated components. Many other features.
Makes it Easy to Set-up and Service Color TVProvides dot pattern, crosshatch, vertical lines, horizontal lines,burst signal and individual colors (Green, Blue, B -Y, R -Y, Red,I, and Q) one at a time on the TV set-all crystal controlled formaximum accuracy. Color phase angles are maintained in ac-cordance with NTSC specifications. Thin lines and high stabilityassure fastest, easiest convergence and linearity adjustments.Color display makes demodulator alignment extremely simple.
Time -Saving, Money -Making Instruments Used and Preferred by Professional Servicemen Everywhere.
Model 375 DynamaticAutomatic VTVM
Model 360 V 0 MaticAutomatic VOM
Model 700 Dyna-QuikTube Tester
Model 850Color Generator
Model 445 CRTTester Rejuvenator
See Your B&K Distributoror Write for Cat alogAP2 I
BaK MANUFACTURING CO.DIVISION OF DYNASCAN CORPORATION
1801 W. BELLE PLAINE AVE. CHICAGO 13, ILL.Canada: Atlas Radio Corp., 50 Wingold, Toronto 19, Ont.Export: Empire Exporters, 253Broadway, New York 7, U.S.A.
- - - for more details circle 14 on post cardAPRIL 1964 63
SHOP HINTSTIPS FOR HOME AND BENCH SERVICE
Illegible Tube NumbersWhen type numbers on old tubes
are so faint as to be almost com-pletely illegible, put a little am-monia on a piece of cotton and dabit on the numbers. They will be-come readable when the ammoniadries.-Henry Mullen, Cleveland,Ohio.
Sometimes code numbers and let-ters on tubes can be difficult to readbecause of erasing due to heat andhandling. Cleaning the tube andblowing gently on it to form mois-ture will in most cases make themreadable.-Erling Alstrup, CumbCo., N.S., Canada. Still another method for solvingthis problem is to gently stroke thecoded area on your hair. Usually,it will pick up enough oil to becomelegible.-Ed.
Nut Driver RepairWhen the contact surface of the
nut driver has become roundedthrough use to the extent that it will
Grinding off tip removes damaged portionof nut driver.
no longer do its job, grind off ap-proximately 1/8 in. thus exposingan unused surface that is practicallyas good as new.-E. S. Broyles,Denver, Colo.
Capacitor TestThis quick test for leakage in
coupling capacitors in the audiocircuit of many receivers avoids un-soldering any wires. Connect avoltmeter across the primary ofthe output transformer and shortthe plate of the driver tube toground or B-. If the voltageacross the primary decreases when
the plate of the driver is shorted,the coupling capacitor should bereplaced. The rectifier tube ofac/dc sets won't be damaged bythis procedure since the load resistorof the driver tube is very large.-H. Josephs, Gardenville, Pa.
Strobe SaverThe constant use of my card-
board Stroboscope caused the centerhole to wear and fray so much thatit became inaccurate. By gluinga plastic 45 rpm insert (spider)directly over the hole in the center,the strobe will last much longer andcan be hung on a nail near thebench. Try this on new units andsave yourself problems.-SamuelJacobs, Hyde Park, Mass.
Short DetectorWhen determining the reason for
burned out TV fuses, we use a I/2to 2 amp auto light bulb connectedacross the burned out fuse. Inter-mittent shorts will show up by jar-ring suspected components andwatching for the bulb's brilliance toincrease.-H. Muller, Danboro, Pa.
Mobile HookupIn connecting a mobile unit
power supply wire to the necessaryignition switch terminal of an ac-cessory -loaded auto or truck, thereare generally some problems. Theblank fuse connections left on thefuse panel under the dash is moreaccessible than the ignition switch.By connecting the "hot" wire to ablank terminal on the panel, yousave time and effort.-Stan Clark,E. Bradenton, Fla.
Screw HolderWhen trying to put screws in
those hard -to -reach places, wrapsolder around the shaft of yourspintite or screwdriver and thenwrap around the shank of the screw.
Solder is used as an aid to hold screws.
After screw is started, the pull ofthe driver will straighten the solderand the screw can be tightened.Bonus: you always have solder onhand!-William R. Skilling, Albany,N. Y.
Scratches Mark SpotIt's not always easy to line up
the control shafts and mountingbolts when returning a chassis tothe cabinet. To prevent this diffi-culty, make scratches with a sharppointed object at the two rear chas-sis corners before removing it. Itis easy to line up the chassis cornerswith the scratches when returningit to the cabinet. This method isalso useful for some speakers, tun-ers, CRT brackets, etc.-David F.Jacobs, Bethel Park, Pa.
SHOP HINTS WANTED
$3 to $10 for acceptable items. Use
drawings to illustrate whenever necessary.A rough sketch will do. Unacceptableitems will be returned if accompanied bya stamped envelope. Send your entriesto Shop Hints Editor, ELECTRONIC TECH-NICIAN, Ojibway Building, Duluth 2,Minn. The hints published in this columnhave not necessarily been tried by ELEC-TRONIC TECHNICIAN editors and are theideas of the individual writers.
64 ELECTRONIC TECHNICIAN
NOW EVERYONE CAN QUICKLY
Set up and Service Color TV
1
2
PATTERN DISPLAY STANDARDShows correct patternin window viewerfor visual guide
PATTERN SELECTOR
Produces each patternindividually for quick,easy convergence
AUTOMATIC OECONVERGENCE
3Simplifies static anddynamic convergence.No digging into set
4
5
6
COLOR SELECTOR
Produces each colorone at a time foraccurate color set-up
COLOR GUN KILLER
Automatically enables thetechnician to actuate anycombination of the 3 guns
DEMODULATOR ALIGNMENT
Makes alignment extremelysimple, without goinginto the color set
B50 COLOR GENERATOR
Most Complete, Most Versatile, Portable Instrument for Use in the Home and in the ShopMakes Color TV Set-up and Service Easier, Faster than ever!
Now every service technician can be ready to set-upand service color TV with amazing new ease andspeed! New advanced design simplifies the entireoperation, saves time and work in every installation.Eliminates difficult steps in digging into the colorTV set. Gives you new confidence in handling color.Produces Patterns, Burst, and Colors Individually-Provides dot pattern, crosshatch, vertical lines, horizontallines, burst signal, and individual colors-one at a time-onthe TV color set-for fastest, easiest check. Unique window -viewer on front of the instrument panel shows you each pat-tern as it should be-gives you exclusive display standard touse as a sure guide for quick, visual comparison.
Provides Accurate, Individual Color Display-Pro-duces Green, Cyan, Blue, B-Y, Q, Magenta, R-Y, Red,I, Yellow, and Burst-one at a time. All colors are crystal -controlled and are produced by a precision delay -line formaximum accuracy. Each color is individually switch-selected-no chance of error.Provides Accurate NTSC-Type Signal-Color phaseangles are maintained in accordance with NTSCspecifications.Makes Convergence and Linearity AdjustmentsEasy-Highly stable crystal -controlled system with
vertical and horizontal sync pulses, assures the ultimatein line and dot stability.Simplifies Demodulator Alignment-The type of colordisplay produced by this instrument provides the ulti-mate in simplicity for precise demodulator alignment.Provides Automatic Deconvergence-Eliminates thenecessity for continual static convergence adjustments.The instrument automatically deconverges a white into acolor dot trio without digging into the color set to mis-adjust the convergence magnets. It also deconverges awhite horizontal or vertical line into red, green and blueparallel lines. This greatly simplifies dynamic convergenceadjustments.Provides Exclusive Color Gun Killer-Front-panelswitch control makes it easy to disable any combinationof the three color guns. Eliminates continuous adjustmentof the background or screen controls, or connection of ashorting clip inside the receiver. The switch also selectsthe individual grids of the color tube and connects to afront -panel jack to simplify demodulator alignment.Provides Switch -Selected R.F. Signals-Factory-tuned, for channels 3, 4, and 5-for open channel use inyour area.Model 850 also includes other features thatmake it invaluable for home and shop use. Net,
See Your B&K Distributoror Write for Catalog AP21-T
B & K MANUFACTURING CO.Division of DYNASCAN CORPORATION
1801 W. BELLE PLAINE AVE. CHICAGO 13, ILL.Canada: Atlas Radio Corp., 50 Win gold, Toronto 19, Ont.Export: Empire Exporters, 253 Broadway, New York 7, U.S.A.
- - - for more details circle 15 on post cardAPRIL 1964 65
ItNEW PRODUCTSFOR MORE INFORMATION CIRCLE PRODUCT NUMBERS ON POSTCARD FOLLOWING PAGE 98.
TUBE TESTER 200This tube tester is said to have
a simple test set-up procedure forchecking emission, shorted elements,
and continuity. A 41/2 -in. meterhas a 3 -color REPLACE -WEAK-GOOD scale and 0 to 100 scalefor matching. Tests 7- 9- and 10-pin miniatures, octal, loctal, 5- and7 -pin nuvistors, novars and corn-pactrons. Types tested includeseries string, magic eye, VRs.Adapter available for testing allCRTs, both color and B/W. EICO
MULTI -BAND RADIOS 201A line of four multi -band tran-
sistor radio portables includes theMarina, Y2587, which has eighttransistors, two diodes and onethermistor, and will operate up to425 hours on three size "D" flash-light cells, it is reported. In additionto the standard AM broadcast band,this radio has a shortwave band
covering 4 to 6 Mc marine broad-casts, and 6 to 12 Mc internationaltransmissions. The third bandcovers 12 to 20 Mc broadcasts. Anac charger plug is optional. Ad-miral.
TUBE SHIELD 202A tube shield is said to extend
the life of KT88, 6336 and tubeswith similar envelopes. The fin -type heat dissipating tube shieldincreases tube life approximatelyfive times, according to the report.The shield body measures 2 x 21/2in. The crown piece measures 1/2
x 21/4 in. with contoured pressuretangs extending up 3/8 in. Radiating1/4 in. fins run the length of bothsections. Cool -Fin.
STEREO RECORDER 203The T-367 stero tape deck/
duplicator, providing facilities forfour -track stereo tape recording,playback and tape duplicating, isintroduced. The report indicatedthat a self-contained preamplifierspermits recording, playback andtape duplicating without need forexternal amplifiers, yet providespreamplifier level output adequateto feed into a separate stereo systempower amplifier. A unique featureof the new Tape Deck/Duplicator
is its ability to make copies of tapeswithout need for a second tapetransport, simply by the additionof accessory motors which mountto the deck assembly housing, thereport said. These motors also per-mit use of the larger 101/2 in. tapereels to achieve increased recordingand playback time on a single reelof tape. The tape deck may beoperated either with or without ac-cessory motors. Price $369.95.Bell Sound.
MAGNIFIER 204A 3-D slip-on binocular -type
magnifier is introduced. It can beused when working with tiny fit-tings, thin wires, fine thread, tolocate cracks in printed circuitryand while working on small port-able electronic equipment. It wasreported that normal vision is re-stored merely by lifting the heada little and without removing the
r -device. The unit is offered on a30 - day money - back guarantee.Price $9.95. Fairchild Optical.
66 ELECTRONIC TECHNICIAN
reeierPRODUCTPIUS A0?-rieet S),,d'a'Aa/ a e
tullotr,
Must -Reading since 1930-Sylvania News
Sylvania and its distributors have long known that it pays to keep their customers informed.That's why 35,000 dealers today receive, read and depend on Sylvania News for useful infor-mation. Now in its 35th year of continuous publication, the News is still one of the mostimportant dealer publications in the industry. Dealers aren't the only ones who read SylvaniaNews-it also serves some 70,000 distributors, engineers and technical service men. Are yougetting your copy? It's free. You can request it by asking your Sylvania distributor or droppinga line to: Editor, Sylvania News, 1100 Main Street, Buffalo, N. Y. 14209.
SYLVANIASUBSIDIARY OF
GENERALTELEPHONE & ELECTRONICS GTE
APRIL 1964 67
NEW PRODUCTSJOIN THIS MAN!
MAKE MOREMONEY IN
ELECTRONICSSEND COUPON NOW FOR FREE BOOKTrained men get ahead fast in the exciting field of Elec-tronics. Learn all about Transistors, Communications,Aerospace Electronics, Computers. Cleveland Institute ofElectronics can teach you . . . at home for a fraction ofclassroom training cost. Check these CIE advantages:No Experience Needed: "Check -Point" Home Study Planpresents material in small, easy -to -understand bits . . .
reinforced with clear explanations, diagrams, examples.Nationwide Job Placement: Cleveland Institute studentsget bi-monthly listings of hundreds of high -paying jobs inelectronics . . . the world's fastest growing industry!A Commercial FCC License . . . or Your Money Back:Should you fail your FCC exam after completing yourlicensing program, CIE will refund all your tuition!
Cleveland Institute is an accredited member of theNational Home Study Council; is also approved forVeteran's training under the Korean GI Bill.
ACT NOW... SEND COUPON FOR FREE BOOK
Cleveland Instituteof Electronics1776 E. 17th St., Dept. ET -5
Cleveland, Ohio 44114Please send FREE Electronics Career Bookwithout obligation. I'm a high schoolgraduate interested in (check one):
Electronics Technology Broadcast Engineering Industrial Electronics First Class FCC License Electronic Communications Advanced Engineering
Your Occupation
Name Age(Please Print Clearly)
Address
City State Zip Code
RAINBOW CONVERTER
current
205An adapter
that providescrystal - con -trolled ke yedrainbow colordisplay andmore accuratehorizontal syn-chronization forthe Model 1076TV Analysts inuse prior to the
1076 Analyst is announced. The crystal -controlled circuit is already being incorporated in thecurrent Model 1076 TV Analyst, according to themaker. The adapter is designed for easy conversion ofall Model 1076 TV Analysts before Serial No. 425301and from Serial Nos. 505001 to 506100 to providea crystal -controlled keyed rainbow color display forbetter definition of each of the color bars on the pat-tern, particularly the R -Y and B -Y bars for best colordemodulator alignment, it is reported. Price $35.95.B & K.
BASE STATION ANTENNAS 2061 he MK -30
series omnidi-rectional verticalbase station an-tennas for thecommercial two-way 27-50 Mcrange is an-nounced. Thehalf -wave verti-cal radiator isvoltage fed atthe bottom high -impedance pointthrough specialquarter - waveL auncher -Matcher shorteds t u b, integralwith feed cable.There is no loading, the maker indicated. Physicallength is an electrical half -wave at the operating fre-quency. Bandwidth is a minimum of 800 kc for 2.0:1VSWR depending on the frequency, with power ratingat 250 w continuous, it is said. Mark Products.
SERVICE BODIES 207An expanded line of rear wheel chassis service bodies
is announced. Four new models expand the range
68 ELECTRONIC TECHNICIAN
VAN NUYS, CALIF 1111
ea NM
rc.c..111ANY, N Y
ELECT RONICSLAFAVL"F 'STORE
ASSDOA
AYETTEVILLE, NO. CAR.
PROOF OF 119 SUCCESS STORIES!Fi SPRINGFIELD, j1,1,
Ary
iceeiZra77ELECTROMCS
IWAVETTEcs lligNei[ET.nof(21 7'41
PHOENIX, ARIZONA Aci COLUMBIA,'-'1111tim
119 INDEPENDENT SERVICEMENASSURED THEIR LIFE'S FUTURE
with theLAFAYETTE ASSOCIATE STORE PROGRAM
What Are You Waiting For--
You're in business for yourself, prob-ably an independent serviceman likethose other 119 businessmen. Youhave a basic knowledge of radio, tele-vision or electronics, and most of allyou have ambitions to become a truesuccess story-with your own profit-able business, a respected place inyour community, and security for yourfamily.You owe it to yourself, and your fam-ily, to investigate the Lafayette Asso-ciate Store Program.
This Is What We Offer You:
1 Business Stability-Lafayette Ra-dio Electronics has been in busi-ness for 43 years. You'll cash inon this established reputation.
Mail the coupon for
completeinformation
without obligation.
What are YOU waiting for!
2. Product Diversification-You cansell the tremendous variety of prod-ucts that Lafayette offers-hi-fistereo, citizens band, tape record-ers, radios, tools, radio and T.V.parts, hobby supplies, and muchmore. You'll attract more custom-ers than you ever thought possible.
3. Advertising Support-Year 'roundadvertising, publicity, public rela-tions and promotional campaignshave established Lafayette and itsfranchised dealers as America'sprimary source for hi-fi and elec-tronics.
4. Protected Territory-Yours will bethe ONLY franchised Lafayette Ra-dio Electronics Associate Store inyour marketing area.
r
5. Marketing Guidance-Our programhelps you set up a complete op-eration. We'll help you select theright location, or evaluate yourpresent one, design your store formaximum profit and assist in se-lecting your inventory. We'll showyou how to deal with customers,how to hold a loyal following, howto build a successful business andmaintain it. We will always beavailable to help you in any waypossible. In short, we want you tobe a Lafayette Success Story.
We are looking for a limited numberof men who want to become part ofAmerica's largest and most successfulElectronics Associate Store program,who are willing to invest $10,000 to$30,000 to make a new businesscareer for themselves.
Lafayette Radio Electronics CorporationDept. ETD -4111 Jericho Turnpike, Syosset, L. I., New YorkMr. Robert LaubPlease send me full information on how I can own my own profitablebusiness. I understand there is no obligation.
Name
Address
City Zone State
APRIL 1964- - for more details circle 39 on post card
69
( NEW PRODUCTS
of cab -to -axle dimensions from 48in., up to 61 in. In addition to the
popular 11/2 ton, there are nowavailable stock dual wheel servicebodies for 3/4 ton, and a number of1 ton chassis heretofore requiringspecial customizing. All -steel bod-ies are phosphatized and coatedwith a zinc chromate primer, insideand out, for maximum protection.Morrison Steel Products.
SSB MICROPHONES 208A single sideband-type micro-
phone, model 454, for SSB CB and
Pusim/P""""iiiiiWITH BUILT-IN
METER PROTECTION
AND STILL ONLY '47"
Model 120: Still only $47.95!Model 120M: Still only $56.95!
Prevents damage to metermovement even with
1,000 times overload!
Precision/Paco's professional 120 and120M V -O -M models-with more total ranges,
larger meter size, a mirror scale included,and a longer guarantee-now have still another
great feature: built-in meter protectionagainst accidental overload-at absolutely
no extra cost! Meter -movement will remaincompletely unharmed even by an accidentaltransient overload of 1,000 times or more!
Only Precision's Model 120 V -O -M with15 years of proven acceptance has such a
sensational economy feature!
Place your order today! Write for yourcatalog on the entire Precision line!
PRECISION!Apparatus, Inc.
80.00 Cooper Avenue, Glendale, N. Y., 11227
Export: Morhan Exporting Corp., 458 Broadway, New York, N. Y., 10013Canada: Conbro Imports, Ltd., 8900 Park Avenue, Montreal
amateur use, is announced. Achoice of PTT or VOX, 300 to3000 cps, -48 db on the 454Xcrystal and -52 db on the 454Cceramic model, is available. Bothmicrophones have a coiled cord asstandard equipment. When wiredfor PTT, the 454 features twoswitching arrangements - push -to -talk, and a Lever -Lock switch tohold the microphone live. $26.50list, $15.90 amateur net. Turner.
PC SWITCHES 209A line of printed -circuit rotary
switches is introduced. Known asType PB switches they are readily
interchangeable with e xis tingprinted -circuit switches, it was said,and allows mechanical options andattachments identical to equivalentframes of hand -wired models. Theswitch accommodates up to 22 TypeK insulated clips per section, 12clips on one side, 10 on the other-all with 30 -deg spacing; each alsois adaptable to meet 45- and 60 -degfunctions, the maker announced.Oak.
ORGAN KIT 210An all -transistor electronic organ,
sold in assemble -it -yourself kit form,is announced. Called the Recital
C
4
- - for more details circle 44 on post card70 ELECTRONIC TECHNICIAN
I'Tips for Technicians
Mallory Distributor Products CompanyP.O. Box 1558. Indianapolis 6, Indianaa division of P. R. Mallory & Co. Inc.
Why Mallory Mercury Batterieswork better in transistor radios
LISTENING HOURS PER PENNY
with Mallory Mercury Battery
with zinc -carbon battery
2 /2
SERVICE LIFE: 11'2 VOLT PENLIGHT CELLS
HOURS OF SERVICE
Mercury
II. Zinc -carbonIlk0 1 2 3 4 5 . 6
STORAGE: YEARS
7 8
APRIL 1964
There are a lot of good reasons why more and morepeople are using mercury batteries in their transistorradios. And the reasons boil down to this-they're abetter value, and they give better performance.
To get a comparison between mercury batteries andordinary zinc -carbon batteries, let's look at a typicaltransistor radio. This radio uses size "AA" penlightbatteries and has a current drain of 15 milliamperes.The Mallory Mercury Battery is the ZM9 and the zinc -carbon type would be the NEDA type 815. The ZM9retails for 750 versus 200 for the 815. Got the picture?
Here's where the fun begins. The ZM9 will operate theradio for 165 hours versus only 35 hours for the zinc -carbon battery. This means that for one penny you'llget 2.2 hours of listening pleasure using the ZM9 versus1.75 hours for the zinc -carbon battery. In other words,it costs you 0.57 cents per hour to use the zinc -carboncompared to only 0.45 cents for the mercury battery.
We're not through yet. Let's get back to listeningpleasure. The mercury battery has essentially a flat dis-charge curve. This means that it presents a more con-stant voltage to the transistors. Result : you don't haveto keep turning the volume control up while you're lis-tening AND the radio sounds better because there'sfar less distortion.
Had enough? There's one more important point. Sup-pose you put the batteries in the radio and use it onlyslightly. Those 200 zinc -carbon batteries go "dead"in a few months whether you use them or not. But themercury batteries can be stored 2 to 3 years and stilldeliver dependable power. Plus the fact that MalloryMercury Batteries are guaranteed* against leakage inyour transistor radio.
We've used this "Tip" to illustrate the superiority ofMallory Mercury Batteries in transistor radios. Butthis superiority extends to thousands of other applica-tions. So whether you're building test equipment, heart -pacers, or satellites, see your Mallory Distributor. Hehas a Mallory Mercury Battery that will do exactly thejob you want done.
*We guarantee to repair the radio and replace the batteries, free of charge, ifMallory Mercury Batteries should ever leak and damage a radio set. Send radiowith batteries to Mallory Battery Company, Tarrytown, New York.
- - - for more details circle 40 on post card71
5 -CHANNEL MIXER-PREAMP, MODEL E -5P
NEWCOMB
PATHFINDER P.A.
20 WATT E 20 0,
ECONOMY LINE
PUBLIC ADDRESS
AMPLIFIERSNEWCOMB AUDIO PRODUCTS CO.Dept. ET -46824 Lexington Ave.Hollywood, California 90038
Gentlemen:Please send immediately a free copy ofyour Catalog No. PF-7 describing indepth your Pathfinder P.A. line.
NAME
ADDRESS
CITY.
STATE ZIP
- - - for more details circle 42 on post card72
NEW PRODUCTS
Organ, it is said the instrumentoffers realistic pipe tones combinedwith complete adaptability to anykind of music one may wishto play. The instrument representsa newly -developed concept in mu-sical instruments-a full-size organcomparable in physical and musicalqualities to some of the best two -manual pipe installations plus aunique "Library of Stops" (TM)feature which enables changing anyor all 32 organ voices for completelydifferent ones in literally a fewseconds, the report indicated. Kitprice, about $1500. Schober.
LECTERN SOUND SYSTEM 211
A lectern that contains a com-plete high volume sound system isintroduced. Called the Ampli-Vox
Sound Column Lectern, the unit issaid to provide every professionalaudio feature. It was said the self-contained unit provides enoughpower for audiences up to 3000. A25-w all -transistor, push-pull amp-lifier and six built-in speakers areused. A cardioid microphone is sup-plied. Power is derived from 10flashlight batteries. The lectern isconstructed of wood covered with
CONVERGEON YOUR TV
PROBLEMS WITHTEST EQUIPMENT
that hasEXPERIENCE
Color bar -dot generatormodel 800
EXCLUSIVE PUSH BUTTON PANEL - MAKES SEPERATE PATTERNOR COLOR SELECTION EASIER AND FASTER CLEARLY MARKEDFOR ERROR FREE SELECTION - STAND BY - oN-OFF - PATTERN -SOUND - CROSSHATCH - HORIZONTAL LINES - VERTICAL LINESDOT PATTERN - EIGHT DIFFERENT COLORS CONVERGENCE IN 15 MINUTES - SIMPLE STEPS TO FOLLOW EASY TO SET UP - COLOR CODED CLIP -ON CONNECTIONS FRONT PANEL JACKS - ALLOWS EASY ACCESS OF VIDEO, SYNCOR COLOR DEMODULATOR SIGNALS VIDEO LEVEL CONTROL AND VIDEO OUTPUT JACK PROVIDESEITHER POSITIVE OR NEGATIVE VIDEO INFORMATION COLOR GUN KILLER SWITCH - ALLOWS EASY SELECTION OF ANYCOMBINATION OF 3 COLOR GUNS OPERATES ON TRANSFORMER - ISOLATED 117 VOLTS 93-60CYCLE AC
DEALER NET $239.95
5 -inch wide -bandhigh sensitivity oscilloscope
model CRO-3WIDE BAND AMPLIFIER, FLAT WITHIN 1 DB FROM 20 CYCLES
TO 4.5 MC TWO -RANGE VERTICAL DEFLECTION SENSITIVITY FROM 0.018RMS VOLT -PER -INCH HIGHLY STABLE AMPLIFIER CIRCUITS - NO BALANCING REQUIRED POSITIVE OR NEGATIVE INTERNAL HORIZONTAL SYNCII50
LINEAR SAWTOOTH SWEEP OSCILLATOR, 20 CYCLES THROUGH
II INPUT CALIBRATING VOLTAGE, 10 VOLTS PEAK TO PEAK VERTICAL POLARITY REVERSALNI HORIZONTAL SWEEP EXPANSION RETURN TRACE BLANKING
Z-AXIS MODULATION - EXTERNAL OR INTERNAL 60 -CYCLE DIRECT CONNECTIONS TO DEFLECTION PLATES WHEN REQUIRED
DEALER NET $234.95
ACCESSORY PROBES FOR THE JACKSON CRO-3 LC2-1.- LOW CAPACITY PROBE $19.95 LC10..P HIGH VOLTAGE LOW CAPACITY PROBE
74 9955 DFM-P DEMODULATION PROBE
0\
124 McDonough St. / Dayton,Ohio
- - - for more details circle 38 on post cardELECTRONIC TECHNICIAN
Jackson ElectricalInstrument Co.
FHRFUNDAMENTAL HARMONIC RESONANCE...GC'S EXCLUSIVE DESIGN PROCESS!Colormagic elements resonate on the fundamental harmonics within both the high andlow bands. Colormagic FHR outperforms the average second harmonic TV element by
producing a tight, laser -linked directivity of signal...higher gain! It's in the elements!
GC "GOLD -GUARD" anodizing process guards againstpitting, chipping, rust and corrosion...makes the Colormagicseries the best protected, all-weather line available!
Compare! Colormagic AntennaSystems offer pencil -point polarpatterns...laser-linked directivity....flat plateau response curve...no traps or peaks...excellent forcolor or black & white TV recep-tion.
270°
330.
210'
GC "SOLID-SEMBLED" construction insures quick, easyinstallation...rigid-lock elements snap securely into place!
15 All -New Colormagic Combo-.Couplers permit cross -directionreception of UHF -VHF -FM anten-na combinations...each unit en-cased in high -impact polystyrenecase...supplied with stainlessSteel mounting strap. Completesales program available.
180.
See your GC Distributor! He'll fill you in on this "prestige" package. CONSIDER THE ELEMENTS INVOLVED! ...then GOCOLORMAGIC! If not stocked locally, write us for name of Distributor nearest you.
GC ELECTRONICS CO. I Western Plant: 3225 Exposition Place, Los Angeles 18, Calif.Division of Textron Electronics, Inc MAIN PLANT: 400 S. Wyman St., Rockford, III., U.S.A.
APRIL 1964
- - - for more details circle 31 on post card73
NEW PRODUCTS
scuff -proof Texolite and the baseis equipped with retractable wheels.The unit weighs 40 lb. Price $299.Perma-Power.
FRAME GRID TUBES 212A family of multiple function,
decal -base tubes in which high per-formance frame grid tubes are corn-
bined with conventional grid typeswithin the same envelope to makepossible higher performance TV setsat lower cost is announced. Thefirst four types are: 6X9, 6U9, 6W9
easily servicetransistorradios...andmake money!
Model 960
ARANsSTu RADIO Ot.'N'i
ismwith Exclusive
Dyna-Trace Single -Point Probe and Built-in Metered Power Supply and VTVM.
awl( cineuits - Pt poimtaxy Iv a& ntimultThis is the way to profit from transis-tor radio servicing. There's no hit ormiss, no waste of time and work. TheB&K "960" Analyst gives you a com-plete transistor radio service shop inone easy -to -use instrument. It providessignal -generator, power supply,milliammeter, VTVM, battery tester,ohmmeter, and both in -circuit and out-
of -circuit transistor tester-all in one.Also speeds servicing of tube -typeradios. Brings you new customers, andnew profit. Net $9995
Unique Point -to -Point Signal InjectionEasily enables you to troubleshoot any stageof any transistor radio-fast.Built-in Metered Power SupplyMakes it easy to operate radio under test.Provides from 1 to 12 volts in 11/2 volt steps.Supplies bias taps.Simplifies In -Circuit Transistor TestDyna-Trace single -point probe needs onlythe one contact to transistor under test.Gives fast, positive meter indication.Built-in VTVMIncludes essential high -input -impedancevacuum -tube voltmeter for correct servicing.Test All Transistors Out -of -CircuitMeter has "good -bad" scale for both leakageand beta; and direct -reading beta scale.Also automatically-determines NPN orPNP. Meter is protected against accidentaloverload and burn -out.
See Your B&KDistributoror Write for
CatalogAP2I-T
BaK MANUFACTURING CO.DIVISION OF DYNASCAN CORPORATION
1801 W. BELLE PLAINE AVE. CHICAGO 13, ILL.Canada: Atlas Radio Corp., 50 Wingold, Toronto 19, Ont.Export: Empire Exporters, 253 Broadway, New York 7, U.S.A.
and 6V9. The 6X9 consists of ahigh -mu triode and a pentode. The6U9 consists of a low -mu triode anda pentode. The 6W9 is a doublepentode. The 6V9 is a heptode-triode. Detailed information as wellas general applications assistanceare available from the manufacturer.Amperex.
MICROPHONE CONNECTOR 213The Type ST -24 microphone
connector (molded 2 -pin) is an-nounced. It is said the connector
cable assemblies are ideal for useon microphones, tape recorders, am-plifiers, test equipment, computersand many other product applica-tions. Construction features includecomplete shielding, 360 deg strainrelief and integral molded plug con-struction which provides a superiorstrain relief, protection againstmoisture, minimization of noise andelimination of shorts, according tothe maker. Switchcraft.
CONTACT BURNISHER 214"Non -Residual" contact burnish-
ing tool is said to leave no filings,grit, or dust on the contacts. This
heavy-duty burnisher has been de-veloped for any type contact-sil-ver, platinum, gold, palladium,tungsten, molybdenum, and allprecious metal contacts. Blade is1/4 x .010 x 31/4 in. Trial packageof 10, N318S-10, $4.50. Neuses.
VTVM 215The model 805 VTVM Tele-Volter
is announced. It is said taut bandsuspension eliminates pivots andjewels, pivot friction and error dueto pivot fall -over. The meter maybe operated in any position withoutdegrading performance and is four
- - - for more details circle 16 on post card74 ELECTRONIC TECHNICIAN
ELECTRONIC
ELECTRONIC
9ELECTRONIC
ELECTRONIC
ELECTRONIC ELECTRONIC
why stock two? Raytheon gives you both in one carton
Raytheon's International line puts high quality and highprofits in one neat package - where they belong!Raytheon International tubes are designed, manufac-tured and tested by selected foreign producers in accord-ance with Raytheon specifications and U.S. industrystandards. Characteristics are controlled for exact inter-changeability and newer types are continually beingdeveloped to keep pace with your replacement needs.Right now, for example, 92% of all socket requirements
can be filled immediately by Raytheon International's284 types.Raytheon's 40 years of experience plus the Good House --keeping Seal of Approval provide your customers withthe finest warranty in the business. Add a good healthyprofit margin for you and you have all the reasons forstocking and selling Raytheon's International line. Seeyour Raytheon Distributor for complete details.
RAYTHEON
- - - for more details circle 48 on post card
NEW PRODUCTS times more sensitive than conven-tional movements, it was reported.Specifications: 6 in. meter face; acaccuracy 5% of full scale; dc ac-curacy 3% of full scale; frequency20 cps to 3 Mc; input resistance10 M. Ranges dc 0 - 1 - 5 - 10-100 - 500 - 1000; RMS 0- 1 - 5-10 - 50 - 100 - 500 - 1000; P - P0 - 2.8 - 14 - 28 - 140 - 1400-2800. Jackson.
INTRUSION ALARM 216Announced is an attache-case-
SEND THE HANDY COU-PON INDICATING YOURNEEDS
RO H NManufacturing
Co.BOX 2000
PEORIA, ILLINOIS
ROHN
The mop/ Famous Illgme inTOWERS of AU 141/100Here are the advantages you getwhen you insist on
ROHN TOWERSLARGEST FULL RANGE OF TOWERS-you can get any-thing from home TV and amateur radio towers toheavy-duty communication and micro -wave towers.Included are 500 foot self-suporting towers, 1,000foot guyed towers, "fold -over' and crank -up towers.Regardless of your needs, ROHN can supply it.UNQUESTIONED LEADERSHIP IN DESIGN AND MANU-FACTURE-you get the latest in advanced tower engi-neering. All communication towers are engineeredto EIA specifications, and are proved by thousandsof installations. No other manufacturer can surpassthe quality and fine reputation of ROHN.QUALITY MATERIALS AND WORKMANSHIP-Only high-est quality steel is used which fully meets the speci-fications for the job. ROHN towers are hot -dippedgalvanized after fabrication-a feature ROHN pio-neered!
SERVICE WHEREVER YOU WANT IT-ROHN represent-atives are world-wide. Complete erection service forcommunication systems, broadcasting, micro -wave,and other needs is available; also competent engi-neering service to help you.
Settle for the BEST In TOWERS-ROHN-today theworld's largest, exclusive manufacturer of towers ofall kinds!
Also available: Rohn Lighting Kits, Microwave Pas-sive Reflectors, Tower Installation Service and En-gineering Assistance. Representatives World -Wideto Serve You.
For your needs, contact your local ROHN salesman,distributor or dealer; or write direct for information.
1Send rn complt litoratur on th following ROHN Products:
L Home TV Towers Amateur TowersCommunication Towra AM -PM Broadcasting TowersMicroWave Towrs 0 Government
Name
Firm
Address
City State
".World's Largest EXCLUSIVE Manufacturer of Towers; designers,engineers, and installers of complete communication tower systems."
- - - for more details circle 50 on post card
size model ultrasonic intrusionalarm known as Mini -Guard. The8 -lb unit is designed for temporaryor permanent protection of door-ways, display cases, small offices orother rooms, hotel accommodations,closets, files, safes, etc. When plug-ged into a wall outlet and switchedon, the unit emits inaudible ultra-sonic waves. This high frequency"silent sound" saturates a zone ex-tending to 12 ft in front of the unit.Or, if desired, the sensitivity can beadjusted so that the alarm will betripped only by activity within acloser range. Walter Kidde & .Co.
SANDERS 217It is announced that sanding belts
and discs have been added to thisline of hand power tools. Items
include: Paper back -garnet belts,3 by 18 -in. with extra fine #120and fine #80 grit; three heavy dutycloth back aluminum oxide beltsin fine #80, medium fine #60 andmedium #50 grit. Three paperback aluminum oxide discs, opencoat, 7 in./dia with 7/8 -in. hole,come in extra fine #120, fine #80and medium #50 grit. Same sizealuminum oxide discs, except withfibre back for heavy duty sandingare available in four grits. The gritsinclude, fine #80, medium #50,coarse #36 and extra coarse #24.The sanding discs are packaged 25in a box. Wen Products.
STEREO SPEAKER 218A "divergent lens" speaker sys-
tem is said to allow the listener toenjoy the highest stereophonic musicfidelity from anywhere in the room.A sound radius of 360 deg disper-
76 ELECTRONIC TECHNICIAN
et
not harder
Subscribe to PHILCO® TECH DATA the smart way to servicing profits
If you are working as hard as you can, it's time to switch to working
smarter, with the most up-to-date, factory accurate, complete source
of Philco Technical Information right at your fingertips. Philco's new
TECH DATA Subscription is an invaluable source of servicing knowl-
edge and technical data ... faster, more accurate and at lower cost
than from any other source. You get the complete, full year's supply
of Philco Technical Information; service manuals, specifications,
schematics, wiring diagrams, parts lists and production change bul-
letins promptly and direct ... to give you the right servicing informa-
tion when you need it, to help you make your business hours more
productive, more profitable.
F Subscribe now to PHILCO TECH DATA(Electronics, Appliances or Laundry) Single Data Subscription $7.50
Special 1/2 Price Offer PHILCO SERVICE BUSINESSMAN(with subscription to Philco Tech Data) Only $1 per yr.
7
The serviceman's most reliable, progressive magazine for helpful businessinformation, servicing management articles as well as technical and servic-
Ling articles.
PARTS AND SERVICE OPERATIONS
PHILCOA SUBSIDIARY OF C.57/tTied_461-earKrinlia/r/yD
- - - for more details circle 43 on post card
MAIL THIS COUPONTo: Philco Parts and Service Operations-C
CHECK SUBSCRIPTION DESIREDEl ELECTRONICS E APPLIANCE 0 LAUNDRY
@ $7.50 @ $7.50 @ $7.50
(Single subscription, $7.50, two categories; $13.50; three categories $18.50)
TODAY!& Tioga Sts., Phila. 36, Pa.
SUBSCRIPTION ORDER-PHILCO TECH DATA1964 (Jan. 1 to Dec. 31)
Firm Name
E PHILCO Service Businessman Magazine, Special Subscription Rate $1.00(with Tech Data Subscription) Your Name
Make check or money order payable to Address
PHILCO Parts & Service Operations, forTOTAI through local distributor. City State lip Codeprocessing your
UnexcelledPerformance!
Suggested List: $149.50
Hallmark 512SMART STYLING! RUGGED RELIABILITY!
The Hallmark 512 has been designed andmanufactured to give consistent unexcelledperformance even under the most severeconditions. It features dual -power, 12 chan-nel crystal -controlled, push -to -talk operation.Sensitivity better than 0.312v for 10 db S/Nratio. Selectivity better than 30 db. RF powerover 3.2 watts. Audio power 3 watts. Topquality components in rugged hand -wiredchassis. 26.965 to 27.255 mc. High-levelmodulation, improved low -noise front end."S" meter and neon modulation indicatorstandard.
?Wow! from Hallmark.::.
Mostadvanced
transceiver testeravailable ! I.
only $49.50Here is the most versatile and reliable testinstrument of its kind -a crystal -controlledsignal generator for low power transceivers.It was specifically designed to assist thetechnician in installation and servicing oflow power transceiver. Measures: RF power(absolute) 0 -5 w.; 0 -120% amplitudemodulation; VSWR. Produces a 100 mw car-rier (with or without amplitude modulationof a 1000 cps tone) for checking receivers.Use as a field strength meter.
11-1.....
HALLMARK INSTRUMENTS6612 Denton Drive, Dallas 35, Texas
- - - for more details circle 34 on post card
PRODUCTS
sion eliminates the need for pains-taking location and balancing ofspeakers, the report indicated.Known as the "Grenadier," specifi-cations indicated the speaker canhandle up to 100 w of music power;frequency response, 30-20,000 cps,nominal impedance, 80, 12 in.woofer, mid -range and tweeter.Overall dimensions, 151/4 x 29 in.Weight 65 lb. Price $180. EmpireScientific Corp.
DEFLECTION YOKES 219Replacement deflection yokes
with toroidal windings are an-nounced. Three models are avail-
able for replacement of toroidaldeflection yokes in several TVmodels. Instruction sheets contain-ing technical and installation dataare included with each yoke. Prices:$9.50 for No. YT -101, $9.80 forNo. YT -102-2 and $11.00 for No.YT -103-1. Triad.
UHF AMPLIFIER 220A mast -mounted amplifier to
cover the UHF band is introduced.Called the Able -U2, it has two
transistors to boost signal strengthon all UHF channels, giving it primeutility in fringe reception areas, itwas said, and can be used with anyUHF -TV receiver or converter.Power is supplied by the remotepower supply unit at 15 v, on thesame twinlead that brings the signaldown from the amplifier, the makersaid. Blonder -Tongue.
TUBE SOCKETS 221A line of noval and miniature
tube stand-off printed circuit socketsfor 1/16 in. boards is announced.The sockets are supplied in fourtypes: general purpose black phe-nolic or mica -filled low loss pheno-lic, with or without center shields.Each has snap -in contact tails to
NEW PRICES from
1the oldest, mostwidely proved and
sold radio and TVlubricant
oz. bottlewith dropper
LIST
$1.49LIST
4 oz. bottle 2 54LIST
4 (otfieubsttr!!'c a p) 2.64LIST
8 oz. bottle
e oz. spray can -El - with extender
3 _oz;v7tfazdnceander
5 07LIST
2.79LIST
1.79
Quietrole is your guarantee of themost effective, quick silencer ofnoisy radio and TV controls - thequality product that Is a top value.Get Quietrole at quality jobbers.Some territories still availablefor experienced representation.
manufactured by
QUIETROLE CompanySpartanburg, South Carolina
- - - for more details circle 47 on post cardELECTRONIC TECHNICIAN78
It used to take 2 men to pulla color TV set into the shop...
T..,Cuts your manhours on Color -TV home service calls
Here is a real "must" for anyone servicing or planning toservice color TV sets.
No longer must you send two men to a customer's hometo pull in his entire color set. Now, one man can simplyremove the chassis and bring it back to your shop fortesting, troubleshooting and alignment in your RCA ColorTV Test Jig.Look at some of the extra advantages built into this money-saving unit:
Minimizes costly damage claims. Pulling chassiseliminates possibility of scratching or damaging a cus-tomer's cabinet when transporting it to and from hishome. Saves time. Eliminates need to reconverge a cus-tomer's set when chassis is returned. Convergencecontrol panel on Test Jig provides static and dynamicconvergence for CTC-10, 11, 12 and 15 chassis. Versatile. Can be used with CTC-4, 5, 7, 9, 10, 11,12 and 15 chassis. Safe. Supplied with factory -installed safety glassand kine mask. Complete components kit, supplied with unit, pro-vides all necessary service components and instruc-tions for installing RCA Color Picture Tube. Professional appearance. Finish matches that ofyour other RCA test instruments.
APRIL 1964
The RCA Color TV Test Jig is available through your Author-ized RCA Parts and Accessories Distributor. See him thisweek to find out how this versatile instrument can helpyou capitalize on the growing Color TV servicing market.
For information on where you may obtain the RCA ColorTest Jig, and for additional specifications, fill out and mailthe coupon below.
RCA PARTS AND ACCESSORIES, CAMDEN, N.J.
1
The Most Trusted Name in Electronics
RCA Parts and AccessoriesP.O. Box 654, Camden, New Jersey
Phase send me full specifications on the RCA Color TV Test Jig, Stock No.
11A1015A, and the name of the nearest distributor where I may obtain it.
Name
Company or Service Shop
Address
City Zone State
1
79
MnegardDealer of the month
Lloyd Shankle says, "TheWinegard antenna is easy toinstall, well built for windareas and out performs othertypes of antennas."
Winegard salutesShankles United TV
of Fort Collins, Colorado
Mr. Lloyd Shankle, known to cus-tomers as "Red", has operated avery successful appliance and serv-ice business for 12 years. Based atFort Collins, he covers an area of 25miles.Fort Collins is the home of ColoradoState University so Red Shankle hasthe advantage of employing part-timeassistants who are students at the uni-versity. Mr. Shankle and his wife,Velda, run the business.He reports outstanding performancefrom the Winegard C44 -C43 -C42 an-tennas. He says, "The LarimerCounty Hospital has a C44 with abooster and 70 outlets and we are get-ting good reception on all channels."He adds, "The Winegard is easy toinstall, well built for wind areas andout performs other types of antennas.I have installed these antennas inhomes, hospitals and hotels, also onColorado State University buildings.""The quality of Winegard equipmentis good-which I feel is very impor-tant for any business large or small.I can stay in business by sellingWinegard-top quality material."
Winegard Co.Antenna Systems
D3019 -D Kirkwood Burlington, Iowa- - - for more details circle 60 on post card
80
NEW PRODUCTS
provide mechanical retention priorto soldering. Center shields are ofbrass, hot solder dipped. Cinch.
EPDXY SOLDER 222A one -component epoxy silver
cold solder is announced. It is saidto bond the most delicate electronic
devices without mess, heat or sol-dering irons. The all -in -one con-ductive compound comes alreadycombined with the hardener, re-quires no heat or tools to applyand hardens at room temperaturein 24 hours, the report said. An-chor Alloys.
PORTABLE RECORDER 223A self-contained, portable, bat-
tery operated, transistor tape re-
corder, model 101, is announced.It weighs 7 lb and uses "D" typeflashlight batteries. Frequency re-sponse is 80-8000 cps, it is said.It can record from a radio, phono-graph, or TV as well as the micro-phone by using a special input jack.The unit operates at 1 7/8 in./secand will provide up to two hoursplaying time on a single 4 -in. reel,according to the maker. The record-er measures 11 x 33/4 x 8 in. NorthAmerican Philips.
TOOL CARRIER 224A leather tool bag for TV -radio
service, repair and maintenancework is introduced. Made of top-
grain cowhide, the upper sectionholds large tools, parts, meters, in-struments, tubes, etc. Lower sec-tion has three sliding metal trayswith a variety of divided compart-ments for small parts and tools.Available in black or ginger color.Outside dimensions: 17 x 111/2 x51/4 in. Can be equipped with anoutside pocket, for service books,manuals and papers. K. LeatherProducts.
STEREO ANALYZER 225A portable FM servicing instru-
ment, model MX129 is said to pro-vide all of the signals generated by
the FM stereo station under crystalcontrolled conditions. A built-inmeter, calibrated in db andP -P v, enables the user to set theleft and right channels and 19 kc
ELECTRONIC TECHNICIAN
"It's there in hoursand costs me less
...that's why I specify Greyhound Package Express!"When you've got to get a shipment, and you've got toget it FAST... specify Greyhound Package Express.Your order travels aboard a regular Greyhound bus,on fast, frequent schedules.
With Greyhound Package Express, your inventoryis as large as the warehouse that ships it. You get whatyou need when you need it-quickly, easily, economi-
cally. Greyhound Package Express rolls 365 days ayear, twenty-four hours a day, week -ends and holi-days. Convenient C.O.D., Collect, Prepaid or specialcharge account service, too.
For information on service, rates and routes, callGreyhound or write today: Greyhound Package Ex-press, Dept. 53D, 140 S. Dearborn St., Chicago 3, Ill.
It's there in hours...and costs you lessFor Example: Buses Daily Running Time 20 lbs. 30 lbs. 40 lbs.
BOSTON -NEW YORK
20 5 hrs. 15 min. $1.80 $2.10 $2.30
LOS ANGELES -SAN FRANCISCO
28 9 hrs. 20 min. 2.10 2.45 2.80
DALLAS -SAN ANTONIO
10 7 hrs. 15 min. 1.90 2.15 2.45
CINCINNATI -LOUISVILLE
14 2 hrs. 40 min. 1.50 1.70 1.95
"Other low rates up to 100 lbs.
One of a series of messages depicting another growing service of The Greyhound Corporation.- - for more details circle 33 on post card
APRIL 1964 81
...for consistentlyaccurate bandpass
circuitry checksAt last . . . RCA puts into yourhands complete equipment for over-all alignment checks that pinpoint afaulty circuit accurately and rapidlyin black -and -white or color re-ceivers. No more temporary circuitswith uncertain results. Use bandpassanalysis easily on every job and cutout unnecessary component checks.
RCA provides you with five newclearly labeled alignment probes:(1) Video Detector Test Block (2)IF Test Block (3) Sound DetectorTest Block (4) Mixer Grid Match-ing Pad (5) Tuner IF Input Head.All have "E-Z" Hook tips thatpractically eliminate accidental short-ing of circuitry and simplify hook-up and disconnection. All are sin-gle unit construction, enclosed in aplastic case, with shielded leads.
RCA Alignment Probes . . . theessential service equipment! Fromyour authorized RCA Parts andAccessories Distributor, or writeRCA Parts and Accessories, P.O.Box 654, Camden 1, N.J.
eflA The Most Trusted Name
oVifr in Electronics
NEW PRODUCTS
pilot level, the report said. Themeter can be used to read separationof the channels at the speakers orat other test points in the receiver.Price $169.50. Sencore.
MIKE STAND 226The model DS -14 microphone
desk stand, designed to complementpopular types of elongated micro-
phones, is announced. The deskstand includes a fine grain gunmetalshrivel finished base, styled in a con-temporary motif, and a 3 in. pol-ished chrome upright which termi-nates in a standard 5/8 in. - 27accurately machined thread. Pro-tective felt base pads prevent dam-age to table or desk surfaces, it wassaid. Atlas Sound.
. . . TOUGH DOGS
Continued from page 62
left connected to the plate of thetube. When the set was switchedon the next time, the ripple wasobserved on the scope even beforethe circuit had warmed up tonormal temperature.
This led to the solution of theproblem. All the screws around theprinted board were tightened anda couple of grounding wires weretaken from the print ground to themain chassis for good measure.
The ac was completely elimi-nated.-R. S. Bartlett, Windsor,Ont., Canada.
NEW BOOKS
CLOSED CIRCUIT TV SYSTEMPLANNING. By Morris A. Mayersand Rodney D. Chipp. Publishedby John F. Rider Publisher, Inc.250 pages, hard cover. $10.00.
Closed circuit TV installationscontinue to increase in factories, inoffices, schools, hospitals, depart-ment stores and many other busi-ness and industrial areas. This bookprovides the information needed todecide intelligently where and howa particular organization can bestuse CC -TV. It discusses systemconcepts in detail. It is neither anengineering nor a technicians' text-especially written to give man-agement the facts-but it can beused profitably by TV -radio tech-nicians who sell, install and main-tain CC -TV systems. The text isdivided into three parts. Part Icovers applications of CC -TV; PartII tells how CC -TV works and PartIII deals with equipment. Every-thing you need to know for answer-ing prospective customer questionswill be found here. And you willfind a lot of idea -triggering informa-tion to help you make a success ofthe business.
BASIC TELEVISION PRINCI-PLES AND SERVICING. ThirdEdition. By Bernard Grob. Pub-lished by McGraw-Hill Book Co.,Inc. 653 pages, hard cover. $11.95.
Fast-moving space-age develop-ments have created a relatively longtime-lag between the lab, the fieldand printed page. Hence, frequentlyrevised and updated texts are neces-sary to pace new technological con -
"Necessary repairs, $4.50. Repairing yourhusband's repairs, $10.95 . . ."
82 ELECTRONIC TECHNICIAN
Yellow Pages
This emblem brings action
HIG 4
K5LJ
MN60
PRS
DE3F
ABC2
I
AT9
8TV v
Display this Yellow Page emblem freely. Itmeans business...it reminds prospects tolook for your ad when they're ready to buy.
And people who read the Yellow Pages areready to buy. (Aren't you when you look inthe Yellow Pages?)
*That's if you're in the Yellow Pages. If not, call your Yellow Pages man -
APRIL 1964
he's in the Yellow Pages under ADVERTISING- DIRECTORY & GUIDE.- - - for more details circle 10 on post card
83
To kit builders who go
through THICK and THIN
to get the best ...
SEND FOR THE THIN!You don't judge a book by itscover. Nor by the number ofpages. If you're looking forweight, don't bother with theConar catalog. But if you'relooking for quality electronickits backed by a no -loopholesguarantee, you'll want our carefulselection of do-it-yourself andassembled units. There's some-thing for everyone: TV set kitsto transistor radios, VTVM's toscopes, tube testers to tools. Foryears of pleasurable perform-ance, for pride in assembly, mailcoupon. Discover why Conar, adivision of the National RadioInstitute, is the fastest growingentry inkit andequipmentbusiness.
IIIMIIIIIIIMAIL NOW!MIIMEDD4C
13939 Wisconsin Ave., Washington 16, D.C.ICONAR
IPlease send me your catalog.
Name
Address
City Zone State
NEW BOOKS
cepts. This is a thoroughly updated,revised and expanded edition of abook first published in 1949. Re-flecting latest TV advances, thisedition contains many pages of ad-ditional material. The color TVsection is double that of the previousedition. New material covers VHFand UHF tuners and remote con-trol equipment. The book is ar-ranged clearly and logically, pro-gressing from simple to more ad-vanced concepts in a gradual, easy -to -understand manner. The 25chapters are, in effect, a TV tech-nical encyclopedia. The chapter onTV servicing gives symptoms fol-lowed by analysis steps. Brief sum-maries, self-examination and essayquestions appear at each chapterending. The book is designed toprovide maximum aid for studentsand expert technicians too. It isprofusely illustrated with photos,drawings, schematics and charts. Acursory review indicates that we canrecommend it without reservation-despite some redundancy remi-niscent of formalized writing stylespre -dating the space-age knowledge -explosion.
MARINE ELECTRONICSHANDBOOK. Second Edition.By Leo G. Sands. Published byHoward W. Sams & Co., Inc. 288pages, soft cover. $4.95.
This is a revised and updatedsecond edition of a book first pub-lished in 1959. While technicalin nature, it is not limited to thetechnician. The boat owner willfind it very valuable. Of particular
ko*/"I see the error . . . I got some picofaradsmixed in with the dollars."
FULL FIDELITYHI-FI SPEAKERSSlim -line styling! Ceramic magnets!Superb reproduction over the full audiospectrum! Complete choice: coaxials,extended range, tweeters, woofers! Thenew Quam hi-fi line is as modern astomorrow-and it's designed to offer theserviceman a top-quality product at a listprice that's lower than others' "audiophilenet." (Quam never advertises net prices-to protect your mark-up!)
Use Quam Hi-Fi Speakers in newsystems, as extension speakers in existinghi-fi systems, and as replacement improve-ments in stereo consoles. They'll openyour way to exciting new sales!
Write for your free copy of the newQuam Hi-Fi Catalog HF-64.
QUAM-NICHOLS COMPANY234 lEist Marquette Road Chicago, III. 60637
- - - for more details circle 25 on post card - - - fo- more details circle 46 on post card84 ELECTRONIC TECHNIC IAN
In their homes, yourcustomers are being pre -sold on
RCA Radio Batteries over network TV...on Walt Disney's "Wonderful
World of Color."
BATTERIE
...orct,c
In your store, thesecompact counter merchan-
disers continue that pre -sellingright at the point -of -
purchase.
NETWORK -TV ADVERTISINGDuring the key summer months, network -TV com-mercials will be carrying RCA Battery Advertisinginto over NINE MILLION homes...to over 21
MILLION viewers*. Get the most out of the radiobattery business with the name your customersassociate with radio... RCA.
COMPACT COUNTER MERCHANDISERSHere's the way to take a single foot of counterspace and really put it to work. Any one of theseattractive merchandisers effectively displays RCABatteries while creating strong RCA brand recog-nition. Such a merchandiser, with pilfer -proof plas-tic front face, creates a real battery showcase.
For self-service operation, there's RCA's award -
winning blister -packaging. New to the battery busi-ness? Then pick an RCA pre -packed battery assort-ment as a start.
See your Authorized RCA Battery Distributor orwrite: Battery Department, RCA Electronic Com-ponents and Devices, Harrison, N. J.*Estimate of average viewing audience per show during June,July and August based on Nielsen National Television Index.
The Most Trusted Name in Electronics
APRIL 1964 85
the best seat in the house...... and it's right in every living room if the FM
is equipped with a
FRICO6AWARD WINNING FM ANTENNABroadcasting authorities agree that an outdoor antenna isabsolutely essential for the reception of full quality monauraland multiplex FM sound.
A FINCO FM antenna will deliver a clean undistortedsignal and bring in more stations, regardless of location.
Guarantee the best seat in the house for tonight's FM con-cert ... install a fidelity -phased FINCO FM antenna.
IllustratedFM 4
$24.90 list
THE FINNEY COMPANYPRODUCERS OF THE WORLDS FINEST FM AND TV ANTENNAS
34 West Interstate, Bedford, Ohio
Other modelsavailable from$3.75 to $71.30
FM Electronic BoosterModel T-AMB-AC$34.95 List
Write for Bulletin #20-213.
NEW BOOKS
interest will be the listing of CoastGuard Stations, monitoring theSafety and Calling frequencies, thestations transmitting weather andstorm warnings and the listings ofradiobeacon stations. The 10chapters include those on MF/HFRadiotelephones, VHF Radiotele-phones, CB Radio, Radio DirectionFinders, Depth Sounders, SteeringDevices, Rules and Courtesy, Ma-rine Radar and others. The bookis well illustrated with photos, sche-matics and drawings.
Color Song
Sing a song of color,Red and blue and green -Here's the worst convergenceMy eyes have ever seen!Dots to my left,Dots to my right,Doesn't seem to be a oneThat looks as if it's white!
Sing a song of color,Blue and green and red,Ev'ry time I look at itI wish I'd stayed in bed!Twiddle with the amplitude,Fiddle with the tilt,Whoops! The slug's gone through
the coil -The tool's up to its hilt!
Sing a song of colorRed and green and blue,Think I'll take it to the shop -An overhaul is due:Set the coils up inside,Try the ones behind,I hope it turns out fairly well . .
Too bad I'm color blind!Reg Bartlett
MOVING?Be sure to let us know yournew address. Please enclosea complete address labelfrom one of your recentissues.
- - - for more details circle 29 on post card86 ELECTRONIC TECHNICIAN
UNI-TITE SUPER
SERVICE CENTER
COVERING OVER
GODREPLACEMENTS
The new CLAROSTAT Super -Service Center providesthe right RTV replacement at your fingertips. Cabinetcontains 19 panel and 32 rear units, 3 switchesand an assortment of shafts. Saves trips-saveslong waits for replacement controls. Available fromyour distributor today only $61.30 net with freeRGC-5 Guide.
1-Click in proper shafts.
2-Slide units together. 3-Twist 90°.
FIELD -ASSEMBLED SERIES DA
DUAL CONTROLS FOR AUDIO
SERVICING OVER
44C/SINGLE - SHAFT
CONTROLSA complete line of field -assembled dual controls(operating on a single shaft) for all audio require.ments. Easy and profitable way to make those exactcombinations for hi-fi-stereo and sound systems.Cabinet offers 21 panel and 21 rear units and a widevariety of shaft configurations. $49.95 at yourClarostat distributor.
Select panel andrear units. Pick suit-able shaft.
DISTRIBUTOR SALES DIVISION
Slide units together,twist 90° and click.Assembly automati-cally locked.
Your replacementunit is now ready toinstall in a jiffy.
CLAROSTATCLAROSTAT MFG. CO., INC. DOVER, NEW HAMPSHIRE
- - - for more details circle 24 on post card
APRIL 1964 87
Get the mostout of your
scope ... read
by Rufus P. Turner
Owning an oscilloscope and getting its full po-tential are two different things. This up-to-dateguidebook consisting of two volumes makes yourinvestment in your scope really pay off. If you'reabout to buy a scope, it gives you a greater famil-iarity with its operation and helps you select thetype of scope best suited to your needs.This practical Rider book avoids electronic fun-damentals and theories except where a brief digestis essential to understanding an application. Tech-nical jargon is kept to a minimum and skeletoncircuits and block diagrams are used instead ofdetailed circuits. Step-by-step directions with illus-trations make the various tests and measurementsabsolutely clear.VOLUME I explains applications of oscilloscopesparticularly of interest to general technicians.radio operators and hobbyists. To get off to a goodstart towards understanding your scope, the initialchapters describe the operating principles, struc-ture and characteristics of the instrument. Thenfollows valuable step-by-step directions for testsand measurements. These include tests of a generalnature (current, voltage, frequency, phase) andspecialized applications (amplifier, receiver, andtransmitter testing).VOLUME II considers the applications of the scopein industrial and scientific application. It givesunusually clear guidance in using the scope forspecific tests and measurements covering suchareas as measuring physical quantities (vibration,noise, acceleration, etc.) ; checking components(electronic and electrical) ; and checking perform-ance of electronic and nonelectronic devices (fromelectrical generators to cameras and gas engines).While most of the tests described require relativelysimple scopes, some require oscilloscopes havingspecial features. Thus you have an excellent guideto the type of scope you will need for your work.#339 2 vols. paper, $5.90; #339-H cloth, $6.95.
Now available1964 TUBE -CADDY TUBE SUBSTITUTION
GUIDEBOOK by H. A. MiddletonMore useful than ever because it contains moredirect replacements. Fits in your tube -caddy. Spe-cial 16 -page section on cathode ray tube substitu-tions. Still only 90c
Available at parts distributors,or use coupon to order.
r-..10 -DAY FREE EXAMINATION...-IJOHN F. RIDER PUBLISHER, INC.Division of Hayden Publishing Inc.116 West 14th St., New York, N.Y. 10011Please send books checked below. Within 10days of receipt, I shall remit payment pluspostage, or return books without obligation.PRACTICAL OSCILLOSCOPE HANDBOOK -2 Vols.El paper $5.90 cloth $6.95[11 TUBE CADDY -TUBE SUBSTITUTION
GUIDEBOOK, 90c
Name
Address
City Zone State Payment enclosed. We pay postage. Free 1964 catalog of RIDER BOOKS
- for more details circle 49 on post card88
It Only Looks Like
AGCThree case histories show that
classical AGC symptoms are frequently
caused by other malfunctions
One of the more troublesomeproblems TV technicians encoun-ter is in Automatic Gain Controlcircuitry. But time wasted in"running down" difficulties can besaved by learning to recognize thesymptoms. Too often, what firstappears to be AGC trouble, turnsout to be an RF/IF componentfailure.
Case Histories
Take the case of a Zenith19A20 chassis which came into
Fig. 1-Open RF choke caused a capacitoreffect and cancelled out AGC.
Fig. 2-Clamping re-sistor value changedwith ambient tem-perature of set.
F i g . 3-Defective8200 decoupling re-sistor throttled AGCin this receiver.
the shop with a bad service his-tory. The trouble looked like AGC-silvery picture, with loss of syncand a tendency to go negative. Acursory circuit check revealed noAGC, but with a good horizontalspike coming in.
When the AGC control wasturned either way off center, thepicture would come in faintly fora short time, then drift slowly backto the same symptoms. This in-dicated that the keyer wanted togo to work, but something waspreventing it. The use of a biasbox didn't help the picture, but itdid apply AGC to the IF tubes andpermit tracing video. There was agood signal to the detector, butnothing was coming out of the di-ode.
Digging a little deeper in thisstage disclosed an RF choke run-ning from the top end of the IFtransformer and out the bottom of
6AM8
IF AGC
TUNER
68M
r
CONTROLCONTRAST
I UM1
11:2M7
TO VOT CATHODE
200Kn.
TO VIDEOAMP
ELECTRONIC TECHNICIAN
You probably thoughttop quality electronictest instrumentswere too expensive...didn't you?
Well, they're not when youbuild them with money -saving RCA kitsYou've known right along that you can save money on electronictest instruments by building from kits.
But you may have shied away from kits because you thoughtthey involved complicated calibration or adjustment problems.Forget it!RCA kits are inexpensive, of course, but they're also easy tobuild. Build them right and they'll give you the best performanceyou can buy in their price range.
What's better about RCA test instrument kits?
Ease of assembly is one thing. Parts are clearly identified. Eachassembly diagram appears on the same page as the step-by-stepinstructions for that section of assembly. There's no need to referback constantly to other pages, which consumes time and in-creases the chance of error.
Ease of alignment is another thing. Each kit contains completeinstructions for accurate calibration or alignment of the instru-ment. Where necessary, precision calibrating resistors are pro-vided for this purpose.
What does it mean? It means that with RCA kits you can get aprofessional V -O -M or VTVM for as little as $29.95*. Or you canget a good oscilloscope (one of the most useful-but normallyone of the most expensive-test instruments) for only $79.50*
RCA VOLTOHMYST®. The mostpopular VTVM on the market.WV-77E(K). Kit price: $29.95*
RCA RF SIGNAL GENERATOR. Foraudio and TV servicing.WR-50A(K). Kit price: $39.95*
Specialized instruments such as an AC VTVM or an RF SignalGenerator are also available as kits for far less than they wouldcost otherwise. In every case, RCA kits, when completed, areidentical with RCA factory assembled instruments.
WINO awe* dew. ...
Each sub -assembly is described in a separate section with illustrations applyingto that sub -assembly available at a glance. No cross referencing necessary.
LOOK WHAT'S AVAILABLE TO YOU IN KIT FORM:
RCA SENIOR VOLTOHMYST.A professional VTVM.WV-98C(K). Kit price: $57.95*
"e°111111.111"1P-RCA TV BIAS SUPPLY. For RF, IFalignment in TV sets.WG-307B(K). Kit price: $11.95*
RCA VOLT-OHM-MILLIAMMETER. RCA 3 -INCH OSCILLOSCOPE. Com-One of most useful instruments. pact, lightweight, portable.WV-38A(K). Kit price: $29.95* WO-33A(K). Kit price: $79.95*
RCA TRANSISTOR -RADIO DYNAM-IC DEMONSTRATOR. For schools.WE-93A(K). Kit price: 539.95"
RCA V -O -M DYNAMIC DEMON-STRATOR. A working V -O -M.WE-95A(K). Kit price: $37.95*
RCA HIGH -SENSITIVITY AC VTVM.Doubles as audio pre -amplifier.WV-76A(K). Kit price: 557.95*
See them all-and get full techni-cal specifications for each-at yourlocal Authorized RCA Test Equip-ment Distributor. Or write for in-formation to: Commercial Engi-neering, Section D -46-W, RCA ELEC-TRONIC COMPONENTS AND DE-VICES, HARRISON, N. 1.
*User price (optional)
RCA ELECTRONIC COMPONENTS AND DEVICES, HARRISON,N.J.
The Most Trusted Name in Electronics
the can to a tiepoint, then over tothe video amplifier as shown inFig. 1. The choke was open.Luckily, the end of the choke wasshowing just enough to latch ontoand anchor it securely to the pig-tail. The receiver went right towork.
In another instance, a popular19 in. portable (Philco 10H25through 12J27 chassis) would playan hour or so and then suddenlygo negative and develop a badphase shift. This receiver groupuses detected AGC and in check-
ing the schematic, Fig. 2, it wasnoted that a 6.8 MS2 1/2 w clamp-ing resistor went from the AGCline to the cathode of the verticaloutput tube. The resistor waschanging value with the ambienttemperature of the set. Replacingit resolved the problem.
Don't confuse this difficulty witha similar effect created by eitherthe 12AZ7 or 6CG8, sync clipperand sound limiter, located on thelower panel just under the secondvideo IF tube. When either ofthese tubes develops a partial
make it easy on yourselfSee the direct answer-on only therange -scale you want- automatically
WITHBURN -OUT PROOFMETER MOVEMENT
Sensitivity 20,000 ohms per volt DC; 5000ohms per volt AC. Accuracy ±3% DC; ± 5%AC; (full scale). DC Volts in 6 ranges0-6000. AC Volts in 6 ranges 0-6000. AF(Output) in 4 ranges 0.300 volts. DC Cur-rent in 5 ranges 0-10 amps. Resistance in4 ranges 0-100 megohms. Supplementalranges also provided on external overlaymeter scales. Meter movement protectedagainst extreme overload and burn -out.Polarity reversing switch. Automatic ohms -adjust control. Fuse -protected shunts. Mir-rored scale. Complete with 11/2 -volt and9 -volt batteries, test leads, and easy -view-ing stand. Batteries freshly packedseparately.
No Reading Errors!No Multiplying!
Just set the range switch, and onlythe scale you want in the exact rangeyou want appears automatically. In-dividual full-size wide -view scale foreach range-and only one range -scaleis visible at any one time. Reading isclear, easy-and direct. Net, $5995
DYNAMATIC375 VTVM
It's automatic! See only the full scale you wantand read the exact answer-directly. No multi-plying. Eliminates errors. Net, $8995
See Your B&KDistributoror Write for
CatalogAP21-T
BaK MANUFACTURING CO.DIVISION OF DYNASCAN CORPORATION
1801 W. BELLE PLAINE AVE. CHICAGO 13, ILL.Canada: Atlas Radio Corp.. 50 Win gold, Toronto 19, Ont.Export: Empire Exporters, 253 Broadway, New York 7, U.S.A.
short in the sync section, there isa phase shift and an upset of AGC.
The circuitry of an RCA KCS-133A portable is shown in Fig. 3.The symptoms indicated AGCtroubles on this set. It was a paral-lel heater receiver, so the keyingtube was pulled. No change oc-cured in video response, contrastremained fair, but the picture hada tendency to pull and lose sync.The first IF grid has a minus 11/2v signal biasing. A bias box didn'tchange things.
Further checking showed thisreceiver's first two IF stages werecascaded. A voltage check dis-closed that the first IF had only50 v on the plate instead of thenormal 120 v. The second IF hadthe normal 250 v. Its cathode,however, normally 125 v was only75 v.
The coupling network for thiscircuit was a module (Fig. 3). Inchecking across points No. 1 and5, it was found that the 82011 de-coupling resistor had greatly in-creased in value. By clipping outcontact No. 1 of the module andsoldering a new 1/2-w resistor fromcontact No. 5 to the PC board"button -hole" the set's operationwas restored to normal.
This receiver had been in threeother shops for the same problem.Giving the other shops the benefitof the doubt, maybe the resistorwas changing in value; or theshop's line voltage (loaded down byother sets on the cooking bench),was too low to make the symptomsappear. But if the difficulty, as thecustomer explains it, doesn't showup in a couple of hours' runningtime, however, it's advisable touse a variable ac supply and forcethe problem to reveal itself.Older Circuits
There are many receivers still inuse which have an AGC amplifier.This circuit can serve a triple pur-pose, as an AGC amplifier for aweak source of AGC, a voltage in-verter and a noise canceller.
If the second detector has apositive output, obviously this volt-age will have to be inverted forAGC. In some instances this cir-cuit may be nothing more than anac coupled plate -follower andused only to invert. In any case,it comes under AGC problems andshould never be taken for grantedor ignored.
L
- - - for more details circle 17 on post card90 ELECTRONIC TECHNICIAN
ALL THE INVENTORY YOU NEEDTO SERVICE ALMOST ANY TRANSISTOR CAR RADIO ON THE ROAD!simply say Delco
6 is the magic number! That's all it takes to replacemillions of transistors in car radios today! One ofthese Delco numbers will fit exactly the requirementsof most of your customers!
DS -25 and DS -26 cover small signal needs in Delcoand other auto radios. They also replace practicallyevery PNP transistor used in portable radios.
DS -501 and DS -503 restore the full audio power toDelco Radios.
DS -520 and DS -525 can be used in all non-Delcoradios and in place of DS -501 and DS -503 in oldercars where low cost is a factor.
Full instructions, application and cross referencecharts come with your order. Call your United Delcosupplier today.
Delco Radio Automotive Radio ServiceParts and Electro-Mechanical devices are distributednationally through 1[MnitedL Ealeco.
DELCO RADIO, Division of General Motors, Kokomo, Indiana
"United. %,Delco
APRIL 1964
- - for more details circle 26 on post card91
PART IILOOKING FOR A NEW LOCATIONContinued from March44. What is the road and highway
pattern in relation to the shop-ping center location? What isthe degree of accessibility fromeach direction?
45. What is the volume flow oftraffic along the road network?
46. Does the traffic flow freely with-out congestion? What is thestreet's maximum traffic? Has
it been reached?47. Are there any physical geo-
graphic barriers in any of thetrade area quadrants? Narrowroads? Lakes? Hills? Low speedareas? Will these discouragecontinuing patronage?
48. Will the cars entering and leav-ing the shopping center siteimpede traffic?
Asindispensableas a tube caddy
For high fidelity house calls
4k
Audio and high fidelity servicing is fastand simple with these two HeathkitGenerators on the job! Latest designfeatures and quality components assureaccurate, dependable test facilities foralignment and trouble -shooting at sav-ings of 50% or more! Order now andsave with Heathkit!Heathkit RF Signal Generator Kit Wide frequency range -covers 100 kcto 200 mc in six bands Prewired, pre -aligned coil-bandswitch assembly Largeeasy -to -read dial scales 2% accuracy Modulated or unmodulated RF output Fixed & variable output attenuators Easy to buildSPECIFICATIONS -Frequency range: Band A, 100kc to 320 kc; Band B, 310 kc to 1.1 mc; Band C, 1 mc to3.2 mc; Band D, 3.1 mc to 11 mc; Band E, 10 mc to 32 mc;Band F, 32 mc to 110 mc. Calibrated harmonics: 110 mcto 220 mc. Accuracy: 2%. Output: Impedance, 50 ohms;Voltage, 100,000 uv. Modulation: Internal, 400 cps. 30%depth; External, approx. 3 V across 50 k ohms for 30%.Audio output: Approx. 10 V open circuit. Tube comple-ment: (1) 12AT7, (1) 6AN8. Power requirements: 105-125V 50/60 cycles AC. 15 watts. Dimensions: 6%" W. a 9X°H. x V D.Kit IG-102 . .. 6 lbs $27.95
Heathkit Audio Generator Kit Switch -selected output frequencies, 10cps to 100 kc Less than .1 of 1% dis-tortion between 20 and 20,000 cps Out-
put level & frequency accurate to within±5% Meter is calibrated in volts & db Easy to build -easy to useSPECIFICATIONS -Fr 00000 cy: 10 cps to 100 kc, switchselected, 2 significant figures and multiplier. Output:6 ranges 0 to .003, .01, .03, .1, .3. 1 volts RMS into external600 ohm load or with internal load into HI -Z, 2 ranges 0 to 3,10 volts RMS into a minimum of 10,000 ohms, -60 db to +22db in 8 steps -60 dbm to f 2 dbm (0 dbm =1 mw into 600ohms). Distortion: less than .1%, 20 to 20,000 cps. Tubes:(1) 6AU6, (1) 6CL6, (1) 6X4. Power: 105-125 volts AC, 50 /60cycles, 40 watts. Dimensions: 9%" W. a 6)4" H. x 5 D.
Kit IG-72 . . . 8 lbs. $41.95
64(.11111.0rt FREE CATALOGSend for your Free COPY todaylFully describes over 250 excitingHeathkits at savings of 50% or morelChoose from the world's largestselection of quality Instruments Ineasy -to -assemble kit form!
HEATH COMPANY 24-4-1Benton Harbor, Mich. 49023
Please send free 1964 Heathkit Catalog.
Enclosed is S plus postage. Send
model(s)
Name
Address
City State Zip7E-123
49. Is the site located away fromthe main intersection?
50. Is the site easy to enter? Is thetraffic sufficient to require de-celeration lanes? Are they beingprovided? Is the street or high-way department cooperative inthis respect?
51. Two boundary roads providebetter access to the center. Isthis the case?
52. Is the shopping center trafficpattern simply planned as anintegrated circulatory system?
Parking
53. Is the ratio of parking area toselling area 3 -to -1 or more?
54. Has sufficient space (400 feet)been assigned to each car?
55. Is the parking space designedso that the shopper does notwalk more than 300 to 350 feetfrom the farthest spot to thestore?
56. What is the angle of parkingspace? (90 degrees providesthe best capacity and circula-tion.)
57. What is the planned or actualcar turnover? (3.3 cars perparking space per day is theaverage.)
58. Is the number of total spacesadequate for the planned busi-ness volume? (Too manyspaces make the center lookdead; too few openly invitecompetition around the center.)
59. Does the parking scheme dis-tribute the cars so as to favorno one area?
60. Is there an adequate number ofingress/egress roads in properrelationship with the arrange-ment of parking spaces?
61. For the larger centers, a ringroad is preferable. Is this thecase?
Size and Shape
62. Is the site large enough forthe type of center?
63. Is the size sufficiently dominantto forestall the construction ofsimilar shopping centers near-by?
64. Is the center of regular shape?If not, does the location of thebuildings minimize the disad-vantage of the site's shape?
65. Is the site sufficiently deep?(A depth of at least 400 feetis preferred; if less, the center
4
- - - for more details circle 35 on post card92 ELECTRONIC TECHNICIAN
Gas Stations do a$500,000,000 businessby promoting springtune-ups...
TV service dealers can do a multi -million dollar business bypromoting SPRING TV Tune-ups., It's logical. Damaged an-tennas, worn twinlead, aging TV sets can use a fresheningup after the Jong, hard winter. What better time than inthe spring for the TV service dealer to promote a "SpringTV Tune up" special. Blonder -Tongue gives you a com-plete, straightforward promotion that means extra salesin antennas, twinlead, and profitable TV signal amplifiers.It starts with a plan. Sales aids, window streamer, local admats and business producing postcard for use by TV servicedealers. 'Then comes the most complete product line in the
APRIL 1964
11
tune -opOamagedantennaBroken cry troihisgasN/Fuzzy AvitaAber cohr<,.A Put mew Stk?TV/Nett/re by reditmaged antewadd; abrickrTV
field; indoor and outdoor signal amplifiers-VHF, UHF andFM. For example, there's the new 2 -transistor mast mountedUHF amplifiers (Able -U2) that really brings in all UHF chan-nels. The lowest cost, full power two set TV signal amplifierfor indoor installation (B-42) and the well-known outdoortransistor models (Able -2 and Able -1).Add to this a bit of your own energy, and you can rack upextra"SpringTVTune-up"profits.Get details today from yourBlonder -Tongue distributor or, write, wire, phone
BLONDER-TONGUESa,r:audniganSit5i,vnwenacrko,Tryle,ssJoecrs,eyt0
10'L d 7, Toronto,2 Ont.
home tv accessories/closed circuit/community tv/uhf converters/Master tv
- - - for more details circle 19 on post card93
SAVEHUNDREDS OF DOLLARS
The Original Kit Organ
No longer is the luxury of own-ing a full size organ restricted tothose in the upper income brack-ets. Now you can have the prideof possessing an instrument ofsuperbly beautiful tone -one thatsounds like the glorious pipe or-gan -and meets the specificationsof the American Guild of Organ-ists. Hundreds of non -technicalpeople - housewives, doctors,business men, are building Arti-san Organs for their homes,churches or schools.BEFORE YOU BUY, COMPARE!
Be sure to get all the facts aboutkit organs before you buy anyorgan. Ordinary kit organs haveonly 12 master oscillators. Arti-san has an independent oscillatorfor each key of every keyboard.Most kit organs have only a fewtone filters, preamps and coup-lers. Artisan has 22 tone filters,22 preamps and 14 couplers onthe smallest two manual organ.Ordinary organs key the "audio",causing thumps and key clicks.Artisan keys the oscillators, pro-viding pipe -like attack and decayso essential to traditional pipeorgan tone. These are only a fewof the more than 50 unique fea-tures found in Artisan Kit Or-gans. Prices range from $1750 to$7500. You can pay as you buildand play as you build.
information about theworld's happiest hobbyORGANS kki2476 ET N. Lake , Altadena,Calif "
Please send me free information about building an Artisan Organ
Name
Address
City
State ZipRN
may look like a strip develop-ment.)
66. Is the site level? Is it on welldrained land?
67. Does the center face north and/or east?
68. Can the center be seen froma distance?
69. Are there structures, such as aservice station, located in theparking area? If so, do theyimpede the site's visibility?
70. Is the site a complete unit?(A road should not passthrough the site.)
71. Are the buildings set far enoughback on the site that the entirearea may be seen?
The Center's Design
72. Is the layout of the center astrip, L, U, or mall?
73. Is the architectural design com-pletely integrated?
74. Is the architectural style pleas-ing in appearance?
75. Will the design appeal to thetype of customers in the tradearea?
76. Does the design conform orharmonize with the styles ofresidential construction in thearea?
77. Is the signing harmonious andcontrolled? Is there adequatesigning to advertise the centeras a whole?
78. What is the quality of construc-tion?
79. Is there sufficient land areaavailable for future expansionwithout encroaching on theparking area?
80. Are the buildings designed ascontinuous frontage, withoutsetbacks? (If necessary, set-backs should be at the rear.)
81. Are the buildings designed ona modular basis of properwidth? (Preferred width, 35ft; depth, 100 to 150 ft.)
82. Does the design allow for flex-ible partitioning - to permitexpansion of 171/2 ft units to35 ft units?
83. Is there a basement storagearea?
84. Are the walkways covered withcanopies?
85. Is there a driveway for packagepick-up?
86. Have adequate landscapingplans been provided?
87. Are public restrooms and simi-lar amenities available?
88. If the center is of mall design,can all the stores be seen fromany one location?
89. Are all the stores readily acces-sible to each other, with nonehaving an advantage?
Table 2Points to Consider in Evaluating
An Isolated Site1. Fast traffic or congested areas
do no t produce drop -intraffic. Traffic averaging 35 to45 miles an hour is preferable.A feeder location would pro-duce more potential customersthan an arterial location con-sisting of fast, undelayed traffic.
2. A street where crossover ispossible increases the numberof directions from which a sitemay be approached. If thetraffic speed or congestion isnot great, a location on such astreet is preferred.
3. The quicker the customer rec-ognizes a site as that of a serv-ice or sales -service outlet, thebetter the chance of his stop-ping.
4. The site should be deep enoughto allow adequate parking forpeak customer use. If possible,a drive -around exit should beprovided to service the buildingand allow the customer ease ofexit.
5. An isolated site should be easyto enter and to leave. Ideally,the site should be free fromcurbs.
6. Parking space should be suffi-cient to allow ease of parking,turning around, and backingup.
7. Zoning regulations should per-mit the shop's sign to be seen.
8. A site along the traffic arterieswhere there is a high shoppingtrip frequency familiarizes thecustomer with the location andexistence of the store. Know-ledge of the retailer and hislocation is the first step towardthe consummation of a sale.
9. Do not locate where traffic iscongested as this affects theaccessibility of the site.
10. Avoid locations adjacent tovery fast, undelayed traffic.
11. Avoid areas which have a greatdeal of competition for cus-tomers from the same flow oftraffic.
- - - for more details circle 13 on post card94 ELECTRONIC TECHNICIAN
`,/14agic' Words FOR SUCCESS
Your courtesy and customer complaints can help build your business
No complaints? Maybe it's be-cause you don't have enough busi-ness! And maybe the reason youdon't have enough business is be-cause you've been "serving" yourcustomers with "half courtesy."Let's examine what this means.
Half Courtesy
Every electronic service shopowner knows that courtesy is animportant part of his business. Toofrequently only "half courtesy" isoffered, however, and it producesthe same results as a complete lackof courtesy. It is a habit we canslip into without realizing what hasoccurred.
"Half Courtesy" can be disaster-
point, are a number of "half cour-tesy" habits.
Talking too fast: It's easy to getinto this habit which is not onlyannoying to many people but hasa tendency to lead to misunder-standing.
Not paying attention: How oftenhave we glanced aside at somethingelse while a customer is saying wehave heard a thousand times orwhich bores us stiff? It's a naturalthing to do but it is still a "halfcourtesy" attitude.
Interrupting the customer: Thisone occurs most often when we arerushed or in a hurry and seek todeter a further "waste of time" ina conversation. Again it may be asmall thing to us but it has majorimportance to that customer.
Gesturing wildly: Ever noticehow annoying this is when practicedby a customer? "Thank heaven Inever do that," one will say, butwith the very next customer you'llstart doing the identical thing!
Crowding the customer: Manypeople, particularly women custom-ers, dislike the person who "crowds"them. Keep your distance withevery customer.
Juggling: There are a lot of thingswhich annoy customers. Jugglingmoney or polishing glasses are defin-itely in that category. The manwho, with hands in pocket, jugglescoins, or does so with two or threehe has in his hands during a conver-sation is practicing "half courtesy."
Failure to complete a service: Nocustomer will ever tell us about this"half courtesy" and we will seldomrealize that it is occurring unless wefrequently check our actions for it.Such things as allowing a customerto pick up something we shouldhave handed him or her, failureto completely package something,not holding a door open for thecustomer and overlooking a regularservice routine fall into thisgroup.
There are, of course, a greatmany other such "half courtesy"actions that decrease business pos-sibilities every day. Constant ex-amination of the things we do canhelp prevent them. Watching whatothers do also helps if the right ap-proach is taken.
Customer Complaints
Every technician receives hisshare of complaints; some to hisface, others to his employees andstill others that his customers maketo their friends and acquaintances.
It's natural that we want to min-imize them; there has developedthe idea that all is not well whencomplaints are being uttered bycustomers and a tinge of disgraceaccompanies their existence.
This is far from true. The shopowner who has no complaints isthe one doing the least business intown. Since no two customers arealike, it is almost impossible todevelop a business system that willsatisfy everyone and even the bestsystem will show occasional weakspots. Customer complaints are thesurest method we have of finding
these loopholes in our businessstructure.
Complaints should never be hid-den. They should never be ignored.Most certainly the shop ownershould never resent them.
That's the advice given us by anumber of successful shop ownerswith whom we have talked on thesubject. All were emphatic in de-claring that a complaint is our bestopportunity to build customerfriendship.
The shop owner who handlesevery complaint, no matter howtrivial, with the maximum amountof sincerity and consideration, putsit to practical use in building abetter business for himself. And,wise is he who profusely thanksevery customer for his kindness andconsideration in passing on the in-formation. That is proof to thecustomer that we value his businessand will do our utmost to satisfyhim. Being resentful or obviouslyignoring complaints (which in mostcases are really suggestions) auto-matically tells that customer wecare little for his business.
Most business today is on trust.The average customer seldom spec-ifies in detail every purchase hemakes; usually he orders service ingeneral terms and leaves it to theshop owner to treat him fairly.Naturally he is going to be moston his guard when making firsttransactions; will be much more aptto criticize and complain about thekind of business he is patronizing.
"No businessman can ever reallysee the customers' side of theirrelationship," an executive told ussome time ago, "because he is soengrossed in his side of it. Yet to besuccessful, he must know what hiscustomers are thinking, how theyreact to his ways of doing business,what they think of the merchandisehe has to sell. If he doesn't . . . well,then eventually he is lost."
APRIL 1964 95
New! BUSS SPACE SAVERPANEL MOUNTED FUSEHOLDER
Actual Size
Holder Extends only 29/32 inchbehind front of panel.
Fuseholder tak 1/4 inch fuse. Converts to9/32 X 114 inch fuse simply by changing screw type knob.Holder is rated at 30 ampere for any voltage up to 250. Holder can be made drip -proof or water -proof from front of panel or completely water -proof. Holder meets the need for a highly reliable military
to minirn 'mensions for commer-plicati
Cosi1114 Write for BUSSBulletin SFH-10
n Co.. St. Louis 7, Mo.
and Bud Weston, Commissioner Lee's engineeringassistant, were also present. TAME plans carryingits fight to Congress and is arranging to appear beforethe committees headed by Sen. Magnuson (D -Wash.)and Rep. Rogers (D -Tex.).
Urges LicensingNATESA executive director, Frank J. Moch, has
urged state licensing for all TV -radio service dealersand technicians in Illinois, following a crackdown onone alleged 'gypping' service firm in Chicago by IllinoisAttorney General William G. Clark. Moch said thatlicensing of the repair business "is the only sure cureand the only protection for the people and ethicalbusinesses." The NATESA has tried four times toget a licensing law passed in the Illinois GeneralAssembly but has been defeated each time.
New OfficeOjibway Press, Inc., business paper publishers and
parent company of ELECTRONIC TECHNICIAN magazine,opens an office in San Francisco. Stearns R. Ellis ismanager of all 26 Ojibway publications at the office.
Ups Color CRT OutputRCA announces that it will increase its produc-
tion of color TV CRTs this year by more than 50percent over 1963, but that it will have to continueallocating the supply to set manufacturers becauseoutput will still fall short of demand.
BUSS: 1914-1964, Fifty years of Pioneering...NEWS OF THE INDUSTRY
Profits RiseThe Radio Corp. of America expects 1964 to be
its third consecutive year of record earnings, ArthurL. Malcamey, RCA Group Executive Vice President,told the Cleveland Society of Security Analysts re-cently. Citing RCA's "rising curve of profitability overthe past 18 months," Malcarney told the analysts thatthe company's 1963 operating earnings were up about25 percent over those of 1962, on sales that increasedby 2 percent. Subject to final audit, RCA's 1963sales were about $1,780,000,000 and its operatingprofits were about $65,000,000.
TAME Meets With FCCA delegation from TAME, Television Accessory
Manufacturers Institute, met with members of the FCCin Washington for an informal exchange of ideasconcerning the problems of CATV. RepresentingTAME were John Winegard and Robert Fleming,Winegard Co.; Morris L. Finney, Jr., Finney Co.;Sam Schlussel, Channel Master Corp. and Mort Leslie,JFD Electronics Corp., TAME's Acting Chairman.Present for the FCC were Commissioners Robert E.Lee and Kenneth Cox. A number of department heads
Every Application ..
Single pole, multiplepole, small base, full base,molded base, bakelite base,porcelain base for fusefrom 14 x % inches up to% x 2 inches. Also signalfuse blocks and specialblocks of all types.
Send us your require-ments-we have the blocyou need or can engin
96- - - for more details circle 20 on post card
ELECTRONIC TECHNICIAN
Save Assembly Time withQuick -Connect Terminals on
BUSS Fuseholders
Eliminates soldering. Permits
use of pre -assembled harness.
Reduces assembly time.
Sanaa Hi,,,HIC, and-
Write for BUSSBulletin SFB.
n Co., St. Louis 7, Mo
Tongue Laboratories, Inc. Balash said that UHF offersthe greatest profit potential to TV -radio dealers sincethe advent of TV. The sale of UHF converters andantennas alone during the period of changeover willcreate a 500 -million dollar market, he estimated.
New Sales RecordThe Radio Corp. of America announces that it
established new all-time records in 1963 with salesof $1,789,277,000 and after-tax profits of $66,033,000.Earnings per common share for the year v. ere $3.61,compared with per-share operating profits of $2.84in 1962, the previous record year.
Chairman of the board, General David Sarnoffindicated that color TV became the most vigorousgrowth element in the consumer market and accountedfor a major share of earnings from the company'sconsumer products. "No other investment in thecompany's history has more richly fulfilled our expecta-tions, and we believe color's greatest period of earningsis ahead," General Sarnoff said.
JFD SuesJFD Electronics Corp as plaintiff filed a complaint
on January 28, 1964, against Channel Master Corpas defendant in the U. S. District Court for the South-ern District of New York. The complaint charges thatthreats made by Channel Master with respect to theLog -Periodic antennas make it necessary for plaintiffto seek relief and have its rights declared.
... New Developments in Electrical ProtectionHoover Returns to EIA
William F. E. Long, director of the ElectronicIndustries Association's Marketing Services, announcesthat John S. Hoover has returned to the EIA's Market-ing Services Department as manager of special projectsand publications after serving one year as deputy exec-utive director of the National Council of ArchitecturalRegistration Boards.
Publisher ExpandsSupreme Publications is planning to enlarge its
Chicago warehouse and incorporate required officefunctions there. Editorial work will continue to beperformed at Highland Park, Ill.
Retail Ad ProgramThe high fidelity products division of North
American Philips Co., Inc., is unveiling a retail dealeradvertising program for its line of Norelco tape re-corders and accessories. Details of the dealer adver-tising program were outlined at a series of coast -to -coast meetings held by W. Semmelink, product man-ager, and J. Gerrity, sales manager, of the company'sHi Fi products division.
Predicts UHF GrowthBy 1970 the number of U. S. homes being served
by UHF television will be greater than those servedby VHF, the annual conference of the National Ap-pliance & Radio -TV Dealers Association was told byJerry Balash, manager of home products for Blonder -
r normal acting loses foreetion where circuit is not subject to
starting currents or surges.
Write for BUSSBulletin SFB.
APRIL 1964- - - for more details circle 20 on post card
97
ADVERTISERS INDEX
American Telephone & Telepragh Co. 83Arco Electronics, Inc. 25Arrow Fastener Company, Inc. 98Artisan Organs 94
B & K Manufacturing Company 63B & K Manufacturing Company 65B & K Manufacturing Company 74B & K Manufacturing Company 90Belden Manufacturing Company 2nd CoverBlonder -Tongue 93Bussmann Manufacturing Division 96-97
Castle TV Tuner Service, Inc. 30Channel Master Corporation 33Chemtronics, Inc. 32
Clarostat Manufacturing Company 87Cleveland Institute of Electronics 68Conar Instruments 84
Delco Radio Division 91Dymo Industries, Inc. 32
EICO Electronic Instrument Co., Inc. 40
Finney Company 86
Gavin Instruments, Inc. 28GC Electronics Company 73General Electric Company 26-27Greyhound Corporation 81
Hallmark Instruments 78Heath Company 92
PRECISION TUNER SERVICEP. 0. BOX 272 1200 S. WALNUT ST.BLOOMINGTON, IND. EDISON 99653
7.50V or U
COMBO PLUS9.95 POSTAGE
6 MONTH WARRANTEEr -r,
4 J 11!
0064
All Types T.V. Tuners Cleaned, Repaired and Aligned to Factory Specifications. Same day in shopservice on most Tuners. Price Includes Minor Parts, Major Parts at Cost Price. We use Original
Parts if possible. State Make Model and Enclose all Parts and Tubes. Pack Well and Insure.
ALSO HAVE LARGE STOCK OF EXCHANGE TUNERS, WRITE FOR TYPES AND PRICES.
- - - for more details circle 45 on post cord
Injectorall Company 28International Rectifier Corp. 35
Jackson Electrical Instrument Co. 72
Lafayette Radio Electronics Corp. 69
P. R. Mallory & Co., Inc. 71Motorola Training Institute 98
Newcomb Audio Products Co. 72
Philco Corporation 77Precision Apparatus, Inc. 70Precision Tuner Service 98
Quam-Nichols Company 84Quietrole Company 78
Radio Corporation of AmericaRCA Electronic Components & Devices
85, 89, 4th CoverRCA Parts and Accessories 79, 82RCA Sales Corporation 36
Raytheon Company 75John F. Rider Publisher, Inc. 88Rohn Manufacturing Company 76
Sarkes Tarzian, Inc., Semiconductor Div. 61Sarkes Tarzian, Inc., Tuner Service Div. 20Seco Electronics, Inc. 34Sencore, Inc. 29Sencore, Inc. 31Sprague Products Company 23Sylvania Electronic Products, Inc. 67
Ungar Electric Tools 22University Loudspeakers 19
Weller Electric Corp. 24Winegard Company 39Winegard Company 80
e 4 I
ARE YOU CASHING -IN
ON THE PROFITABLE
2 -WAY RADIO SERVICE BUSINESS ?
* Motorola will train you for this rewarding, elite profession
* Send for our FREE EVALUATION EXAM. Prove to yourself thatyou are ready to learn FM 2 -way radio servicing.
Opportunities in 2 -way radio servicing are virtually unlimited. Just one of the hundreds of successful Motorola ServiceStations writes, "we would be pleased to interview any graduateof your school that has received some training in 2 -way radiomaintenance. We are an established firm, 10 years old, witha promise of expansion governed by our ability to obtain com-petent technicians." Get all the facts today. There is noobligation and no salesman will call.
IMMOTOROLA TRAINING INSTITUTE4545 West Augusta Blvd. Chicago 51, Illinois Dept. AEH415
Send me FREE entrance exam. Send full details on Home Study Course on FM 2 -way Radio
ServicingSend me details on how you can help me prepare for an FCCLicense.
Name Occupation__
Address
City Zone State.1
- - - for more details circle 41 on post card
R ORM ICE MI Staple Gun TackersSAVE YOU TIME AND MONEY!
Tapered striking edge gets into tight corners!
MODEL T-18 - For wires 3/16" andless in diameter. Loads (85) T-18staples with 3/16" crown, divergent -pointed, of .050 wire in 3/8" leglength.
MODEL T-25 - For wires up to 1/4"in diameter. Loads (85) T-25 stapleswith 1/4" crown, wedge or divergent -pointed, of .050 wire in 9/32", 3/8",7/16" and 9/16" leg lengths.
Write for catalogand information.
SAFE!Can't damage wire be-cause staples automati-cally stop at right height!Won't even break 1/4"hollow glass tubing.
FAST!Proved by test 10 timesfaster than old hammermethod. Saves you 70%in fatigue and efficiency. . . saves many dollars.
HOLDS!New staples get tremen-dous holding power fromtack points that spreadto lock into wood!
All -steel constructionwith chrome finish.
Jam -proof patentedmechanism for trou-ble -free operation.
) ARROW FrisrEniza COACO/i/V Y. PVC.
One Junius Street Brooklyn 12, N. Y.
- - - for more details circle 12 on post card98 ELECTRONIC TECHNICIAN
Here's why thenew RCA Pict -O -Guide
is so effective:Pictures tell thestory best.Many, many full -color photos showtrcuble symptoms just as they ap-pear on a color screen to help youlocate troubles quickly.
Expanded trouble-shooting section.Gives you the advantage of RCA'smany years of accumulated experi-en :e in locating, diagnosing andcorrecting service problems in colorreceivers.
Takes a new lookat setup procedures.Setup procedures have been vastlysimplified. Color photos show howeach setup job is done and what theresults look like on the screen.
Helps you learnby doing.Designed to give you practical ex-perience...to let you follow everystep of every service procedure.
And it's Free withyour purchase of
RCA entertainmentreceiving tubes!
'JOIN nibCOLOR
PARADE'
Also free with the purchase of RCA entertainment receiving tubes...BULOVA WRIST WATCHES
1A1439 17 level Men's Model BULOVA yellow, 10Krolled gold plate, stainless steel back, unbreakable mainspring, shock resistant, good looking strap. Handsome
.prestige men's time piece.
1A1440- 17 Jewel _allies' Model BULOVA Yellow, 10Krolled gold plate, s-ainless steel back, unbreakable mainspring, shock resistant, attractive cord. Beautiful pres-tige ladies' time piece.
CARAVELLE' WRIST WATCHES (Made by a Division of the Bulova Watch Co., Inc.'
1A1435 17 Jewel Men's Model Caravelle-Handsome 10micron yellow gold finish case with stainless steel back.Waterproof* with unbreakable main spring, luminoushands and dial. Shock resistant; sweep second hand.
1A1436-17 Jewel Ladies' Model Caravelle-Grateful 10micron yellow gold finish case with stainless stee back.Shock resistant with unbreakable main spring. Elf gantlfstyled.
*Waterproof as long as case, crystal and crown remain intact
For details on how to get the new RCA Color TV Troubleshooting PICT -0 -GUIDE and BULOVA or CARAVELLEw wristwatches, see your participating Authorized RCA Tube Distributor right away.
RCA ELECTRONIC COMPONENTS AND DEVICES, HARRISON, N.J.
The Most Trusted Name in Electronics
BASIC ULTRASONICSby C. rus GI:cksteinA cl -.ar, definitive "pictured text" which dis-cusS-n the ultrasc,nic process used in electro-plat.mg, textile bleaching, dyeing. homogeniza-tion al d other industrial aoplications. Coversthe ..pplication ultrasound to solids, fluxlesssold -ring of m;tals. ,veiding odd -shaped holesand drill -J sIcts i- meta's, gla, , and ceramics.Inch d .5 cornp'etp coverage. or theory, equip-ment anc-: appiic.= Jr-i;. pies, illusf-ited,paper -- $3.50, cloth - $4.60.
BASIC MATHEMATIPSby Norman H. CrowhurThis well Known R:d ''picture -text" makeslearning mathemati,s .aster and easier thanever before' It utilizes ine "utility of mathe-matics" approac!- a,. :features at least one clearillustration on each page to reinforce learning.The complete foul -volume course takes you ineasy stages from simple arithmetic throughalgebra, geometry, trigonometry, and on .to cal-culus. 4 volume set, 567 pages, illustrated, paper- $13.75, cloth - $14.50.
EA.:1C AUDIONorman H. Crowhurst
This fully illustrated course gives you a com-plete understanding of basic audio theory. Thethree volumes cover such vital topics as corn-ponents, circuit values, distortion effects, phase -splitting circuits, feedback applications, shield-ing, audio transmission lines and much, muchmore. The material is written in clear, easy -to -understand form and covers every area of theaudio field. 3 volumes, 368 pages, illustrated,paper - $8.70, cloth - $9.95.
BASIC TRANSISTORSby Alexander SchureA comprehensive basic discussion on transis-tors, featuring many schematics, photo -dia-grams, line drawings and cartoon illustrations.Covers transistor biasing, characteristics, con-ventional and power transistors, amplifiers,oscillators, and tetrode units. Each chapterconcludes with review questions. 152 pages,illustrated, paper - $3.95, cloth - $5.50.
BASIC RADIOby Marvin TepperHere is the finest instructive material ever pub-lished on radio communications. This 6 -volume"pictured text" contains more than 750 care-fully prepared illustrations that make each ideacompletely understandable. The'volumes coverDC electricity, AC electricity, electron tube cir-cuits, AM and FM receivers, transistors andtransmitters. 6 volumes, 756 pages, illustrated,paper -$13.85, cloth - $14.85.
FILL IN TEAR OUTMAIL TODAY
ENCYCLOPEDIA ON CATHODE RAY
OSCILLOSCOPES AND THEIR USESby John F. Rider and Seymour D. UslanEvery practical research application where oscil-loscopes can be used is covered in this monu-mental volume. Contains detailed material onmaintenance, technical specifications, complexand square wave forms and a long list of othertopics. More than 4500 illustrations are in-cluded, with up-to-the-minute material on manynew types of oscilloscopes. 1356 pages, illus-trated, cloth - $27.00.
SERVICING TV AFC SYSTEMSby John RussellDiscusses the trouble, location and repair ofthe major and minor type of TV AFC circuits inuse today. You'll find crystal-clear informationon theory, wave -forms, circuits, components,common faults and their diagnosis together withover 75 illustrations - to make the materialcompletely understandable. 128 pages, illus-trated, paper - $2.70.
TV TROUBLESHOOTING AND REPAIRby Robert G. MiddletonNewly revised and updated, this book reflectsthe rapid changes in TV technology. It coversnew circuits, new tubes and the transistor,giving the latest troubleshooting methods andtechniques. Covers visual -alignment, sweeptroubles, video amplifier circuits, external in-terference, high voltage power supplies andmuch more. 216 pages, illustrated, paper -$3.95.
CITIZENS BAND RADIOby Allan LytelDescribes the historical development, applica-tions, classification and various types of CBequipment available. Coverage includes designfeatures of different transmitting and receivingequipment, installation, repair, power supplies,antennas, single and multiple -channel units.FCC rules and regulations for CB users are alsoincluded. 160 pages, paper - $3.90.
REPAIRING TRANSISTOR RADIOSby Sol LibesPresents methods and procedures especiallydeveloped for the repair of transistor radios.Includes basic transistor theory transistorizedcircuitry, design and superheterodyne radio re-ceiver principles as applied to transistor radios.Servicing sections cover step-by-step proce-dures, trouble check points, charts, test equip-ment and tools for repairing transistor radios.159 pages, illustrated, paper - $3.50.
MARINE RADIOTELEPHONE PERMIT
Q & A MANUAL - Third Class Operatorby Milton KaufmanPrepares you with all the questions likely to beasked in the FCC examination for the third class
10 -DAY Free Book ApprovalGentlemen: NO POSTAGE NEEDEDPlease send me the following books for free examination. At the end of 10 days,I will either remit payment plus postage, or return the books without furtherobligation.
1
2
3
Name(Please print)
Address
$
$
City State Zip Code
El Check here and save. Enclose payment with order and the publisher pays postage.Same return privilege guaranteed. 627
radiotelephone permit; along with the answersand complete explanations. Categories includebasic law, operating practice and types of radiotelephones. The book also provides a list ofFCC field offices. 48 pages, illustrated, paper -$1.35.
BASIC TELEVISIONby Alexander SchurePresents the basic theory, operation and cir-cuitry of black and white television in a clear,thorough and accurate 5 -volume "picture book"course. Individual volumes completely cover thetransmitter, organization of the TV receiver andreceiver circuit explanations. The text is sup-ported by more than 500 informative illustra-tions that help you to visualize each individualconcept. 5 volumes, 664 pages, illustrated,paper - $11.25, cloth - $12.75.
HOW TO TROUBLESHOOT TV
SYNC CIRCUITSby Ira RemerA practical, valuable book which covers themany variations in monochrome and color tel-evision sync circuits and possible troubles thatmight occur in them. Discusses fundamentalsof sync circuits, takeoff, clipping, limiting,noise cancellation and time consultants. Thesection on output circuits includes integrationand horizontal circuit signals. 128 pages, illus-trated, paper - $2.90.
HOW TO USE GRID -DIP OSCILLATORSby Rufus P. TurnerDeals with the construction and use of this ver-satile instrument as well as its application toall kinds of radio and television receivers. Chap-ters include: Principles and Circuits; Grid -DipAdaptors; Resonant Circuit Measurement; Ca-pacitance Measurements; Inductance Transmit-ter Applications; Antenna and Transmission -Line Tests; Applications; Commercial Grid -DipOscillators. 112 pages, illustrated, paper -$2.50.
BASICS OF FRACTIONAL HORSEPOWER
MOTORS AND REPAIRby Gerald SchweitzerThis book provides a working explanation offractional horsepower motors and presents pro-cedures for repairing and maintaining them.It fully explains the operation, troubleshootingtechniques, and testing of electrical induction,split phase, capacitor, repulsion, shaded:pole,universal and three-phase motors. Each motoris accompanied by a troubleshooting chart.176 pages, illustrated, paper - $3.90, cloth -$4.90.
HOW TO SERVICE TAPE RECORDERSby C. A. TuthillGives you complete information on tape re-corder repairs. Contains lucid discussion on thebasic principles of magnetic recording, taperecording, mechanisms, circuitry and trouble-shooting procedures. Explains the tape recorderand its operations with many fine illustrations.160 pages, illustrated, paper - $2.90.
HOW TO LOCATE AND ELIMINATE RADIO
AND TV INTERFERENCEby Fred D. RoweThis completely revised and up-to-date bookcontains the latest techniques for locating andeliminating radio and TV interference. The latestelectronic components are discussed at length,and their applications analyzed. Extremely prac-tical in its approach, this book tells you whatto look for, what to do and how to do it. 168pages, illustrated, paper - $2.90.
HOW TO INSTALL AND REPAIR MARINE
ELECTRONIC EQUIPMENTby Elbert RobbersonProvides you with a working knowledge of theunique circuitry and practices found in smallboat equipment. Contains complete informationon radio telephones, antennas, grounds, radiodirection finders, echo sounders, automaticpilots, loran and many other considerations. Avital book for anyone considering this growing,lucrative field. 206 pages, illustrated, paper -$4.50, cloth - $5.95.
ranilh RIDER
BOOKS...BASIC RADIO REPAIR
by Marvin TepperA sensible, up-to-date approach to servicing both re-ceivers and transmitters. Beginning with clear discussionof more than 20 test instruments, the book then proceedsto clarify the significant aspects of various components.A general presentation of servicing procedures is fol-lowed by the practical techniques for repairing super-heteroayne, portable, automobile and FM receivers.Transistor receivers are treated in four full chapters.Later sections deal with the long neglected area of trans-mitter servicing. 212 pages, illustrated, paper
(2 vol. set) - $5.30,cloth - $5.95.
PULSE GENERATORS IN
INDUSTRIAL ELECTRONICSEdited by Sheldon Littwin
Pulse generators and wave shaping circuits utilizingtransistor, diode and vacuum -tube design receive com-prehensive discussion in this brand new book. Theoryand design data, presented on an industrial level, care-fully develops full comprehension of these circuits.
144 pages, illustrated, paper - $3.50
OSCILLOSCOPE HANDBOOKby Rufus Turner
This brand new, two -volume handbook, introduces theoscilloscope and explains its applications - withoutusing technical jargon - for technicians, radio opera-tors, servicemen and hobbyists.The first volume covers operation principles, structureand characteristics of the instrument. In addition, step-by-step instructions explain general tests and measure-ments in current, frequency, phase and specializedapplications, such as receiver and transmitter testing.Vol. II clearly explains specific tests and measurements.The book avoids theory wherever possible and usessimple diagrams instead of detailed circuits.
240 pages, illustrated, paper - $5.90, cloth - $6.95
WHEN READING FOR PROFIT
Choose from this outstanding library of RIDER books. . . expertly edited by top authorities in the elec-tronics field. There are hard cover volumes andpaperbacks for every need - to brush up on basicfundamentals to increasing your knowledge in someof the most difficult problems in the business. Thesebooks are attractive, sturdy and designed for every-day reference. ORDER YOUR COPIES TODAY.
now available from
ELECTRONICTECHNICI4GN )
IT'S EA6Y TO USEELECTRONIC TEST EQUIP:',"tN r
by Larry Klein and Ken Gilmore
Various techniques for using electrical and electronictest instruments are completely explained 'n 'his up-to-date book. An extremely wide range of test instrumentsare covered, from very simple VOM to the distortionanalyzer and oscilloscope.More than 100 illustrations provide a full grasp of thetest instruments and their various applications.
192 pages, illustrated, paper - $4.00.
MATHEMATICS FOR ELECTRONICSAND ELECTRICITY
by National Radio Institute StaffBeginning with a complete review of arithmetic, the bookprogresses through algebra, trigonometry, Boolean Alge-bra, and the binary number system. It relates every topicto its electronics applications such as finding resistortolerance with percentages, and solving complex vec-tor problems with trigonometry.
There are several other valuable sections which helpyou to save time in setting up equations, simplifying a -cand d -c circuit calculations, constructing and applyingmany types of widely used graphs, etc. Example prob-lems throughout are worked out in detail.
256 pages, illustrated, paper - $3.95, cloth - $5.60.
TRANSISTOR TELEVISION RECEIVERSby T. D. Tower
This comprehensive work thoroughly explains the fea-tures of modern transistor television receivers and howthey differ from conventional tube sets. It presents, inlogical order, a complete analysis of each phase of tran-sistor television such as the video amplifier, sound sec-tion, sync separator circuits, the picture tube andassociated circuits.Each chapter begins with an introduction to a particularphase and progresses through its whole range of specifi-cations. 194 pages, illustrated, cloth - $6.95.
FREE
EXAMINATION!
SEND
NO MONEY...
with your purchaseof RCA EntertainmentReceiving Tubes
Ask your participating RCADistributor for details
Color TV is now a major factor in theU.S. economy. And 1964 will see more color -set salesmore color programming ...and more need for color servicing ...thanever before.
Are you prepared to take advantage of the swing to color? Here'sthe book that will help to put you and keep you in the highly profitablecolor -TV servicing business...
The Brand -New RCA Color -TV Trouble-shooting Pict -O -Guide 1A1389 Produced un-der the guidance of John R. Meagher, RCA's famous color -TV servicingexpert, the new PICT -O -GUIDE .s your quick and easy, all -in -one aidto proper troubleshooting and adjusting of color TV receivers.
