Collins 476J–1 Selective Wideband Voltmeter Manual - 520 5199 00 - March 1959
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Transcript of Collins 476J–1 Selective Wideband Voltmeter Manual - 520 5199 00 - March 1959
INIT o
5 E T V AND
WIDEBAND VOLTM T R 47 6J·l
520 5199 00 2 MARC 1959 59-14
©CO LI 5 RADIO COMPANY EDAR RAPID, IOWA, U.S.A. 1959 Texas Division
=============== PRINTED IN THE UNITED STATES Of AMERICA =========
TABLE OF CONTENTS
SECTION PAGE
GENERAL DESCRIPTION 1
1.1 General 1 1.2 Equipment Description. 1 1.3 Unit Characteristics 1 1. 3. 1 Physical Characteristics 1 1. 3. 2 Operating Characteristics 1 1. 3. 3 Electrical Characteristics 1
II INSTAllATION 2
2.1 General 2
\ 2.2 Unpacking the Equipment 2 2.3 Installation 2 2.4 Initial Adjustments. 5
52.4.1 Primary Power . 2.4.2 . Adjustments 5
III 5OPERATION
3.1 General 5 3.2 Controls 5 3.3 Calibration 5
. i
_-=:.=~""_
VI
Table of Contents List of Illustrations
SECTION
III (Cont'd.)
3.4 VTVlVI Measurements (Wideband) 6
3.4.1 RM8 Levels 6
3.4.2 Voltage Ratios . 6
3.5 Selective Voltmeter Measurements 7
3.5 1 Harmonic Distortion Measurement 7
3.5.2 Intermodulation Measurements 8 3.5.3 Crosstalk Measurement 8
3.5.4 Attenuation lVIeasurements 9
3.5.5 Modulation Characteristics Test 9
TABLE 0 CO TE TS (CO NT.)
PAGE
IV PRINCIPLES OF OPERATION 10
4.1 General 10
4.2 Circuit Description 10
4.2.1 Input and Amplification 10 4.2.~ 800 KC I-F Circuit with Filtering 10 4.2.3 15 KC I-F Circuit with Filtering 10 4.2.4 Output Circuit 11
V MAINTENANCE 11
5.1 General 11
5.2 Recommended Test EqUipment 11
5.3 Bench Test and Alignment 11
5.3.1 Wideband Voltmeter (vtvm) Calibration 11
5.3.2 Selective Voltmeter Calibration 11
5.3.3 50 KC Oscillator Level Calibratiot1 12
5.3.4 Output and Mete,-' Alignment 12 5.3.5 Normal Calibration 12
5.4 Troubleshooting 12
PARTS LIST 15
FIGURE
LIST OF ILLUSTRATIO 5
PAGE
1-1 Selective and Wideband·Voltmeter 476J-l iv
1-2 Carrying Case for Selective and Wideband Voltmeter 476J-l iv
3-1 Selective and Wideband Voltmeter 476J-l Harmonic Distortion Measurements 7
3-2 Selective and Widebancl Voltmeter 476J-1, Intermodulation Measurements 8
ii
Table of Contents List of Illustrations
LIST OF ILLUSTRATIONS (CONT.)
FIGURE PAGE
3-3
5-1
5-2
Selective and Wideband Voltmeter 476J-l, Near-end and Far-end Crosstalk Measurements
Selective and Wideband Voltmeter 476J-1, Calibration Equipment Assembly
Selective and Wideband Voltmeter 476J-l, Schematic Diagram
9
11
13
LIST OF TABLES
TABLE PAGE
Average D-C Operating Voltages 12
iii
WØCCW
Section I General Description
CI32 FUNCTION SELECTOR SI05
RI09 M 101
SIOI RI50
RI80
EIOI
838 877 Pb
SI02 5103 .1101 SI06 SI04
Figure 1-1. Selective and Wideband Voltmeter 476J-1.
838 876 Pb
Figure 1-2. Carrying Case for Selective and Wideband Voltmeter 476J-l.
iv
Section I
General Description
SECTIO I GEN RAL DESC TION
1.1 GENERAL
Selective and Wideband Voltmeter 476J-1 is a highly sensitive, selective test instrument which measures the voltage level of each frequency component of complex wave forms in the 4 to 750 kc range. As a selective voltmeter it is used either in the laboratory or in the field for several types of measurements: (1) harmonic distortion, (2) intermoduiation products, (3) crosstalk, (4) attenuation, and (5) modulation characteristics tests, relative to electrical filters, cables, or open-wire lines. The frequencies of a complex wave form are also indicated. As a wideband electronic voltmeter the 476J-1 measures the rms volt.1.ge level of a single or composite signal or noise in the 200 cps to 750 kc range.
1.2 EQUIPMENT DESCRIPTION
The 476J-l consists of four major circuits: (1) an r-f amplifier with an input matching network and a low pass filter, (2) an 800 kc i-f circuit, (3) a 15 kc i-f circuit, and (4) a metered output circuit. See figure 1-3.
The 476J-l is a single unit which can be either rackmounted on standard 19-inch racks or llsed on a bench. It is fitted with removable safety covers and two carrying handles. A reinforced wooden carrying case is available for transporting the unit. See figure 1- 2.
Standal'd construction techniques are used on internal wiring with small parts accessible on composition terminal boards. Critical circuits are enclos ed in metal containers which have removable covers. Tubes are held in place by spring loaded holders. The tuning condensor is ruggedized, vernier-driven, and directly calibrated with the tuning dial. The dial is illuminated with two 6.3 volt'pilot lamps.
1.3 UN T CHA ACTERISTICS
1. 3.1 PHYSICAL CHARACTERISTICS
Weight (unit only) 59 pounds
Weight (encased) 78 pounds
Size Width
19 inches Height
10 1/2 inches Depth
12 inches Forward Projection (when rack mounted)
2 1/4 inches Mounting
Rack mounted or portable Finish
Chrome plate and tin plate chassis Grey panel
Ventilation Convection
1. 3. 2 OPERATING CHARACTERISTICS
Ambient Temperature -100 C(14o F) to 50 0 C(122 0 y)
Ambient Relative Humidity o to 90 percent
Ambient Altitude 15,000 feet
Operating Duty Cycle Intermittent, attended
1. 3. 3 ELECTRICAL CHARACTERISTICS
Voltage Requirements 110 volts a-c, 42-60 cps to 280 volts a-c, 42-60 cps, 50 volt-amperes (variable)
Input Impedance Balanced
75-150-GOO-2K ohms, minimum return loss 20 db. .30 db minimum balanced attenuation. Up to 500 volt d-c blocking. Approximately 50 uuf shunt input capaci
tance Unbalanced
75-150-600-20K ohms: minimum return loss 20 db. Up to 500 volt d-c blocking
1
Section I - II General Description - Installation
Input Potentiometer 5K ohm (non-inductive) for fun dynamic range use
Measurement Characteristics Wide-Band Voltmeter
Voltage 10 to 100 millivolts; 1 to 10 volts
Frequency 200 cps to 750 kc
Accuracy 5 percent (full scale deflection)
Selective Voltmeter Voltage
10 microvolts to 10 volts (-100 db* to +20 db)
Frequency 4 kc to 750 kc (continuous)
Accuracy 10 percent (Full scale deflection)
Selectivity Less than 4 db attenuation at f ±100 cycles: More than 75 db attenuation at f ±600 cycles
Spurious Frequency Attenuation More than 70 db relative to the highest frequencies considered
Band-pass 200 cps
Image Frequency Attenuation More than 90 db in operating b8.nd: Approximately 30 db from 800 kc to 2.3 mc
Error for ±10 Percent Primary Voltage Variation
Less than O. 1 db as wideband level meter: Less than 0.5 db as a selective voltmeter
Background f\oise Approximately 1 microvolt
Calibration Sensitivity and Frequency calibrated by means of an internal crystal-controlled :50 kc oscillator
Protective Devices \
Replaceable fuses 250V, .375A B+ 250V, 2A a-c line
Meter 1 milliampere movement, calibrated in volts and db
Accessories Line power corel; headphones
*0 db equal to 0.775 volts across any impedance load
SECTION II INSTALLATI,ON
2.1 GENERAL
Section II outlines the procedures for unpacking and installing the equipment, applying primary power, and ins truction s pertaining to initial adj ustments and calibration.
2.2 UNPACKING THE EQUIPMENT
Unpack the equipment carefully. Inspect each component for physical damage. Check the mechanical operations of the switches and tuning controls. If any defects are found, refer to the inside front cover
2
of this publication for provisional guarantees and shipping instructions. Place the spare parts kit
J
either in the carrying case cover cabinet or a suit able parts storage location.
2.3 INSTALl.ATlON
Remove the protective covers by loosening the knurled screws. Remove all sh ipping documents and packing material from the instrument. Secure 8.11 tubes in the sockets. Check the pilot lamps on each side of the dial assembiy. Replace the covers. Check fuses on rear of unit and replace blown or missing fuses.
R MOD 2
OSCILLATOR i
FIL TER
o
5102
o 6
51058
6
6
SELECTIVE VOLTMETER
AMPLIFIER
R MOD I
LOW PASS
e
5101
"INPUT IMPEDA'NCEe I I'_NPUT I
BALANCE UNBALANCE
x db X db75
10 o+20~ ~I6~:~~ ::: 100 +40---0 0----<>.1 -20 VARIABLE FREQUENCY
150 0 ~ o----j(----:--- 20 K OSCILLATOR
CAL 2---01 6 o-----<J.OI -4075----01 Y' 9~0-5K o 5101 SI02
e. 50 KC5105A -j ~
IFREQ RANGE I ISELECTIVE VOLTMETER RANGE I FUNCTION SELECTOR 5103•
mv MAIN TUNING
db mv db
-20 100 -- -30 VTVM~ ~CALI
150-300~ ~300-450 -10 -40300~
~30 ~IO I~IA~I60-150 ---u 0--400-600 SEL VM--o cr-- CAL 2 CAL0 1000--0 -50
O~J4 -60 --01 (() 6 0--600-750 CAL 2--01 80-- I -60 PHONES -<> I CRYSTAL." o 6 ~50 KC
5103 5104 5105
'.
Section I-II General Description -Installation
5102
SELECTIVE VOL TMETER
AMPLI FIER
R MOD I
R MOD 2 51058 5105A
o 6
o
1058 OSCILLATOR
""'k ~ J¢n _.
VTVM
AMPLIFIER
ICAL 21
15 KC
6
INT 0 GAIN
IPHONESI
-
INT CAL~
~
50 KC
VARIABLE FREQUENCY
OSCILLATOR
6
5105A
IR 5103
51058 5105A
CAL I
CAL 2
50 KC CRYSTAL
MAIN TUNING
I~IAL ICAL
6
• • 06
o
o • • 06
o
(. I
I 5104
U 910084Figure 1-3. Selective and Wide Band Voltmeter 476J-l; Simplified Schematic.
3
Section II - III Installation - Operation
2.4 INITIAL ADJUSTMENTS 2.4.2 ADJUSTMENTS. Follow the procedure outlined in paragraph 3.3, CALIBRATION, of Section
2.4. I PRIMARY POWER. Attach the line cord con III, OPERATION, for the initial adjustments and nector to recessed male input connector PIOI on the calibration of the unit. If these procedures indicate rear chassis. Check the primary power selector on equipment malfunction, follow the maintenance prothe rear of the unit to ensure proper a-c operating cedures outlined in paragraph 5. 4, Section V. voltages are applied to the power transformer.
SECTION III OPERATI
3.1 GENERAL
The following paragraphs outline the procedures for calibrating the 476J-l and making specific measurements. Refer to figure 3-1 and paragraph 3. 2 for identification of controls.
3.2 CONTROLS
Test adjustments are made from the front of the unit. 8ilk screened labels identify the controls and the values of each switch position. There are five rotary, ganged wafer switches; three potentiometers, and two variable capacitors:
a. I PUT IMPEDANCE switch S101, a doublepole, 9-position 3-wafer rotary switch, which varies the input impedance.
b. INPUT attenuation switch 8102, a double-pole
10-position, rotary SWitch, which s'witches in L-pad attenuators to attenuate the signal.
c. FREQ RANGE switch 8103, a double-pole, 6position rotary switch, which selects the correct LC combination for the selected frequency range.
d. SELECTIVE VOLTMETER RANGE switch S104, a single-pole, 8-position, rotary switch, which switches in series resistance.
e. Function selector switch S105, a double-pole, 6-position, 3-wafer rotary s\vitch which selects the mode of operation.
f. ADJ INPUT potentiometer, RI09, located on the upper left corner, which varies the input impedance.
g. CAL 1 potentiometer R180, located below the meter, which varies the output of the 50 Icc oscillator.
h. CAL 2 potentiometer R156, located just to the right of CAL 1, which calibrates the amplifier sections used in the selective voltmeter application.
i. Vernier-driven variable capacitor C131lVIAIN TUNING knob, located near the dial, which is a broad-tuning control.
j. DIAL CAL trimmer capacitor C132, pointer knob, located to the right of the MAIN TUNING control, which is used for calibrating the dial to exact frequencies.
3.3 CALIBRATION
Follow the steps below in the proper sequence before attempting voltage measurements.
a. Connect the line cord to an a-c receptacle and turn the toggle switch on the front panel to the ON position. Allow the unit five minutes for stabilization.
Transformeil.' primary voltage selector on rear of chassis must be in proper position to match a-c source voltage.
b. Turn function selector switch 8105 to the CAL 1 position.
c. Adjust CAL 1 Potentiometer R180 for an indication of 0 db as shown by meter MI0l.
5
Section III Operation
d. Set I PUT switch 8102, SELECTIVE VOLTMETER GE switch S104, and function selector switch ~105 to 'the CAL 2 position.
e. Turn FREQ R GE switch S103 to the 4-60 position and the tuning dial to the 50 kc position.
f. Adjust the DIAL CAL control C132 until the meter indicates maximum deflection.
g. Reset the dial to the ppropriate test frequency and the switches to the test positions, as specified in the following pa agraphs.
The instrument is now calibrated for normal measurements. If a more accurate frequency _alibration is necessary:
a. Connect a headset to jack JI01 marked
PHO ES.
b. Reset function selector switch 8105 to the 50 KC XTAL position.
c. Set the dial to the red mark nearest the test frequency.
d. Adjust DIAL CAL control C132 until a zero beat is heard .in the headset.
e. Reset the dial to the test frequency and set function selector switch S105 t the SEL VM position.
3.4 VTVM MEASUREMENTS (WIDEBAND)
The 476J-1 measures single or composite signal rms voltage levels or voltage ratios (in db) over the 200 cps to 750 kc spectrum when switch S105 is set in the VTVM position. The measurements can be made on either balanced or unbalanced two-conductor circuits.
NOTE
Compare the output impedance of the circuit under test with the value indicated by PUT IMPED CE switch S101. The two value should be the same. For very low level measurements, the il1put leads should be kept as short as possible. Check all ground connections carefully.
6
3.4. 1 RMS LEVELS. Follow the steps below when making vtvm measurements.
a. Calibrate the meter as instructed in paragraph' 3.3.
b. Set INPUT IMPEDANCE SWitch S101 to the correct position to match the circuit under test.
c. Set INPUT switch S102 to the XIO scale and function selector switch S105 to the VTVM position.
d. Connect the circuit being tested to input terminal EtOI and E102 with the center conductor or ungrounded lead attached to terminal E101.
e. Adju t PU switch S102 for an on-scale met l' indication, and record the indicated voltage (rm ).
3.4.2 VOLTAGE RATIOS. When comparing the voltage ratios of two or more signals in succession:
a. Set INPUT IMPEDANCE switch S101 to the 0-5K position and function selector switch 8105 to the VTVM position.
This operation fixes the input resistance of the unit at 5,000 ohms (non-inductive) and provides a means of calibrating meter M101 to accurately measure voltage ratios of different input levels.
b. Apply the signal which has the highest level of the signal being tested to terminals EI01 and E102.
c. Set INP SWitch S102 to the 0 db position and turn ADJ I 'PUT control R109 for a meter M101 indication of 0 db (0.775 v)
d. Remove the reference voltage (step ) and individually measure the remaining levels on the test circuit. INP r switch 8102 ea) e adjusted to maintain on-scale meter eadings as necessary.
To compute the level indicated by the instrument:
a. Record the meter indication in db.
b. Note the osition of INPUT switch 8102 and SELECTIVE VOLTMETER RANGE SWItch 8104.
c. Add the meter indication and the two switch indications algebraically to arrive at the total level in db: i. e. value in db = -4(meter) -20(SI02) -10(SI04) = -34 db.
3.5 SELECTlVE VOLTMETER MEASUREMENTS
The 476J-l measures harmonic distortion, intermodulation products, crosstalk, attenuation, and modulation characteristics when used in the selective voltmeter application. The following paragraphs describe these measurements. Calibrate the meter as ins tnlcted in paragraph 3. 3 and perform the measurements in paragraph 3.4. 1, a to e, before attempting selective voltmeter measurements. The latter ensures that input levels will not overload the instrument. The instrument has a very narrow bandpass of approximately 200 kc. When making measurements in the SEL VM position, rotate the tuning dial slowly to ensure measurement of all signals. Adjust SELECTIVE VOLTMETER RANGE switch S104 to the -60 db range to measure very low level sigllals. Possible errors in measurement can occur when other spurious frequencies in the vicinity of 1604 to 2350 kc are present. This situation can occur when image signals differ in level by less than 30 db. A low-pass filter can be used at the input terminals to attenuate the spurious frequencies.
3.5.1 HARMONIC DISTORTION MEASUREMENT. Harmonic distortion is measured by recording fundamental frequency levels in respect to harmonic levels. Use the test equipment set-up shown in figure 3-1 and follow the steps below in sequence.
a. Perform steps a and b, paragrapb 3.4.1.
b. Set function selector switch S105 to the SEL VM position.
SIGNALGENERATOR I
II
~
Section III Operation
c. Connect the output terminals of the network under test to input terminals EI0l and EI02 on the 476J-l and tune MAIN TUl\TING control C131 to the fundamental frequency.
d. Set INPUT switch S102 to the +20 db position and SELECTIVE VOLTMETER RANGE switch S104 to the 0 db position.
e. Increase the signal generator output for a fuH scale deflection. Record the level.
f. Tune the voltmeter to the second, third, fourth, ... n harmonics, and record the level of each.
The total harmonic distortion is obtained from the following formula:
2 2 2 2V + V + V +VD%=
2 3 4 nt xl00
2 2 2 2 2V +V +V +V ... +V
1 2 3 4 n
2 2 2 V + V +V xiOO
2 3 n VI
(Derivative formula: 1 2)V = ~ V 1=1 1n
Measurement of levels differing by as much as 75 db can be made by this test. SELECTIVE VOLTMETER RANGE switch S104 indicates up to -60 db; the meter indicates up to -15 db. If the fundamental frequency level is of an inconvenient level for mid-scale meter readings, a potentiometer can be inserted at the input
4 - TERMINAL <:4
476J-1 NETWORK
UNDER TEST " 0" >
' <
POTENTIOMETER ( OPTIONAL)
AMPLITUDE
-+-__L-_--L..__L_f I f 2 f 3
FREOUENCY
U91 010 I
Figure 3-1. Selective and Wideband Voltmeter 476J-l, Harmonic Distortion Measurements.
7
Section III Operation
of the 476J-1. High level frequencies outside the range of test frequencies can be filtered by an optional filter or selective network inserted between the signal generator and the test circuit. See figure 3-2.
3.5. 2 INTERMODULATION MEASUREMENTS. Perform intermodulation measurements in the same way as outlined above for harmonic distortion measurements.
a. Connect the equipment as shown in figure 3-2.
b. Connect the two signal generators shown in the illustration so the intermodLtlation products will differ by at least 500 cycles. The voltmeter can then differentiate between the intermodulation products.
c. Adjust SELECTIVE VOLTMETER RANGE switch S104 to the -60 db position for maximum sensi tivity.
d. Scan the frequency band carefully and record the level of each observed signal.
e. Compare the ratio of the intermodulation product levels to the test tone levels. System specifi cations determine the degree of permissible intermodulation distortion.
3.5.3 CROSSTALK MEASUREMENT. The 476J-1 is used to measure both near-end and far-end crosstalk on open-wire lines or cables. The various crosstalk components can be separated as to level
SIGNAL GENERATOR
and frequency, thus locating the origin of the undesirable frequency components. Measurements are limited on the upper limits by the 476J-1 internal noise voltage, which is approximately 1 microvolt.
a. Connect the signal generator and selective voltmeter as shown by figure 3-3.
b. Adjust the output of the signal generator for a level of approximately -t-23 dbm*. It is necessary to provide a low impedance termination on the generator in some cases to provide a flat output over the test frequency range.
c. Vary the signal g'enerator across the test spechum, at the same time tuning the 476J-1 to the signal generator frequency.
d. Record the level of each measurable frequency component as indicated by meter M101. Intelligible near-end cross-talk attenuation measurements up to 130 db can be measured.
The instrument can also be used as a very sensitive null indicator in a bridge type crosstalk meter. No additional balancing filters are necessary.
The 476J-1 can be used in an actual carrier circuit for analyzing crosstalk on specific channels. Measurements can be made with the meter for purposes of pinpointing the disturbing frequencies. Headphones can be used for audible interpretations of the crosstalk.
*0 dbm reference is 1 milliwatt across a 600 ohm termination.
II
, 4 - TERMINAL 476J-1
IIHYBRID NETWORK
TRANSFORMER I--- UNDER TEST - 0
I OR RESISTI VE
NETWORKS
I -'
SIGNAL GENERATOR
RELATIVE AMPLITUDE
MEASURED FREQUENCY
f l f2
",', ]"",1
L I:..=2-l U91 012
Figure 3-2. Selective and Wideband Voltmeter 476J-1, IntermodLllation .lVIeasurenlents.
I
8
e. Insert the headphones in PHONES jack J10L
f. Set function selector switch S105 to the PHONES position.
g. Vary the dial frequency and listen to the channel being tested.
h. Correlate the audible information with the data compiled by selective voltmeter or vtvm measurements.
3.5. 4 ATTENUATION MEASUREMENTS
a. Initially set INPUT switch S102 to the +20 db position.
b. Tune MAIN TUNING control C131 to the test frequency.
c. Vary INPUT switch S102 and SELECTIVE VOLTMETER RANGE switch S104 in that order to
SIGNAL , DISTURBING CIRCUITGENERATOR \
Section III Operation
provide on-scale indications. Do not overload the instrument.
Attenuation measurements up to 75 db can be made on band-pass filters.
3.5.5 MODULATION CHARACTERISTICS TEST. The 476J-1 is used to measure the frequencies ane! levels of spurious modulation products in multichannel carrier equipment.
a. Modulate the channel under test with a 1000 cps signal.
b. Attach the circuit being tested to INPUT terminals E101 and E102.
c. Set function selector switch S105 to the SEL VM position.
d. Measure the spurious product frequencies and levels in the sequence specified in paragraph 3. 5.
TERMINATION TERMINATION I
/
~ DISTURBED CIRCUIT I
r L ----1
4 76J-1: 476J-1 : I 0 I
III ,
I I o I I , I L ..J
U91 011 I
Figure 3-3. Selective and Wideband Voltmeter 476J-1, Near-end and Far-end Crosstalk Measurements.
9
Section IV Principles of Operation
SECTIO IV P INCIPLES OF OPE ATION
4.1 GENERAL
This section consists of a circuit analysis of the voltmetel' by stages, paralleling the schem.atic diagram, figure 5-1.
The 476J-1 consists of four major circuits:
a. An r-f amplifier with an input matching network and a low pass filter.
b. An 800 kc i-f circuit, consisting of an 804 to 1550 kc vfo, a ring modulator, an 800 kc band pass filter, a stage of resistance-coupled amplification, and another 800 kc band pass filter.
c. A 15 kc i-f circuit consisting of a 785 kc crystal-controlled oscillator, a ring modulator, a 15 kc band pass filter, a variable attenuator, two stages of resistance-coupled amplification, and a cathode follower.
d. A metered output circuit, consisting of another 15 kc band pass filter, three stages of resistance-coupled amplification with feedback, and a metered output. Refer to figure 2-1 for circlli t identification.
e. A 50 kc crystal-controlled calibration oscil lator.
4.2 CIRCUIT DESCRIPTION
4.2.1 INPUT AND AMPLIFICATIO J, The 476J-1 input is either balanced or- unbalanced, dependent on the position of the INPUT IMPEDANCE switch S101. Center INPUT terminal EI02 is at ground potential in the UNBALANCED position. Terminal E103 is at chassis ground potential and can be used for a test equipment common ground.
The signal is coupled through capacitor CIOI or
transformer TIOI, li\lP T IMPEDANCE switch S101B and S101C to the INPUT attenuator switch S102. Through a series of switched resistances, R1l0 through R1l5, input levels of up to +40 db can
10
be measured with ut overloa ing the voltmeter. ADJ INPUT potentiometer R1 9 is a non-inductive variable resistan '8 which further varies the input level. The s'gnal is coupled directly to tube VIOl, a dual-triode untuned resistance-coupled amplifier, and from there to the center tap of function selector switch Sl05B. The 476J-l functions as a vtvm when S105 is in position 4, and as a selective voltmeter in positions 1, 2, 5, and 6. The CAL 1 position is a no-signal pOSitiOI. Filter FLIO 1 is a low pass filter which presents a high imp dance to signals above 750 kc and a low impedance to lower frequencies. The signal is applied from the output of FL101 to the primary windings of ring modulator transformer T102.
4.2.2 800 KC I-F CIRCUIT WITH FILTERING. The ring modulator consists of transform rs T102 and T103, diode emOl through CR104, and potentiometers R127 and R126. The via consists of tube V102, MAIN TUNLlG capacitor CI3l, and a series of switched LC circuits: inductors LI02 through
107 and trimmer capacitor CI3S, C135, C137, C139, CHI, and C143, all switched by FREQ NGE switch S103. Trimmer capacitor CI32 permits accurate calibration of the dial [-1' uency with respect to the input sigllal frequency.
The 800-kc intermediate frequency sigllal is coupled from the output of ring modulator transformer T103 to the input terminals of 800-kc band pass filter FL102. It is then applied from the output of filter FL102 to the grid of tube VI03 and further amplified. The output from VI03 IS applied t a other 800 kc bandpass filter and to the Seaalia ring modulator. The 800 kc fillers pass only a 200 cps bandwidth.
4.2.3 15 KC I-F CIRCUIT WITH FILTER.L.~G. The 800 kc sign ] mixes with a 785 kc signal from the crystal-controlled oscillator, tube VI04, at the second ring modulator. The 15 kc ifference fre-queney is applied to switche series attenuator, SELECTIVE VOLTMETER RANGE switch 8104 and
resistolS R136 through R141. The signal is then applied to resistance-coupled amplifiers VI05 and
VJ 07A, cathode follower VI07B, and to the input of the 15 kc band pass iilter FLI05.
Section IV - V Principles of Operation - Maintenance
4.2.4 OUTPUT CIRCUIT. The 15 kc signal is ap VI08 and VI09 further amplify the signal which is plied from the output of FLI05 to terminals 2 and 5 then applied to output meter MI0l or phones through of function selector switch S105B and to the grid of detector diodes CRUO and CRUI and switch S105A. tube VI08. The three resistance-coupled amplifiers,
SECTION V AI TENANCE
5.1 GENERAL e. Turn the function selector switch S105 to the VTVM position.
Section V, MAINTENAI CE, outlines the procedures for testing and aligning the Selective Voltmeter f. Adjust rheostat R190 for a meter MIOI indi476J-1. Read the provisional guarantee on the in cation of 0 db on the 476J-l side front cover of this manual before attempting to repair any malf~lI1ctions.
WA NING 5.2 RECOMMENDED TEST E UIPMENT
Operation of this equipment involves vola. Oscillator, Hewlett-Packard 200CD. tages that are dangerous to life. When
performing maintenance operations,b. Vacuum tube voltmeter, Hewlett-Packard 400D.
special care must be taken to avoid contact where high voltage is present. RE
c. Oscilloscope, Dumont 304H. MOVE PRIMARY POWER before changing tubes.
5.3 BENCH E AND ALIGNMENT
5.3.2 SELECTIVE VOLTMETER CALIBRATION Follow the steps below in sequence when calibrating the 476J-1. Perform bench test and alignment pro a. Turn function selector switch S105 to the cedures at three month intervals and subsequent to VTVM position.shipment to correct misalignment caused by shipment or tube deterioration. b, Turn FREQ RANGE switch S103 to the 4 - 60
kc position.5.3.1 WIDEBAND VOLTMETER (VTVM)
CALIBRATION c. Tune the instrument to the 50 kc dial indica
tion for a maximum meter deflection. a. Remove the bottom cover plate from the in
strument by loosening the two knurled thumb screwS, d. Adjust CAL 2 potentiometer R156 for a 0 db
indication on the meter. b. Connect an oscillator and a vtvm to the input
of the 476J-l as shown in figure 5-1. Place a 600 200CD 400D 4 7 6,, osc VTVM SELECTI'JE
ohm load termination across the line. VOLTMETER 600n o
c, Adjust the oscillator for an indication of 0 db on the vtvm.
d. Turn the INPUT switch S102 to the Xl, 0 db position.
Figure 5-1.
U91 0001 I
Selective and Wideband Voltmeter 476J-l. Calibration Equipment Assembly.
11
Section V JVhintenance
The instrument now provides equal gai n in the VTVM or SEL VM positions.
5.3.3 SO KC OSCILLATOR LEVEL CALIBRATION. When calibrated in the following manner the 50 kc oscillator can be used fol' an internal calibration reference signal.
a. Turn switches INPUT, S102, the function selector, S105, and the SELECTIVE VOLTMETER RANGE, S104, to the CAL 2 position.
b. Adjust the dial for maximum meter deflection at 50 kc.
c. Adjust CAL 1, R180, for a 0 db meter indication.
The 50 kc oscillator is now adjusted to the correct level.
5. 3.4 OUTP UT AND METER LIGl\ MEl\T
a. Switch the function selector S105 to the CAL 1 position.
b. Adjust rheostat R184 for a 0 db meter inclication.
The last three stages of amplification, VI07 and VI08, and the meter are now properly calibrated to correspond to the 50 kc oscillator calibl'ation.
5.3.5 lORlVIAL CALIBRATIO:\'. After completing the steps of al ignment in the preceedi ng paragraphs, and prior to using the 476J-l for test purposes, again perform the steps of calibration outlined in paragraph 3.3.
5.4 TROUBLESHOOTING
Under conditions of normal operation the 476J-l will
not reqUire more than the routine maintenance spe
cified in paragraph 5.3. The tube complement used has long life characteristics Perform the steps of bench test and alignment outlined in paragraph 5.3 before attempting to troubleshoot the instrument. If the instrument does not function properly, follow the general outline below to help locate the malfunctioning part or stage. Refer to figure 5-1 for locations of electrical components.
a. Remove the protective covers by loosening the knurled thumb screws.
b. Test the tubes in a reliable tube tester.
c. Check the tube voltages. The indicated voltages should agree with those given in Table 1. If, after a test of tubes and tube voltages, the unit does not function:
d. Attach an oscillator, tuned to 5 kc, to INPUT terminals EI01 and EI02. Adjust the input signal level to +20 db and the INPUT level switch S102 to the +20 db position.
e. Monitor the oscillator output signal by placing the leads of an oscilloscope across INPUT terminals EI0l and EI02; then adjusting the vertical input controls on the oscilloscope to show a low-amplitude sine-wave form.
f. Place a probe on one of the oscilloscope leads and trace the signal through the circuit from the Ii\PUT terminals to the output stage. Vary the oscil lator output level at each check point to verify proper operation. When the malfunctioning circuit is located:
g. Perform d-c voltage and resis tanc~ measurements to locate the circuit component which is not functioning. Table I lists the normal operating voltages. Resistance values are shown on figure 5-2.
TABLE 1. AVERAGE D-C OPERATT;-JG VOLTAGES*
I Tube VIOlA, B VI02 VI03 VI04 V105 VI06 IV1 07 A V107B V10SA VI0SB VI09 VIlO
E 1.5 - 2 - 3.5 - 1.0 9.5 1 1 1. 75 -k
I I
E - 120 I
120 150 100 150 - - - - 120 -g2 I
E 90 150 100 210 100 :2.10 80 210 160 145 125 150P
*Meter used must have internal resistance of 2000 ohms/Yolt minimum
12
I R204 402
I I I I S 102A
I 10 634
---. •• 'VVv ~ .",6- "'1\. 2
200
1120.
\ 20K I~
I'"\ 634
1120. 20K
\ R202 ZOK
\ IIZIO " 21419.IK .02
11203 11211
BAL
8.,\1
,.", ~ _-= I
L101 - \ -, - - ~ \
~
%•I ~ ...J CD
CIOI 0.2
~
...J CD
51018
1111'
-~~-
\ \
SIOIA
r--"'"1 C158 ~ ::;:: .01
11101 1"1021"1031"1041"1051"106 619 152 75 198 1635 711
.. 150V DC
+250V DC
I L
,-- I I I liED
IINPUT I
EI02(Q~_B_LU-....:.._-,-\-_--1- ./'
I 1\ / 1\ r / T
EIO)
~
'8""4 5 V 102
4 5 VIO)
'E3"'"4 5 VI05
4 5 V 106
4Q5VI09
9 S 4 VI07
4~108
S.)V AC
•
e'
e
e
., e
-- --- ----..---r CI71
10 UU, 11110 ZOK
11204 13.1K -
C16'
I
CI70
51028
11113
T~4~ ;\ ~
'.0'
\ 318.5
UNBAL - "212 4.32l
-L_ \ -- --- -- -- --'- -- -- --J
TIOSC 17 4 VEL-BIIN 0.1 liED 8L ,40V O-------lIr 0 2BOV AC
liED 220'", AC3COV~
_RED-8LU 280V~ ~160VAC
~O'VEL260V~11 Ol40VAC
D-BLU 125V AClilt
PINK 110 VAC ~
5101 5 5K -:L .J!C1598
CI511A T _ T 50 VIIO AfO-VEL50 ~ OA2
e 8UJ
SI06
CII1I2CRill
\ ~ ---- --
'\ -- -- --- -- _Ji
\ ~ 5102
08 ~ 08 +10PIOI
+20 ,. -.~ ~ JJ.- .', ~::+30
+40 100--' - A - ....... -30
CALZ", /? ~ 10.0.01-40
VIO
I \:~'~11\ ~
\ I \\1
\1
1\
---- - -
CI04 h.001~ RI16 II
~ 4K
CI76 ,Clth°.50 .1 r ~iOI ...., 1000/5000UUF ,- - - -- --RM-=I-- -- -- -- --I, r FLIo2 l
L....-
""
RII8 <; AT 101 L P 8 P I I I I I1000~
~ ATI03 E83F/111I95105 B
•50B/300.l\. J ATI02 CRIOI 30B/150.l\. 800KCI I
-, 30B/150J\. I 17"'~"_ VI03CI08 6~ -' , ~13~_HOOI ...LVIOIB CI06[ JC;107 2 4 I I II . I '.' I IIR,'3 3 148 • .001 CI09 ,', ...AAA_IL Fl1301000 t .~;8 -' JVV'I 2./11, I I I I I ,..100 R 123RII9 rI $ ;v~121
II ~ I I3
( SFll31
j I I I I :? 16211
121RI20J... CI02 ~ R121 .0RI22T 002 1001< T;I~O ~121~ t' 'tl ' !" , ,"T -=- TT' - - -C 112 ---lL -T • T T
15011 DC IIT:-n L ,j I ~eF~ I L __ J...
51058 I L. ,•5· 3;:1 ~.6 ~ 1.-0- II\
\ J J IT 104
\
4
\~ 6
lI06
~ 4
5
c
6 138/275
....L UUF
S103I ~ I/ Fll72 R203\ I
I 711 K~ 500 -- 3000.1\. I 4
4 3 411 2
\ // 'I cr 1 r_II II PHONESe" I SEl lllol J )~ IE 83F/6689• I
FUNCTIONIITIiFlI• C'47 9SELECTOR 497 CAL I I• SI05
... CAL 2 LIOfllO~ L10j.lI02 I r""' '" I I
~ C 146 804 '15501<C II' "" "" II~ 3 6000 I I
2 UUF I
I :j IICI44 C 145 I 261.5 6000 , L 108 WF UuF
CI37 CI43
* * :: I I
150-3' 5103 300-450' . 60- <t.. • 400-600
I ,-.- a --""-"'-1 .. IDIAL CAL I
L_ I--- --- --- --- -- ---."-- --- --- ---- --- --- ---- --- -- I I
.. : ~
- . ........
• '.. • • ._. • II ,
i AM-2 I I I ~: ~
A A A
ECC81/6201',:' C 115
~ A I~ 6 ~L '.2.r -- -- ...,l'20K" -- --, 6,8. CI2l r- WOrFLiOz l A'34 r FLI03 l I FLI04 I I ",.. -1~7501( ~
51.111 I 8P I - IlP I I IPE80~/6084 _
808:KC E811'1 •• 8') 800llC CA 105 . I 15KC 5 I 15KC
\1105 I I I I I
I-B-rl l~ L ~Z.;,':;:16:.;.K:.:.A~_(), 2 ~ K... Z . I K ... r ' ~-r
I I :1.J lI I I'VV~~ I 1 I • ,I : II I I ..~ AI31I I +..LC I 26 CII6'-1' ""- ":' : I I. 'I '> IS 16.211 ~ 10 .2 T ISA 132>
IT 162r-n-o' · I "C1I9
AI47 T 10n-O I I 1l /A~~2 I <: AI49
~ 100I I 'I IIh / I I I I I
1M ~ rrI 1
T T AI521 :1 r- rr -- ,-- r 68.11{ TL _L __ J L __ -.J ATIOS l.:. __ ~ L L_-1
1~8:~SO.n. I I vvv _J__
vvv / r-------- --, ~ > i -,+ 250 VDC ...
~ T '04
AA
~ Elll~/6689
~\I102
~=J' -"""""-'3 V~O
804 -,5'0IlC
~"" ...... -.J
!MER
I-- -- -- -- -- -
\" II
'I 50 KC OSCILLATOR AI87
- ---J...-' ISELEC11VE VOL T ME:: TER RANGE I I 4.42 K l~ ILI09 2 A,-- -1-6 -( ... a.2 785KC V3 I ~
"e5104•< OSCIL LATOR -20061<)OMV 10MV -30DB I I
vv CI67
AI99 C 165 1257 ~ CI,4T1 0.1 UUF
~tJ ~~g021~1I ~ 4.4211 - 40 DB RI18 ! .0032I II
I -I: :C:::--e.~ • 10MV 40.2K"'--lMII - 50 08I
I '=
I ~ I
.Jo---
CAL 2 - 60 DB--e 'Vi ...--' MV E83F/6"9 S II -= I VI06:I -1,'I' lC£"~IEOO I
I9I I III • I
I I I 1~ II 200
t;5 ~~ '"
I RI85 I.6 S'05A I511 I I,l ~~C I I
~C168I+2'OV DC
I ~c I 66I 242
I VI02I """'" 122' ~ 715KC.J.-CIU
UUF A201UVI'-~ I 1621( UUF lzz.5 I I
CIS7 RI86 I-II
III T';:;~U'J ~ 00" II II ~ RI78S
/ L~ _ _: O,J_-0-=---J C 155 48.7K>
56 UU~ \1 II
/ 1 CAII6 ~ 10K"j9
/ i / ...L. CI56 =- .005
~ 11 /
CIH
Hh-:r:::!\ -R193
1\7 100• & &
~vvv
" Vi07B C 120 05 11194
t/ a'ClO... ,r-vvv
~ A A &
VVV RI~5
IN~
~--I
L III z I
I I
89 :5 I I I I I I
fL IO~ V20KAI FLIOSl ,::C I ~ I
r-J"'OI 3TP~I I 300
I I ATI04
908/150.1\. 1 1:;:';: .. A."'V",V
I I ~ If
2 •
iI I j
I T L __ .J
l ~1I171 ~'50
(: "'51 F R \. 6b ~ 6.811{
CI21A 50 E RI59
5.IIK .,. 42.21{~ r,Z41 q'."lln"169
IIVIOBA £CCS/blO I
VIoe8CI61 - __~
_ 02
16~S 7;n~~, --8
~ C'058
11163 ~ ~.
~~~ I ~C.:7J 50
• ..2 51"(· 511K :? • 50 n '-InSO (~"r~'lbl
RI67 ~ C177-1.70.65 10"0.........133
UUF
A192~2.•'1{ IN" (;11,,,
~
i 1.4 "
-• • ... • Z~O voc
'\N\ RI91
1000
,l) 2 1
3~ .,
- 5 .'ICAL I I 11180 ""300
A A .. "VfV---~ "'
7rII
C 123 51058 001
. 51058 SI05A~'~ ~
Sl05A
6 CIIIIO
6 .CAlli5--4 ......-< A 170
S 2001{ 3 ----..
2~ • I -(\1)+ •
1\11101
C129...L c0.5 ""T'" ~a130 ...,.. 1,.5
~o, IPHONES I
II' '"
"
'. RI81 ,#1"', "'I
'...' 16 K AAA yVVV
~R182 (:111 8 3 <:--R'8.
I ~16K ~806~ .150 ..... N[IlT ASSY 1 Q' T Y r USED ION 11Il0 DrSCII'T'OIll
II 178 <: r IN T CAL ~5J CI55
~-- 48.7K ~ APPLICATION ~lJUF
\1
/ AUTHENTICATION IT ITLE 11119 ~7r t
CII 116 101C DIUWII IY SELECTIVE AND WIDEBANDJ HARDIN t- .. C"(CItEDI: PARTir
\1
IY'-' VOLTMETER -=- 005 -L. CI56
A"II0V£D IY 'II0JECT 476J-1
'.1) £1I1.Nrrll C. CRANOR ~SHEE oa"( ellSDIIAWII FEB. 1,1959I-----_J I
'7
TFIGURE 5-2
il
•
o 564 0520 006
Cl 30 ').5
C ~ II'
,., CI
4
IPHONESI
C 129 0.'
5
(;
I~~V)+ •
SI05A
CRIIO
11,70 2001\
.250 \I DC
C 058 !>o
t 8 ~ F 166ll'.l
VI09
11117 1000
C i2 3 5::>
vloe8............. CI61
02
R ISS
~II It
RI91
1000
~162
133
'AI
, - SluSS
Cl23 001
2
I .]
4
I ., ._
, ' S 1058
4
3. SI05A
)
"
APPLICATION --
AUTHENTICATION IT ITLE
NEX" ASSY IlEVI.'OII
110
564 0520 006
CLISTOMER NO.
SHEET. OF SHEETS
PART NO.
REVISIONS
COLlIIS'RADIO COIPAIY DALLAS, TEXAS
OES'"''''''OII110
476 J-I
VOLTMETER
USE D 10 II
SELEtTIVE AND WIDEBAND
FEB. 1.1959
J HARDIN
C. CRANOR D"~E DIl".1I
......"OVED IY
""OJECT EIIIIIIEE"
CHECItED IY
D""WN IY
/ /
~
184
50
"0 INT CAL
FIGURE 5-2 13
SECTION VI AR S LIST
6.1 PART LIST
I
I
I
ITEM
ATIOl
ATl02
TI03
ATl04
ATl05
ClOl
Cl02
Cl03
Cl04
CI05
Cl06
Cl07
Cl08
Cl09
ClIO
Clll
C1l2
DESCRIPTI N
ATTENUATOR PAD:
Same as ATlOl
ATTEI UAT R PAD:
TTEI\TUATOR PAD:
ATTE TOR PAD:
CAPACITOR, FIX D, PAPER: 0.2 fif, fixed film, ±10% vdcw 300
CAPACITOR, lVIOLDED, FIXED, CERAMIC: 2000 fifif
CAPACITOR, FIXED, FILM: . 1 fif 3 0 vdew
CAPACITOR, FIXED, TUBULAR CERAMIC: . 001 f.Lf, 350 vdcw
CAPACIT R, FIXED, DUAL AL MINUM ELECTROLYTIC:
50-50 f.Lf, 350 vdew
CAPACITOR, FIXED, ALUMI JUM ELEC ROLYTIC:
8 f.Lf, 350 vdew
Same as Cl04
Same as Cl04
Sam as Cl06
CAPACITOR, FIXED, PAPER: .005 f.Lf, 1 0 vdcw
CAP CITOR, VARIABLE, CERAMIC: 10 fif.Lf, 500 vdcw
Same as Clll
.
TELLETRA
PART NUMBER YSA-3, APP9780, CEI 2 -;- 5 db, 150 ohms
SA-3, Gr. 6653 CE2, 7 db, 600 ohms
VSA-3 APP 780, C 3 I
7 :- 10 db 150 ohms
VSA-3, Gr. 6653 CEl, 2 7- 8 db, 300 ohms
I
j.
COLLINS
PART NUMBER
15
. eclian VI
Parts List
I DESCRIPTION TELLETRA COLLINSITEM
PART NUMBER PART NUMBER Cll3 CAPACITOR FIXED, FILM:
v
0.1 fl.E, 350 vdew, -5%
Cll4 CAPACITOR, FTXED, F M; .002 !JoE. 150 Ydcw
CllS CAPAClTOR, FIXED, FILM: .01 fl.i, ±10%. 1000 vdew
CllG Same as C101
Cll7 CAPACITOR. FIXED, FILM: .001 p.r, 1000 vel \Y, ±10%
CllS ame as C1l4
CllY CAPACITOR FIXED. AL r , ELECTR LYTIC:
10 p.f, 25 vel
C120 CAPAClTOR. FIXED, FILM: 0.5 flf, 350 vel \V
C121 CAPACITOR, FIXED, AL MI UM . EC ROLYTIC; fiO-50 !Jof 400 vdew
C122 CAPACITOR. FIXED, FILM: 0.2 flr. 35 vdcw
C123 CAPACITOR, FIXED, AL UNUM, ELECTROLYTIC: I
I
60 fif, 12 Ydcw
C124 Same as C123
C125 NOT USED
C1 Same s CIHJ
C127 ame ClOG
Ci28 CAPACITOR, FIXED. FILM; 001 IJ.f, 1000 vdew
,
I
C129 CAPAC!. OR, FIXED FLM: O. 5 fJJ'. 350 vdew
Cl30 Same as C129
I i I
1&
ction VI arts List
ITEM
C150 I NOT USED
Cl51 I NOT USED
CI52 I NOT USED
Cl53 I NOT USED
DESCRIPTION
CI54
CI5S
CI56
CAPACITOR, FIXED, FILM: .0032 0. 350 vdcw
CAPACITOR, ~, CERAMIC, T 56 p.p.f, 500 vdcw
CAPACITOR, FIXED. FILM: . 005. jJ.f, 1000 vdcw
ULAR:
Cl57 I CAPACITOR, FIXED, TEMP., COMP., CERAMIC:
24.8 IJ+li
C15S I CAPACITOR, FIXED, CERAMIC: .01 Il-f, 1000 VdC\l
Cl59 I CAPACITOR, ALUMll\UM. ELECTROLYTIC: 50 0. 400 vdcw
CIGO I CAPACITOR, FlXED, ALUMINUM, ELECTROLYTIC:
50 Il-f, 25 vdcw
CIGI I CAPACITOR, FIXED. FILM: 02 Il-f, 1000 vdcw
C162 I Same as C113
C163 I CAPACITOR, FIXED, TEMP.• COMP., CERAMIC:
122.5 flll-f
Cl64 I CAPACITOR, FIXED, TEMP., COMP., CERAMIC:
817 1·li·.I.!
Cl65 I Same as C1l3
Cl66 I CAPACITOR, FIXED, TEMP., COMP., CERAMIC:
242 f.LUf
C167 I CAPACITOR, FIXED, TEMP., COMP., CERAMIC: 12570 flIl-f
TELLETRA PART NUMBER
,
COLLINS PART NUMBER
1
..
c tion V1
Part- Li t
ITEM
Cl50 NOT SED
DESCRIPTION TELLETRA
PART NUMBER
COLLINS
PART NUMBER
C151 NOT USED
C152 NOT SED
Cl53 NOT USED
C154. CAPACITOR, FIXED, .0032 !-Lt, 350 vdcw
FILM:
C 55 CAPACITOR. FIXED, 5G f.l.f.l.-f, 50 vdcw
C RAMIC, T ULAR:
Cl56 CAPACITOR, FIXED, • 005. jJ.f, 1000 vdcw
FILM:
"
C 57 CAPACITOR, FIXED, TEMP., COMP., CERAMIC.
24.. 1J.jJ.£
CIS8 CAPACITOR FIXED, .01 fJl, 1000 vdcw
CERAl\fiC:
C159 CAPACITOR, ALUMINUM, 50 jJ., 400 vdcw
ELECTROLYTIC:
C16 CAPACITOR, FlXED ELECTROLYTIC:
50 lJ-I, 25 vdcw
ALUMINU ,
CIGI CAPACITOR, FIXED, .02 fJ-f, 1000 vdcw
FILM:
Cl 2 Same as Cl13
CI 3 CAPACITOR, CERAMIC:
122.5 fJ-l-lf
FIXED, TEMP., COMP.,
C1 4 CAPACITOR, CERAMIC:
817 )-LlJ-f
FIXED, TEMP., COMP.,
CIG5 Same as C1l3
C166 CAPACITOR, CERAMIC:
242 flUf
FIXED, TEMP., COMP.•
C16? CAPACITOR, CERAMlC. 12570 jJ.1-li
FIXED, TEMP., COMPo
18
Section VI Parts List
ITEM DESCRIPTION TEUETRA
PART NUMBER COLLINS
PART NUMBER C131 CAPACITOR, VARIABLE, VERNIER
DRIVE , MAIN. T NlNG: 4-12 Wf; Telettra Gr. 4555/1
C132 CAPACITOR, TRIMMER, APC: Gr. 3120/14
C133 CAPACITOR, VARIABLE, CERAMIC: 6-30 !-Lflf
C134 CAPACITOR, CERAMIC, TEMP., COMP.: 354 flflf
I
C135
C136
Same as C133
C ACITOR, CERAMIC, TEMP. COMP.: 320 flf.lf
C137 Same as C133
C138 CAPACITOR, TEMP., COMPo , CERAMIC: 275 Wf
VSA-2, Gr. 6653/T.22
C139 Same as C133
C140 C ACITOR, TEMP., COMP., CERAMIC: 224.5 flf
VSA-2, G4. 6053/T.22
CHI Same as C133
C142 CAPACITOR, TEMP., COMP., CERAMIC: 354 !-Ltd
VSA-2, Gr. 66S3/T.22
C143 ame as C133
C144 CAPACITOR, TEMP., COMP., CERAMIC: 261. 5 Wf (2)
VSA-2, Gr. 6653/T.22
C14 C PACITOR, PRECISION CERAMIC: 6000 f.lf.Lf, ±l. 2%, 250 vdcw
C146 Same as C145
C147 CAPACITOR, TEMP., COMP., CERAMIC: 248. 5 f.l!-Lf (2)
VSA-2, Gr. 6oS3/T.22
C14 CAPACITOR, FIXED: 0.2 flf, 350 vdcw, ±10%
C149 CAPACIT R, FIXED, CERAMIC: O. 2 jJ.f, 400 vdcw
17
ee ion VI Pa t List
ITEM
ClSO
Cl51
C152
Cl53
C154
C155
C156
C157 '"
Cl
C15
C160
Ci61
CI6
163
CI64
CI65
CI66
Cl67
NOT USED
OT USED
rOT USED
OT USED
CAPACITOR, .0032 IJ.f,
CAPACITOR, 56 IJ.lJ.f, 500
APACTTOR, • 005. IJ.f,
CAPACITOR,
CERAMIC: 24. f!+lf
CAPACITOR, .01 IJ.f,
APACITOR, 50 ~.Lf.
CAPACITOR, ELECTROLYTIC:
50 IJ.!,
CAPACITOR, .02 IJ.f, 1000
Same as Cll3
CAPACITOR, CER C:
122.5 f!+lI
CAPACITOR, CERAMIC:
817 ~f
Same as Cll3
CAPACITOR, CERAMIC:
242 f-W.
CAPACITOR, CERAMIC' 12570 IJ.fll
TRLETRA COLLINSDESCRIPTION
PART NUMBER PART NUMBER ::
FIXED, FILM: 350 vdew
FIXED CERAMIC, TUBULAR: dew
FIXED, }'ILM: 1000 dew
FIXED, TEMP., COMP.,
FIXED, CERAMIC: 1000 "dew
ALUMIN , ELECTROLYTIC: 400 vdew
FlXED, ALUMINUM,
25 vdew
FIXED, FILM: dow
FIXED, TEMP., COMP.,
FIXED, TEMP., COMP.,
FIXED, TEMP., COMP.,
FIXED, TEMP., COMP.,
I
18
Section VI Parts List
ITEM DESCRIPTION TELLETRA
PART NUMBER COLLINS
PART NUMBER C168
C169
C170
CRIOlCRI04
CR105
CR106CR109
CR11OCRIll
CRlI2CRU
CR116
CR117CR120
DSI01
00102
F101
FI02
FLI01
FLI02
FL103
FLI04
FLl05
CAPACITOR, FIXED, TEMP., COMP., CERAMIC: 1225 fJ+J.f
CAPACITOR, VARIABLE, CERAMIC:
Same as C169
CRYSTAL DIODES:
CRYSTAL DIODE:
CRYSTAL DIODES:
CRYSTAL DIODES:
SELENWM RECTIFIERS:
CRYSTAL DIODE:
Same as CRIl2-CR115
LAMP, MI ATURE, BAYONET: o. 7, 6.3 vac
Same as DS101
FUSE, 1/4 A, 250 v
FU E, 2A, 250 v
FILTER, LOW PASS: 750 kc
FILTER, BAND PASS: 800 kc
FILTER, BAND PASS: 800 1c
FILTER, B 1) PASS: 15 kc
FILTER, BAND PASS: 15 kc
VSA-3, 82081/10E Phillips
VSA ,P. 13155
VSA-3, P.7821
Same as CR101-CR104
Same as CR105
VSA-3, P. 11400/10
Same as CR105
VSA-3 Gr. 9861
VSA-3, Gr. 9857
VSA-3, Gr. 9858
FSA-3, Gr. 9859
VSA-3, Gr. 98GO
I
262 3240 00
264 4020 00
2644070 00
19
~l'etiol1 Vl
P:-I1"t: Ligt
ITEM
JIOI
DESCRIPTION
PHO.:E JACKS:
TELLETRA
PART NUMBER
VSA-3 Gr. 9
COLLINS
PART NUMBER
LlOl r.;D CTOR. RADIO FREQ E, CY: VSA-3. Gr. B.27613, Ll
961.
Ll02 1 mGCTOR, RADIO FREQ E, CY: VSA-3, Gr. 6653, B.339 I, L1
Ll' nm CTOR, RADIO FREQUE CY: VSA-3, Gr. 6653 .3 9 2, L2
Ll04 I ~D CTOR RADIO FREQ ENC~: VSA-3, Gr. 6653, B.33963, L3
105 IND CTOR RADIO 'REQUE CY: SA-3, Gr. 6653, B.33964, L4
Ll06 I 'DUCTOR. RADIO FREQUE CY: VS B.
- • G .6653. 396 , L5
LI07 I JDUCTOR, RADIO FREQUEJ CY: VSA-3, B.3396
Gr. 6653, , L6
LlOS m CTOR, RADIO FREQU NCY: VSA-3, Gr. 6653, B.33561. L7
L109 IND CTOR, RADIO FREQ CY: VSA-3, Gr. 9852 B.371 4, L1
LUO INDUCTOR, RADIO FREQ UE CY: VSA-3, Gr. 9851 B.33961, Ll
Llll IND C OR, RADIO FREQ E CY: VSA-3, Gr. 2372 P.33962. 2
Ll12 INn CTOR, RADIO FREQ E CY: VSA-3. APP.9780 1. 402. 02 11
PI01 P UG MALE -Conn ctor, ac:
Rl RESISTOR. FIXED, 619 ohms. :to. 5%.
FIL 1 w
RI02 RESISTOR. FIXED. 152 ohm • ±O. 5%,
FI 1 w
RI03 RESISTOR, FIXED. FILM: 75 ohms, :to. 5%. 1 "
R104 RESISTOR. FIXED, 9 o!mlS: ±O. 5%,
FILM:
1 "
20
•
I
SGction VI
Part List
ITEM
RIO.>
RIOo
-RI
RIO
RI09
RllO
RIll
R1l2
Rll3
R1l4
RU5
Rl1G
Rl17
Rll
R1l9
R120
R121
DESCRIPTION
RESISTOR, FIXED, FILM:
163.5 ohms, =0.5% 1w
RESISTOR, FIXED, FILM: 7 .7 ohms, ±0.5% 1w
RESISTOR. FIXED, FILM: 124 ohms, -0.5%, I \V
RESISTOR. FIXED, FILM: 2740 ohms, ±2%, 1/2 w
RESISTOR, VARIABLE,I JOO -INDUCTIVE:
5.000 ohms, ±10%, 2 w
RESISTOR, FIXED, FIL 20,000 ohms, ±0.5%,
RESISTOR. FIXED, FIL II: G340 ohms, ±0.5% 1/2 w
RESISTOR, FIXED, FILM: 2000 ohms, ±O. 5%, 1/2 w
RESISTOR, FIXED, FILM: 34 ohms, ±0.5%, 1/2w
ESISTOR, FIXED, FILM: 200 ohms, ±0.5%, 1/2 w
RESISTOR, FIXED. FILM: 63. '* ohms, fa. 5%, 1/2 w
RESISTOR FIXED, 400C ohms, + %, 10 w
RESISTOR. FIXED FILM: 4750 ohms, I2%, 1 w
RESISTOR, FIXED, FILM: 1000 ohms, ±2%. w
RESISTOR, FIXED. FILM: 100 ohms, =2%, 1/4 w
RESISTOR, FIXED, FILM: 121 ohms, ±0.5%. 1/2 w
RESISTOR, FIXED FILM: 100,000 ohms, ±2%,
TlLLETRA COLLINS PART NUMBER PART NUMBER
WIRE-WO ND,
:
1/2 w
WIRE WOU D:
1/2 w
21
Section VI Parts List
ITEM
R122 Same as R120
DESCRIPTION ULLETRA
PART NUMBER COLLINS
PART NUMBER
R123 Same as R120
R124 RESISTOR, FIXED, FILM: 133 ohms, ±2%, 1/2 w
R125 RESISTOR, FIXED, FILM: 10 ohms, ±2%, 1/2 w
R126 RESISTOR, VARIABLE, 10,000 ohms
FIXED, FILM:
R127 Same as R126
R12 RESISTOR, FIXED. FILM: 715 ohms, ±0,5%, 1/2 w
R129 Same as R128
R130 Same as Rl18
R131 RESISTOR FIXED, FILM: 16) 200 hms, ±2%, 1/2 w
R132 RESISTOR, FIXED, FILM: 162 ohms, ±2%, 1/2 w
R133 RESISTOR, FIXED, FILM: 15,800 ohms, ±2%, 1 w
R134 RESISTOR, FIXED, FILM: 51, 100 ohms, ±2%, 1 w
R135 RESISTOR, FIXED, FILM: 10,000 hms, ±2%, 1 w
R136 RESISTOR, FIXED, FILM: 13,700 ohms, ±O. 5%, 1/2 w
R137 RESISTOR, FIXED, FILM: 4320 ohms, ±0.5%, 1/2 w
R138 RESISTOR, FIXED, FILM: 1370 ohms, ±O. 5%. 1/2 w
R139 RESISTOR. FIXED, FILM: 432 ohms, ±O. 5%, 1/2 w
Rl40 RESISTOR, FIXED, FILM: 137 ohms, iO.5%, 1/2 w
22
Section Vl Parts List
I.
ITEM DESCRIPTION
R141 I RESISTOR, FIXED, FILM: 43 2 ohms, ±O. 5%, 1/2 w
R142 I RESISTOR, FIXED, FILM: 20 ohms, ±0.5%, 1/2 w
R143 I RESISTOR, FIXED, FILM: UO, 000 ohms, ±2%, 1 w
R144 I RESISTOR, FIXED, FILM: 787,000 ohms, ±2%, 1 w
RI45 I RESISTOR, FIXED, FILM: 100,000 ohms, ±2%, 1 w
R146 I RESISTOR, FIXED, FILM: 2740 ohms, iO.5%, 1/2 w
R147 I RESISTOR, FIXED, FILM: 1, ODD, 000 ohms, ±2%, 1/4 w
Rl48 I RESISTOR, FIXED, FILM: 825 ohms, ±2%, 1/2 w
R149 I RESISTOR, FIXED, FILM: 100 ohms, ±O. 5%, 1/2 w
R150 I Same as R149
R151 I RESISTOR, FIXED, FILM: 23700 ohms, to.5%, 1/2 w
R152 I RESISTOR, FIXED, FILM: 68,100 ohms, iO. 5%, 1/2 w
R153 I RESISTOR, FIXED, FILM: 249 ohms, iO. 5%, 1/2 w
R154 I RESISTOR, FIXED, FILM 1000 ohms, iO. 5%, 1/2 w
R155 I Same as R147
R156 I RESISTOR, VARIABLE, COMPOSITION: 300 ohms. ±20%, 2 w
R157 I RESISTOR, FIXED, FILM: 10,000 ohms, i2%, 1/4 w
RISS I RESISTOR, FIXED, FILM: 810 ohms, ±2%, 1 \V
TELLETR PART NUMBER
COLLINS PART NUMBER
23
Section VI Par s List
<C
ITEM
R159
DESCRIPTION
RESISTOR, FIXED, FILM: 5110 ohms, ±2%, 2 w
,
TELLETRA PART NUMBER
COLLINS PART NUMBER
R160 RESISTOR, FIXED, FILM: 8250 ohms, ±2%. 1 w
RI6l RESISTOR, FIXED, FILM: 10, 000 ohms, ±2%, 1 w
R162 RESISTOR. FIXED, FILM: 133 ohms, -0.5%, 1/2 w
I
R163 RESISTOR, FIXED. FILM: 511,000 ohms, ±2%, 1/4 w
RI64 RESISTOR, FIXED, FILM: 162 ohms, -2%, 1/2 w
R16S Same as R163
R166 RESISTOR, FIXED, FILM: 40.2 ohms, ±2%, 2 w
R167 RESISTOR, FIXED, FILM: 70.65 ohms, ±O 5 %, 1/2 w
R168 Same as Rl6I
R169 RESISTOR, FIXED FILM: 42, 200 ohms, ±2%, 1 w
I
R170 RESISTOR, FIXED FILM: 200,000 ohms, ±2%, 1/4 w I
Rl71 RESISTOR, FIXED. FILM: 150 ohms, ±O.59i, 1/2 w
R172 RESISTOR, FIXED, FILM: 17,800 ohms, -2%, 1 w
R173 RESISTOR, FIXED, FILM: 1000 ohms, ±2%, 1/2 w
Rl74 RESISTOR, FIXED, FILM: 100,000 ohms, ±2%, 1/2 w
R175 NOT USED
R176 • OT USED
Rl77 NOT USED
24
Section VI Parts List
ITEM DESCRIPTION TELLF"RA
PART NUMBER COLLINS
PART NUMBER R178 RESISTOR, FIXED, FILM:
4 ,700 ohms, -2%, 1/2 w
R 7 RESISTOR, FIXED, FILM: 10.000 ohms, ±2%. 1/2 w
R180 RESISTOR. VARIABLE, COMPOSITION: 300 ohms, ±20%, 2 w
R181 RESISTOR, FIXED, FILM: 16,000 ohms, ±0.5%, 1/2 w
R182 Same as RI81
ID8 RESISTOR, FIXED, FILM: 80.6 ohms, ±O.5%, 5 w
R184 RESISTOR, VARIABLE, TAPPED, WW: 3 0 ohms, 10 w
RI85 RESISTOR, FIXED, FILM: 511 ohms, ±0.5%, 1/2 w
R186 RESISTOR, FIXED, FILM: 100,000 ohms, ±2%, 1/2 w
R187 RESISTOR, FIXED, FILM: 4420 ohms, ±2%, 1 w
RIBS RESISTOR, FIXED FILM: 40,200 ohms, ±2%, 1 w
RI89 RESISTOR, FIXED, WW CERA1\IIIC: 5,000 ohms, 10 w
R190 RESISTOR, TAPPED VARIABLE, WIRE WOUND:
1000 OhnlS, 10 w
R 91 RESISTOR, FIXED. FILM: 1000 ohms, to.5%. 1/2 w
R192 RESISTOR, FIXED, FILM: 2490 ohms, ±0.5%, 1/2 w
Rl93 RESISTOR, FIXED, FILM: 100 ohms, ±2%, 1/4 w
R194 Same as R193
RI95 RESISTOR, FlXED. FILM: 1000 ohms, ±2%, 1 w
25
'~ctio VI
Parts LIst
ITEM
R196
DESCRIPTION
RESI TOR, FIXED, FILM: 6 '10 ohms, ±2%, 1 w
TELLETRA PART NUMBER
COLLINS PART NUMBER
R197 Same as RI95
ID9 RESISTOR, FIXED, LM: 40,200oh.nLs, ±O. -%, 1 w
RUl9 RESISTOR, FIXED, FILM: 4420 ohms, =2%, I w
R200 Same as RISS
R201 RESISTOR, FIXED, FILM: 162,000 ohms, ±O. 5%, 1/2 w
R202 Sam as R19!
S101 SWITCH, ROTARY, WAFER: Double-pole, 9-positi n, 3-wafer, sin Ie terminal shorting
1 2 SWITCH ROTARY, WAFER: Single-pole, 10 p 'ition, single wafer, si Ie term.inal shorting
S103 SWITCH ROTARY, WAFER: Double-pole, 6-position, single wafer, single te millal shorting
8104 SWITCH, ROTARY, WAFER: Smgle-pole, 8-position, single wafer, single terminal sorting
Sl05 SWITCH, ROTARY, W FER: 3-pole, 6-positiOll, double wafer, sin rle terminal shorting
106 SWITCH: Sp t ggle
8107 SWITCH: Spdt toggle
TlOl TRANSFORMER, RADIO RE UE CY: VSA-3, Gr. 9865
T.412.120
TI02 TRAl'SFORMER, RADIO FREQUE CY: VS -3, Gr. 6653, T.399.51
TI03 'fRA J8FORMER, RADIO FREQUENCY: VSA-3, Gr. 6653, T. 413.155
26
I
Section VI
Parts List
ITEM
TI04
TI05
VIOl
VI02
VlO3
VI04
VI05
VI06
VI07
VI08
V109
VllO
DESCRIPTION
TRANSFORMER, RADIO FREQUENCY:
TRANSFORMER, RADIO FREQUENCY
TUBE, MINIATURE, 9-PIN: ECC88/6922
TUBE, MIN1ATURE, 9-PIN: E83F/6689
Same as VlO2
Same as VI02
T E, MI ATURE, 9-PIN:
E80F/6084
Same as Vl02
I TUBE, Ml IIATURE, 9-PIN: ECC81/6201
Same as Vl07
Same as V102
TUBE, OCTAL, 8-PIN, GLASS: I OD3
I
I
TELLETRA. PART NUMBER
VSA-3, Gr. 6653 T.398.56
VSA-3, Gr. 2374 T. 400.164
COLLINS PART NUMBER
255 0332 00
255 0355 00
,
255 035400
255 0218 00
255 0001 00
~
I,
27
5 June 1959
ADDENDUM SELECTIVE AND WIDI1:BAND
VOLTMETER 476J-1
Section 6. I, P RTS LIST, has been changed as follows:
Delete: (1) Tube, octal, 8-pin, Glass: OD3. CPN 255 0001 (){)
(1) Fuse, l/4A, 250V CPN 2644020 00
Add: (1) Capacitor, Fixed, Film. 0.5uuf. (Cl71)
(1) Capacitor, Fixed, Electrolytic. 50 uf, 12 vdcw. (CIn)
(1) Capacitor, Fixed, Film. 0.1 uf, 1000 vd '\ • (C174)
(1) Tube, glow-discharge diode voltage regulator, 7-pin miniature. CPN 257005 00
(1) Fuse, .375A, 250V CPN 264 4021 00
(1) Capacitor, Fixed, Film: 3.3 uuf (C173)
(1) Capacitor, Fixed, Film: 3.3 tIuf (C175)
(1) Capacitor, Fixed, Molded, Ceramic: 1000 ±5000 uuf (value optional) (C176)
(1) apacitor, Fi ed, lVloldecl, Ceramic: 1000 uuf, 150 v (C177)
(1) Resistor, Fixed, Film: 500-3000 ohms (value optional) 1w (R203)
(1) Resistor, Fixed, Film: 402 ohms ±l%, 0.5 w (R204)
Change: Attenuatol' Pad AT101 from 150 ohms to 300 ohms
Attenuator Pad AT102 from "same as A1'101" to VSA-3 APP9780, CE2, 3 db, 150 ohms
Attenuator Pad AT103 from 7 db, 603 oluns to
3 db, 150 ohms
Attenuator Pad AT104 from 10 db to 8 db
AttcllLwtor Pad AT105 from 300 ohms to 150 ohms
5 Jun 1959
ADDENDUM SELECTIVE D WIDEB ND
VOL METER 476J-1
Section . I, PARTS LIST, has been changed as follows:
Delete: (1) Tube, octal, 8-pin, Glass: OD3. CPN 255 0001 00
(1) Fuse, 1/4A, 250V CPN 264 4020 00
Add: (1) Capacitor, Fixed, Film. 0.5uuf. (Cl71)
(1) Capacitor, FL"ed, Electrolyti. 50 uf, 12 vdcw. (Cl72)
(1) Capacitor, Fixed, Film. 0.1 uf, 1000 vdcw. (C174)
(1) Tube, glow-discharge diode voltage regulator, 7-pin miniature. CPN 257 0052 00
(1) Fu e, .375A, 250V CPN 264 4021 00
(1) Capacitor, Fixed, Film: 3.::J uuf (C1 i J)
(1) Capacitor, Fixed., I"ilm: 3.3 Huf (C175)
(1) Cupacitor, Fixed, l\lolded, C:;ramic: 1000 ±5000 uuf (value optional) (C176)
(1) Capacitor, Fixed, Molded, Cerfimic: 1000 uuf, 1.,0 v (C177)
(1) Resistor, Fixed, Film: 500-3000 ohms (value optional) 1w (R203)
(1) Re::;istor, Fixed, Film: 402 ohm::> ±l%, 0.5 w (D 20-1)
Change: AttenuataI' Pad AT101 from 150 ohms lo 300 ohms
Attenuator Pael AT10l [rom Its ne a' AT101" lo . S -3 APP9780, CE2, 3 db, 150 ohm
Attenuator Pael AT10,: [rom 7 db, 60~ hm to
3 db, 150 ohm::;
Attenuator Pad AT104 from 10 db to 8 e1b
AttenuataI' Pad AT10S [rom 300 ohms to 1.,0 ohms