taRAT) OF “P" BRANCH

R ES TRI CT ED

A.F.O. 2423/44

(FOR OFFI CIA L USE ONLY)

N ot to be communicated to anyone outside H .M . Service

A D M I R A L T Y FLEET ORDERVALVES, THERMIONIC—SUBHEAD F.4.—AMENDMENTS

TO LIST

A d m ir a l t y , S.W .l,4th May, 1944.

The following Order having been approved by My Lords Commissioners of the Admiralty is hereby promulgated for information and guidance and necessary action.

By Command of Their Lordships,

To all Commanders-in-Chief, Flag Officers, Senior Naval Officers,Captains and Commanding Officers of H .M . Ships, Vessels, and C.O.Craft (See A.F.O. 494/44), Super­intendents or Officers in Charge of H.M . Naval Establishments, and Admiralty Overseers concerned.

Note.—The scale of distribution is approximately half that shown in the Admiralty Fleet Order Volume, 1941, Instructions, paragraph 10.

jfeSAD p p « p _________

(67095)

2423 22423.—Valves, Thermionic—Subhead F.4—Amendments to List

(N.S. 33169/43.— 4 M ay 1944.)

T he Appendices to A .F .O . 648/44 should be am ended as follows :—

A p p e n d i x A

Subhead F — Item 4Section A

A ction requ ired P a tte rn N o. D escrip tion

Amend to read CV.24CV.55

CV.24— H L.41 CV.55 (see~lso CV.977)

Delete CV.190 CV.190

A fter CV.199 add ................. CV.200CV.202

CV.200CV.202

After CV.211 add CV.214CV.217CV.218CV.221CV.223CV.224CV.225CV.230

CV.214CV.217CV.218CV.221CV.223CV.224CV.225— ACT.17 DV.55

Amend to read CV.559 25Z.6GT

After CV.559 add CV.562 35L.6GT

After CV.574 add CV.578CV.579

6A .8G6A .8

After CV.581 add .............................. CV.582 6C.5

After CV.589 add CV.590 6SJ.7G

After CV.597 add .............................. CV.600CV.603

5CP.110

After CV.620 add CV.621 801

A fter CV.625 add CV.626 808

A fter CV.627 add .............................. CV.628CV.630CV.631

811826828

A fter CV.634 add .............................. CV.635CV.636

833A836

After CV.637 add .............................. CV.638 838

A fter CV.639 add CV.640CV.641

860861

After CV.642 add CV.643CV.644CV.645

874875876

2423A p p e n d ix A —contd.

Section A—contd.

A ction requ ired P a tte rn No. Description

A fter CV.693 add

%

CV.697CV.700CV.703CV.705CV.706CV.709CV.710CV.711CV.712CV.715CV.977

12SJ.712SR.712K .81D.5GP6U.7GR X .235W E.368A32386F.5G T P a ir o f CV.55

A fter CV.1025 add ... ... CV.1028 VR.28

A fter CV.1033 add ... CV.1035 VR.35

Am end to read ... CV.1038 V R.38— N R .26

A fter CV.1040 add ... • . . CV.1044CV.1045CV.1046CV.1047

V R.44VT.45VT.46VT.47

A fter CV.1050 add ... ... CV.1051 VT.51

A fter CV.1057 add ... ... CV.1058 VT.58

Am end to read ... ... CV.1065 V B .65—A R P.36

Against CV.1075 delete ... . . . ... 6L .6G

A fter CV.1079 add ... ... CV.1082 VR.82

Am end to read . . . .. . ... ... CV.1083 N R .41— VR.83

After CV.1100 add ... ... CV.1101CV.1102

V R .101V R .102

Am end to read ... C V .l l l l VU. I l l — AU.5

After CV.1208 delete ... ... CV.1213CV.1214CV.1217

N T.24 (0 ) N T.30 (O) N T.33 (O)

A fter CV.1223 delete ... ... CV.1224 N T.41A (0 )

After CV.1235 delete ... ... CV.1236 NT.59A

A fter CV.1291 add ... ... CV.1293CV.1294

N T.38 N T . 10

A fter CV.1347 add ... ... CV.1355CV.1363

AU. 7D E T .16— A T.200B

After CV.1366 add ... ... CV.1368 A TP.7

A fter CV.1411 add ... ï .. CV.1413 U U .6

(67095) A*

2423 4A p p e n d ix A — contd.

Section A—contd.

A ction required P a tte rn No. D escrip tion

Amend to read CV.1421 X P.1 .5V

After CV. 1429 add CV.1430 A C SP.3R HCV.1431 A C T .16CV.1433 EC.31CV.1434 EM .4CV.1435 GU.20CV.1436 H L .2KCV.1437 K T.44CV.1438 K T.61CV.1439 M T.9FCV.1440 M T.9LCV.1441 MT.12ACV.1442 MT.14CV.1443 U.10CV.1444 42SPTCV.1445 4012 ACV.1446 4017BCV.1447 4030CCV.1448 4043CCV.1449 4064BCV.1450 4228ACV.1451 4274ACV.1452 4300ACV. 1453 4378CV.1454 225DUCV.1455 41IUCV.1456 Pen 383CV.1457 V P. 133CV.1458 4 IM PCV.1459 MTT.2CV.1460 X.41CV.1461 U .22CV.1462 A.915CV.1463 CBL.31CV.1464 E F.39CV.1465 MT.16CV.1466 P.57CV.1467 PY .3/600CV.1468 SP.4CV.1469 Z.22CV.1470 3P.270B

After CV.1501 add ............................... CV.1503 VR.503

Delete CV.1577 P a ir o f CV.55

After CV.1909 add ............................... CV.1910 6F.5G /G T

After CV. 1946 add .............................. CV.1947 6L .6G

After CV.1958 add CV.1960 6R .6

Section B

After CV.1212 add ............................... CV. 1213 N T .24 (0 )CV.1214 N T .30 (0 )

5A p p e n d ix A —contd.

Section B—contd.

2423

A ction required | P a tte rn No. D escrip tion

A fter CV. 1216 add ..............................1

CV. 1217 N T .33 (0 )

A fter CV.1218 add CV.1224 NT.41A (O)

A fter CV.1234 add CV.1236 NT.59A

A fter CV.1278 add .............................. CV.1295 NT.45

Section CAfter CV.113 add CV.190

CV.226

CV.231

CV.190Noise C rysta l fo r Noise

Am plifier.L am p, N eon 110E/61

A fter CV.986 add CV.987CV.988

NC.13AL am p, N eon W.4251

A fter CV. 1139A add CV.1385CV.1432

ACR.13P E . Cell CMG .8

A p p e n d i x B

A ction required Old P a tte rn No. New P a tte rn No.

After 1260 add ... , . . 1347 CV.1226

After 1457 add 1512A CV.1240

A fter 4589 add 45624562a

CV.1293CV.1221

Page 9After 6380 add 6675D CV.1233

After 7403 add 7404 CV.1151

After 7431 add 7434 CV.1295

Amend to read ... 7448C CV.1275

After W .612 add W.613 CV.1279

A fter~W .l2iQ add W.1241 CV.1249

Amend to read ... W .1280W .1295

CV.1956CV.1947

After W . 1921 add W.1927 CV.1197

Page 10After W .2193 add .............................. W .2510

W .2511W .2512W .2514

CV.1255CV.1254CV.1148CV.1256

2423 6

A p p e n d ix B — contd.

A ction required O ld P a tte rn No. New P a tte rn No.

P age 10— contd.A fter W .2515 add W .2529 CV.1198

W .2536 CV.1257

A fter W .4000 add W .4251 CV.988

Amend to read ... W .7371 CV.1413W .7372 CV.574W .7984 CV.1307W .8174 CV.977

After W .8382 add .............................. W .8850 CV.1421

Old R .A .F .R eference No.

New P a tte rn No.

A fter 55059 add 10E/4 CV.108210E/5 CV.1083

Arnm d 10E/83 to reed 10E/88 CV.1118

A fter 10E/164 add 10E/189 CV.979

Am end to read ... 10E/223 Cy.983

After 10E/278 add .............................. 10E/279 CY.110210E/280 CV.1101

After 10E/305 add .............................. 10E/348 CV.106710E/382 CV.1503

Delete ... 10E/467 CV .86

Page 11CY.1863After 10E/587 add 10E/598

A m end to r e a d ................. 10E/756 CV.984

A fter 10E/8239 add ............................... 10E/8399 CV.1028

A fter 10E/9601 add .............................. 10E/9779 CV.1035

A fter 10E/9829 add ............................... 10E/10542 CV.104410E/10557 CV.104510E/10558 CV.104610E/10559 CV.1047

After 10E/10945 add .. . . . . ... 10E/10946 CV.1051

A fter 10E/11403 a d d ............................... 10E/11405 CV.1058

A fter 110E/59 add ............................... 110E/61 CV.231

Page 12CV.693A fter 110E/190 add 110E/191

7A p p e n d i x B — contd.

2423

A ction required T ype New P a tte rn No.

Page 12— contd. A fter 1D.5G add 1D.5GP CV.705

A fter 3D.100A add . . . ... 3P.270B CV.1470

A fter 5C/450A add 5CP.1 CV.600

A fter 6A.7 add 6 A. 8 6A .8G

CV.579CV.578 o r CV.579

After 6B .8G add 6C.5 CV.582

Am end to read ... 6C.5G CV.581 o r CV.582

A fter 6F .5 add ... 6F.5G /TG6F.5G T

CV.1910CV.715

Page 13Am end to read ... 6L .6G CV.1947 or CV.1948

A fter 6Q.7GT add 6R .6 CV.1960

A fter 6R .7G T add 6S.7G CV.1974

A fter 6SF.5G T delete ... 6S.7G CV.1974

After 6SJ.7 add 6SJ.7G CV.590

After 6U.5/6G.5 add ... 6U.7G CV.706

After 9D.2 add 10 CV.603

A fter 12J.5G T add 12K.8 CV.703

After 12SC.7 add 12SG.712SJ.7

CV.693CV.697

4A fter 12SQ.7GT add .„ 12SR.7 CV.700

A fter 30 add 3235L.6GT

CV.711CV.562

After 37 add 38 CV.712

A fter 41 add 41IU 4 IM P

CV.1455CV.1458

A fter 42 add 42SPT CV.1444

Transfer 6Y .6G to follow 6X .5G T ... 6Y .6G CV.515

Page 14A fter 211 add ... 225DU CV.1454

A fter 645 add ... 801 CV.621

A fter 807 add ... 808 CV.626

A fter 810 add ... 811 CV.628

(07095)

2433 8

A p p e n d ix B — contd.

A ction required T ype j New P a tte rn No.

’age 14— contd.After 813 add ... ............... 826 CV.630

828 CV.631

A fter 832 add ... 833A CV.635836 CV.630

After 837 a d d ............................................ 838 CV.638

After 843 add ... 860 CV.640861 CV.641

After 872A add ............................... 874 CV.643875 CV.644876 CV.645

After 1853 add 4012A CV.14454017B CV.14464030C CV.1447

A fter 4033A add 4043C CV.14484052A CV.1186

After 4056A add 4064B CV.1449

After 4212E add 422SA CV.1450

After 4242A add 4274A CV.1451

A fter 4279A add 4300A CV.14524378 CV.1453

After 9005 add 38015 CV.625

After A AO add A .915 CV.1462

After A C.2/Pen add ... ACR.13 CV.1385 »ACSP.3 (R H ) CV.1430

After ACT.9 add ACT. 16 CV.1431ACT. 17 CV.225

A rrester L igh tn ing CV.986

After A R .8 add A RD D .5 CV.1054

After A R P .35 add A R P .36 CV.1065

After A R T H .2 add ............................... AT.200B CV.1363

After A TP.4 add A T P .7 CV.1368

After AU. 3 add ............................... AU.5 C V . l l l lAU.7 CV.1355

After B olom eter 14KW add ... CBL.31 CV.1463

After C L.33 add CMG.8 CV.1432

After D E T .5 add ............................... D ET.16 CV.1363

9A p p e n d i x B — contd.

2423

A ction required T ype N ew P a tte rn No.

Page 14— contd. After D O .24 add

A fter EBC .33 add

A m end to read ...

A fter E F .36 add

After E L .2 a dd ...

Page 15After GU.12 add

A fter H A .2 add

A fter K T .8 add

Amend to read .. ■

A fter K T .44 add

A fter L am p N eon A P.6712 add

Delete ...

After L igh tn ing A rrester add...

After M H.4 add

After M S/Pen add .................

A fter NC.13 add

After N R .23 add

Page 16A fter N T .4A add

A fter N T . 37 add

A fter N T .43 add

A fter NT.45A add

A fter NT.57A add

DV.55 CV.230

EC.31ECH .35

E F .9

CV.1433CV.1347

CV.1427

E F .39 CV.1464

EM .4 CV.1434

GU.20 CV.1435

H L .2K CV.1436

K T.33«

K T.44

CV.1503

CV.1437

K T.61 CV.1438

L am p N eon A .P . W .4251

L am p N eon 110E/61

\ CV.988

\ CV.231

L.410 L.63 _

CV.1152CV.1067

L.63L.410

CV.1067CV.1152

MH.41 CV.1505

M T.9FM T.9LMT.12AMT.14MT.16MU. 2N oise C rystal NC.13A

CV.1439CV.1440CV.1441CV.1442CV.1465CV.1459CV.226CV.987

N R .26 CV.1038

N T. 10 CV.1294

N T.38 CV.1293

N T.45

N T.46R

CV.1295**

CV.1227

N T.57D CV.1233

2423 10A p p e n d i x B — contd.

A ction requ ired T ype N ew P a tte rn N o.

P age 16— contd. A fter N T .57T add

Amend to read ...

Delete . . .

A fter P .41 add

A fter P en 45 add

A fter P M .2 add

Page 17 Delete ...

A fter P X .25 add

After R K .48A add

A fter SP.2 add

A fter TZ.40 add

After U .20 add

Amend to read ...

After U U .5 add

A fter VP.41 add

A fter V R.18 add

After V R.27 add

A fter V R.40 add

A fter V R.78 add

N T.58

09J

P.215

P .57 P.215

P en 383

PM .4D X

PM .4D X

PY .3/600

R X .235

SP.4

U .10

U.22

U U .4

U U .6V alve C ircuit

U n it A V alve C ircuit

U n it B Valve C ircuit

U n itC V alve C ircuit

U n i tE V alve C ircuit

U n it F V alve C ircuit

U n it L V alve C ircuit

U n it M V alve C ircuit

U n it N V alve C ircuit

U n it P

V P .133

V R.19

V R.28V R.35

V R.44

VR.82VR.83

CV.1288

CV.963

CV.1019

CV.1466CV.1019

CV.1456

CV.1152

CV.1457

CV.1019

CV.1028CV.1035

CV.1044

CV.1082CV.1083

11 2423A p p e n d i x B — contd.

A ction required T ype N ew P a tte rn No.

Page 17— contd. After V R . 100 add VR.101

VR.102CV.1101CV.1102

A fter V R.130 add V R.130A CV.1130

A fter V R .l50/30 add ... V R.503 CV.1503

A fter VT.42A U.S.A. add ................. VT.45 A.M. CV.1045

A fter VT.45 U .S.A. add ................. V T.46 A.M. CV.1046

A fter VT.46A U.S.A. add VT.47 A.M. CV.1047

A fter V T.50 A.M. add VT.51 A.M. CV.1051

A fter VT.57 U .S.A. add ................. VT.58 A.M. CV.1058

P a g e 18After VT.103 U .S.A. add VT.104 A.M. CV.1104

Am end to read ... ... VT.114 U .S.A. CV.1846

A fter V T.114 U .S.A. add VT.115 U .S.A. CV.1948

A fter VT.202 U .S.A. delete ................. VT.104 AJVL VT.115 U .S.A.

CV.1104CV.1948

A fter V T.205 U .S.A. add ................. VT.209 U .S.A. CV.693

A fter VT.506 A.M. delete a ll V alve C ircuit U n its .

A fter VU.39A add VU.64 CV.1064

A f te r V \J . \ \ \a d d VU.113 CV.1113

A fter V U .120 add VU.120A CV.1120

A fter W .21 4 p in add ... W E.368AX.41

CV.710CV.1460

A fter X .66 add X P.1.5V CV.1421

A fter Y .63 add Z.22Z.62

CV.1469CV.1192

After ZA.2 delete Z.62 CV.1192

<67095) Wt. 8092/2356 14,000 5/44 . Hw. G.338/10.

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