Type Maker or cv No. Type Maker or cv No. Type …CEIE USA (CV2680) CS6B BTH B8B/IC STC CEIV USA CS31A /3""'1-/ CV~022. Bl2 20th CE (CV494) CE2 USA CVl764 CS7A BTH Bl2E 20th CE (CV2142)

CHAPTER 11

TYPE DESIGNATION/CV TITLESType Maker or cv No. Type Maker or cv No. Type Maker or cv No.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearestin brackets) in brackets) in brackets)

ABCI MulIard, AC/S2 MOV AK2 MullardTungsram AC/S2 Pen Mazda (CVI282) ALl (CVI59) .ABLI Mullard, AC/THI Mazda CV2830 AL60 Mullard (CV9)Tungsram AC/TP Mazda (CVI718) AMI Tungsram

ABLI/P Mullard ACT6 MOV CV2825 APP4A Tungsram (CVI683)AC/DD Mazda, (CV1170)(CV28)Hivac ACT9 MOV APP4B Tungsram (CV118l)AC/DDT Hivac (CV2813) ACTIO MOV CV2827 APP4C Tungsram (CVI684)

ACTl2 MOV APP4E TungsramACjDG Mullard ACTl4 MOV APP4G Tungsram CV2836ACjHL Mazda CV28 I I ACTI5 MOV APP4G* Tungsrarn (CV2837)AC/HL Mazda CV2812

(Met.) ACTl6 MOV CVl431 AP4 Mullard (CV1175)AC/HL/DD Mazda CV2813 ACTl7 MOV (CV225~ APV4 Tungsram (CV1039)ACH/P Hivac (CVI282) ACTl9 MOV (CV379 ARDDI WO CV1300

ACT21 MOV ARDD3 WO CV1301AC/L Hivac (C;VI732) ACT22 MOV (CV257) ARDD5 WO CVI054ACMI MOVACM2 MOV ACT23 MOV (CV288) ARD2 WO CVI078ACM3 MOV ACT24 MOV (CV240) ARD4 WO CV1302ACP Mazda CV2815 ACT25 MOV (CV436) ARHI . WO CVl280

ACT26 MOV( c:v2.lb~)

ARPI WO CVl118AC/Pen Mazda (CV1174) ACT27 MOV ARP2 WO CVl320ACPT8 MOV CV2818ACPT9 MOV AC/VH Hivac (CV3788) ARP3 WO CV1321ACPT21 MOV AC/VP (0) Hivac (CV11 69) ARP4 WO CVl322AC/P4 Mazda (CV207) AC/VPB (0) Hivac (CV2832) ARP5 WO CV1323

AC/VPI Mazda CV518 (0) ARP6 WO CV1324AC/Q Hivac (CV1326) AC/VP2 Mazda CV2832 ARP7 WO CV1325ACRI WO CV1379ACR2 WO (CV1379) AC/VS (0) Hivac (CV1165) ARP8 WO CV1326ACR2X WO CV1380 AC/Y (0) Hivac (CV1174) ARP9 WO CV1327ACR3 WO CV1386 AC/YY Hivac (CVI326) ARP9A WO CVl328

AC/Z (0) Hivac (CV1181) ARPlO WO CVl329ACR4 WO CV1387 ACjZDD (0) Hivac ARPll WO CV1330ACR5 WO CVl388ACR6 WO CV1389 AC042 Mullard ARPl2 WO CV1331ACR7 WO CV2745 AC044 Mullard (CVl168) ARP12T WO CV2841ACR8 WO CV1381 AC2 ARP13 WO CV1332

AC2/HL Mazda CV2806 ARP14 WO CV1333ACRlO WO CV1382 AC2/HL Met Mazda CV2807 ARP15 WO CVl195ACRll WO CV1383ACR12 WO CV1384 AC2/P Mazda ARP16 WO CVI074ACR13 WO CV1385 AC2/Pen Mazda CV2808 ARP17 WO CVl186ACR14 WO CV1390 AC/2 ARP18 WO CV1334

Pen DD Mazda (CV519) ARP19 WO CV1335ACR15 WO CV1391 AC3 MulIard ARP20 WO CV1336ACR16 WO CV1392 AC4 MullardACR17 WO CV1393 ARP21 WO CVl192ACR18 WO CV1394 ACj4 Pen Mazda (CV1326) ARP22 WO CV1337ACR19 WO CV1395 ACj5 Pen Mazda CV2809 ARP23 WO CV1124

ACj5 ARP24 WO CV1338Pen DD Mazda (CV1196) ARP25 WO CVl181ACR20 WO CV964 ACj6 Pen Mazda (CV1189)

ACR21 WO CV1397 ACj7 Hivac (CV1683) ARP26 WO CV1340ACR22 WO CV252 ARP33 WO CV1341ACR23 WO CV1398 AC104 Mullard (CV1161) ARP34 WO CV1053ACjS CV2819 ADl WO CV1314 ARP35 WO cV1091ADjP4 Mazda (CV1198) ARP36 WO CVI065AFH202 EEV (CVI2)

AC/SG Mazda CV2822 AFX203 EEV (CV2868)ACjSGVM Mazda (CV1165) ARP37 WO CV1342ACjSH Hivac (CV1677) AF3 Mullard CV2833 ARP38 WO CV1343ACjS Pen CV2824 AF7 MulIard ARS6 WO CV1317ACjSPl Mazda CV2820 AF35 Cossor ARS7 WO CV1318AF350 Cossor (CV12522) ARS8 WO CV1319AH200 EEV (Cvlb:z'l?AC/SP3 Mazda CV2823ACjSP3 RH Mazda CV1430 AH201 EEV (CV32) ARTH2 WO CV1347AC/SP3 AH205 EEV (.. V~l;-',l ARTPl WO CV1344RH (Sel) Mazda CV545 AH21 1 EEV ~(":;3~1 . ARTP2 WO CV1345ACjSl VM Mazda (CV1165) AH213 EEV <~ t7'3) IAR2 WO CV2838ACjS2 Mazda (CV1677) AH221 EEV (CV5) AR4 WO CV1303

(C\lI4-3.r)

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CV Specification Numbers against Commercial and earlier Govt Designations

Type Maker or CV No. Type Maker or CV No. Type Maker or CV No.

Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearest

in brackets) in brackets) • in brackets)

AR5 WO CV11 66 AX9003 Amperex BR132 EEV

AR6 WO CV1304 AZl Mullard, CV2860 BR137 EEV

AR7 WO CV1109 Tungsram BR137B EEV

AR8 WO CV1306 AZ2 Mullard, CV2861 BR140 EEV

AR9 WO CV1307 Tungsram BR147 EEVAZ3 Mullard

ARI0 WO CV1308 ~Mullard BR151 EEV

A.Rl1 WO CV1655 AZ31 Tungsram CV2862 BR152 EEV

AR12 WO CV1653 LPhilips BR153 EEV (CV2159)

AR13 WO CVI664 BR154 EEV

AR14 WO CV1312 AZ32 {MUllard (CV286l) BR154 EEVTungsram

AR15 WO CV1313 AZ41 Philips CV3892 BR155 EEV

AR16 WO CV1032 A40 Mazda CV2800 BRI61 EEV (CV2322)

ARl7 WO CVI037 A41 Mazda (CV1175) BR165 EEV

AR20 WO CV1663 A40/N3 Mullard CV280l BR175 EEV C \f ~O4-

AR21 WO CY1055 BR179 EEY (CV2 23)A41 Mazda (CV1175)

AR63 EEV CV3710 A206 EEVlCJ~\bO)

BR189 EEV

AR300 Rogers CV2839 A207 EEV BR191 EEV

Arrestor l CV986A208 EEV BR194 EEV

AP55059 j A209 EEV BR195 EEY

ASPT Ferranti BS4 BTH (CVI89)

ASP1 Ferranti A214 EEVA373 MOV (CV1184) BS4A BTH CV1859

ASP1E Ferranti A800 MOV (CY412) BS5 BTH (CV233)

AS4120 Tungsram (CVI677) A819 MOV (CYI698) BS48 BTH CV460

AS4125 Tungsram A863 MOV BS52 BTH CV1841

ATP4 WO CV1366 BS60 Mazda (CV527)

ATP5 WO CV1367 A901 MOV (CVI722)A915 MOV CV1462 BS62 CV1858

ATP7 WO CV1368 A915 met MOY CV2803 BS64 BTH Cv 174-3ATPI0 WO CV1369 A915A met MOY CV2804 BS82 BTH (CV463)ATP25 WO A924 MOV CV2805 BS84 BTH (CV462)

ATP35 WO CV1370 AI~J'S t(\{25"7-~) BS92 BTH (CV461)ATP75 WO CV1371 A1065 MOV (CV1343)

A1685 MOV BSlOO Mazda (CVI219)ATP100 WO CV1372 AI714 MOV (CV408) BT5 BTH (CVI147)ATP600 WO CV1373 A1820 MOV (CV409) BT9 BTH CV1145ATR387 USA CV3539 A1834 MOV

C.v'll~OBT9A BTH (CV1146)

ATR388 USA CV3874 1.~;klt UsA BT9B BTH (CV13)ATS25 WO CV1374 MOV

A2087 MOV (CV2171) BT17 BTHATS25A WO CV1364 A4229 USA CV824 BT19 BTH (CVl144)ATS70 WO CV1365 BD7 BTH BT27 BTHATS250 WO CVI031 BD10 BTH BT29 BTHAT4 Mullard (CV117l) BT35 BTH (CV1147)AT15 WO CV2845 BD12 BTH

BD28 BTH BT41 ·BTHAT16 WO CV2846 BD78 BTH (CV2125) BT45 BTH (CV22)AT20 WO CV1361 BES2 MOV BT61 BTHAT26 WO CV1360 BG4 BT69 BTHAT35 WO CVI025 BT75 BTH (CV489)AT75 WO CV1222 BIC/IE STC (CV433)

BK24 BTH (CV2124) BT79 BTH (CV372)AT80 WO (CV25) BK34 BTH BT83 BTH ~CV2110)

AT200A WO CV2850 BK42 BTH BTR32 Ferranti CV458)AT200B WO CV1363 BK44 BTH c.. \f '1,+2- BTR34 Ferranti (CV459)AU1 WO CV1264 vsA

BUI00/6 Edison CV2867AU2 WO CV1349 Bl1.S <-.v fOt.' (3l);J.~/4

SwanBK46 BTH ~OlsW'RI\l cvS-003

AU3 WO CV1064 BK56 BTH BW124 EEVAU3A WO CV1039 BK66 BTH BW126 EEVAU4 WO CVI113 BL63 MOV (CVII02) BW128 EEV

c VZb<t~AU5 'VO CVl111 BOL014MW STC CV984 BW129 EEVAU6 WO CV1072 BW137 EEV

AU7 WO CV1355 BM4A Ferranti BW137C EEVAD8 WO CV1356 BM6A Ferranti BW140 EEV (CV2871)AU12 WO CV1266 BM8A Ferranti BW147 EEVAU13 WO CV1863 BM12A Ferranti - BW151 EEVAWl WO CV1358 BRl GPO BW153 EEV (CV2872)

BvJl~"l. c." ;, ~s"AW2 WO CVI070 BR124 EEV BW155 EEVAW3 WO CVll10 BR125 EEV BW156 EEVAW4 WO CV1068 BR126 EEV BW160 EEVAW5 WO CV1359 BRl28 EEV BW161 EEVAW6 WO CV1077 BR129· EEV cJ2~<g9 BW165 EEV

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Type Maker or CV No. Type Maker or CV No. Type Maker or CV No.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearest

in brackets) in brackets) in brackets)

BWl68 EEV c" j~OOCBL31 Philips CVl463 CRTType CV2880

BWl73 EEY Mul1ard 4/1BW175 EEV Tungsram CRT/51 EM! (CV487)BWl79 EEV CB2 Tungsram CR139 EEVBW189 EEV PhiIips CR176 .

EEV (CV2324)CCH35 MuIlard - CSTI-6000 Mul1ard

BW194 EEV TungsramBW1304 CCIL Hivac CST2-12 MuIlardBIC/IC STC CV2734 CC2R Hivac CSI (0) BTHBIC/lE STC (CV433) CS2-A BTH (CVI03)B2A USA CV2565 ce2 PhiJ.ips CS2-C BTH CVl907

CC3D Hivac CV2870 'CS3-A BTH (CV253)B2B/lC STC CC3L Hivac (CV2266)B2B/2C STC CEIA/B USA CS3-B BTH CVI844B4B/IC STC (CV536) CEIC USA (CV2692) CS4B BTH (CV2258)B6 20th CE (CV2140) CS5 BTHB6E 20th CE (CV2141) CEID USA (CV2680) CS6A BTH

CEIE USA (CV2680) CS6B BTHB8B/IC STC CEIV USA CS31A /3""'1-/ CV~022.

Bl2 20th CE (CV494) CE2 USA CVl764 CS7A BTHBl2E 20th CE (CV2142) CE20 USA CVl474 CS7C BTHBl2H CTI-500 MuIlardB21 MOV CV2864 CE25 USA (CV405) CTI-2500 MuIlard

CE72 USA CV709 CTI-6000 MullardB24 20th CE (CV2143) CE230 USA CV812B24E 20th CE (CY2144) CGI-C BTH (CV425) CV5 STC CV5B30 MOV CV2865. CGI-E BTH (CV425) CV56A AD CVl487B36 MOV (CV925) CV56B AD CVl488B65 MOY (CV278) CG4C BTH CV56C AD CVl489

CG5C BTH CV56D AD CV1490Bl42 EEV CVI927 CG6C BTHBl50 EEV CG7C BTH CV61 Blue AD CV297B217 Philips (CV1021) CGl4 (CV496) SpotB228 Philips (CV1673) CV61 Red AD CV331B230 (0) Hivac (CV1032) CKI Philips Spot

MuIlard CV61 Green AD CV332B240 Philips (CV1032) - Tungsram SpotB262 Philips (CVlO18) CK502AX Raytheon (CV385) CV61 Blue A AD CV333B309 MOV (CV455) CK505AX Raytheon (CV443) CV61 BlueB AD CV334B406 Philips (CV3621) CK506AX Raytheon (CV387)CAA322 USA CVl904 CK707 Raytheon CV2848 CV69A AD CV1475

CV69B AD CV1476CAM1 MOV CKI005 Raytheon CV2874 CV69C AD CVI477CAM2 MOV CK5704 Raytheon CV2847 CV69D AD CVl478CAM3 MOY CK6148 Raytheon CV76A' AD CVl479CAM4 MOV CK6149 Raytheon "CAM5 MOV CK6150 Raytheon CV76B AD CVl480

CV76C AD CVl481CARI MOV (CVI601) - CV76D AD CVl482CAR2 MOV CK6151 Raytheon CV99A AD CVl483CAR4' MOV (CV1602) CK1035537 Raytheon CV99B AD CVl484CAR5 MOV CLI PhilipsCAR6 MOV CL2 Philips

CU Philips CV2875 CV99C AD CVl485CATl MOV (CV1600) Mul1ard CV99D AD CVl486CAT2 MOV (CV1606) Tungsram CV151 Red AD CV340CAT3 MOV CV151 Green AD CV341CAT4 MOV CVl9lA AD CV991CAT6 MOV (CV2871) CL33 Mullard CVl40l-

TungsramCAT9 MOV (CV2872) CMG8 GEC (CVI432) CVl9lB AD CV992CATIO MOV CMG22 GEC (CVI473) CVl91C AD CV993CATI2 MOV CMG25 GEC (CV242) CVl9lD AD CV994CATl2A MOV CMG25 (R.S) GEC (CV250) CWS24A GEC CVl968CATl4 MOV CX25 USA CVl766

CATl4C MOV CMG25 GEC (CVI472)CATl4SW MOV short CYl MullardCATl5 MOV CRM71 Mazda PhilipsCAT17 MOV CV533 CRM91 Mazda TungsramCATI8 MOV CRM92 Mazda CYIC Mullard .

CRMl21 Mazda PhiIips

MOV'CY2 MulIard

CAT20 PhilipsCAT20C MOV (CV42I) CRMl22 Mazda TungsramCAT21 MOV CRMl23 Mazda CY3 PhilipsCBLI Philips CRMl51 Mazda CY31 Mullard CVl402

Mullard CRTI MAP CV2878 PhilipsTungsram CRT2 MAP CV2879 Tungsram

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Designation' Originator (or nearest Designation Originator (or nearest Designation Originator (or nearest


Cl Philips DC3/HL Mazda DF64 Mullard CV;1..2&0

CIA USA (CV2868) DC51 (0) Mullard (CVl) DF66 Mullard (CV2107)

CIB USA CVl765 DC70 Mullard (CV2275) DF70 Mullard (CV443) c.:.

CIC Philips CVl400 DC80 Mullard DF72 Mullard (CV2101)

CIK USA CV2790 Philips DF73 Mullard (CV2103)

DDAI BrimarC6A USA CV714 DF91 Mullard (CV785)

C6J USA DDU Cossor (CVI691) DF92 Mullard (CVI758)

C9A STC DDL13 Cossor (CVI695) DGP Cossor (CVI141)

C9B STC DD Pen Cossor DG2 Mullard

ClO/SS/2G STC (CV2794) DDPP4B Tungsram DG3-l MullardDDPP4BS Tungsram

C12A STC DG4-1 MuIJardCl2B STC (CV2315) DDPP4M Tungsram (CV519) DG4-2 MullardC12D STC DDPP6B Tungsram DG7-5 Mullard (CV2175)

Cl2FM STC DDPP39 Tungsram DG7-6 MulIardC12R STC (CV429) DDPP39M Tungsram DG13-2 Mullard (CV2191)

DDPP39S TungsramC14BM STC DG92 MullardCl4HM STC CV3535 DDR2 Mullard (CVI73) DH MOV (CVI665)Cl4JM STC DDRI00 Mullard DHL CossorCI6GS/2G STC CV2745 DDT Cossor CV2813 DH30 MOV (CVI695)C17BM STC DDT (Met) Tungsram CV2890 DH63 MOV (CV587)

STCDDT2A Tungsram

C17JM DH63M MOV (CV587)Cl43 EEV (CV26) DDT4 Tungsram (CV2813) DH73M MOV CV2909CI44 EEV (CV2666) DDT4S Tungsram DH76 MOVCl78 EEV DDT13S (0) Tungsram DH77 MOV (CV452)Cl80 EEV (CV788) DDT16 Cossor DH81 MOV (CV882)

LVIC~~ DDT135 TungsramC200 USA CV2988 DHlOl MOVC203A USA CV2986 DDX52 Mullard (CV2232) DHI07 MOVC243N Philips (CV11 18) DD4 Cossor (CV1170) DH149C7501 . USA CV2869 Tungsram DKl Mullard CV2910DA Ferranti (CVl109) DD4S Tungsram DK31 Mullard

DACl Mullard CV2887DD6 Cossor (CVI40)

DK32 Mullard (CVI802)FerrantiDAC3l Mullard DD6G Tungsram (CVI40) DK40 MullardDAC32 MuIIard (CVI820) DK91 Mullard (CV782)DAF70 Mullard (CV2104) DD13 Tungsram DK92 MullardDAF91 Mullard (CV784) DD13S Tungsram DK96 Philips

DAF96 PhilipsDD41 Mazda CV1403 (CV1661)DD207 Mazda DL MOV

DAGl Mullard CV2 DD620 Mazda CV2889 DLL31 MullardDAP Cossor DLSD EdiswanDASl Mullard DLSI EdiswanDA30 MOV CV563 DD818 (0) Tungsram DLSlO Ediswan (CVI90)

DA41 MOV (CV1076)DEQ MOV (CV1156)

DLS15 EdiswanDER MOV (CVI642)DA60 MOV CV527 DET1SW MOV CV2895 DLS16 EdiswanDA90 Mullard (CV753) DET2 MOV DLSI7. EdiswanDAI00 MOV (CVI219) DL2 Mullard CV2911DA250 MOV DL31 Mullard

DBC31 MullardDET3 MOV (CV1034)

DL33 MulIard (CV819)DET5 MOV (CV1223)

DBM4A Ferranti DET6 MOV (CVI620) DL35 Mullard (CVI803)DBM6A Ferranti DET9 MOV CV2899 DL36 MullardDBM8A Ferranti DETIO MOV CV2900 DL41 MulIardDBM12A Ferranti DL51 MulIard

DB4-1 Mullard DET12 MOV (CVI288). DL63 MOV CV2912DB4-2 Mullard DETl6 MOV (CV1363) DL64 Mullard (CV233I)DB7-5 Mullard DET17 MOV DL66 MulIard (CV2106)DB7-6 Mullard DETl8 MOV (CV419) DL68 Mullard (CV2259)DB13-2 Mullard DET19 MOV (CVI8) DL70 Mullard (CV2105)

DCC90 Mullard (CV808) DET20 MOV (CV6) DL71 Mullard (CV385)DCHL Mazda DET21 MOV DL72 Mullard (CV387)DCH3l MulIard DET22 MOV (CV273) DL73 Mullard (CV2299)DCP Mazda DET23 MOV (CV354) DL75 Mullard (CV2102)DC Pen Mazda DET24 MOV (CV397) DL82 MOV

DCSG Mazda DET25 MOV (CVI02S) DL92 Mullard (CV820) c.vDC2P Mazda (CV173S) DE5 MOV CV2891 DL93 Mullard (CV807)DC2 Pen Mazda DE5B MOV CV2892 DL94 Mullard CV2983DC2/SG Mazda DF3l Mullard DL95 Muliard (CV818)DC2/SGVM Mazda DF33 Mullard (CVI823) DL96 Philips

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DM4 EBF81 MulIard EF39 Mullard (CV1053)DM6 20th c.B. (CV2146) ,PhiJips TungsramDM70 MulIard, CV2980 EBL1 Mullard Hivac

Philips Tungsram EF40 MullardD024 Mullard (CV1040) EBL21 Mullard EF40 Philips CV3885D026 Mullard (CV1178) EBL31 Mullard CV2926 EF41 Mullard

Tungsram EF41 Philips CV3886D030 Mullard (CV1178) EB34 MulIard (CV1054)D060 Mullard (CV1206) Tungsram EF42 MulIardDP4-1 Mullard EF42 Philips CV3887DP4-2 Mullard EB41 Mullard EF50 Mullard (CV109l)DP13-2 Mullard EB41 Philips CV3881 EF51 Mullard (CV305)

EBC41 Philips 'CV3882 EF52 Mullard (CV327)DQP Cossor (CVl121) EBF8P 'MullardDR7-5 Mullard EB91 Mullard (CV140) EF54 MulIard (CVl136)DR7-6 MulIard EF55 Mullard (CV173)DR13-2 Mullard ECC31 Mullard (CV1285) EF70 Mullard (CV467)DS Ferranti (CV2979) ECC32 Mullard (CV181) EF71 Mullard C V475"

ECC33 'Mullard EF72 Mullard (CV465)DSL103 ECC34 'MulIardDS Pen Cossor ECC35 Mullard (CV569) EF73 Mullard (CV46~DS103 MWT (CV94) EF80 Mullard CV 1)1DS250T Cossor ECC40 Mullard EF81 PhilipsDT70 USA ~V798(0) ECC40 Philips CV3884 Mullard

ECC81 Mullard (CV455) EF85 Philips C v 1'~75

DVSG Cossor ECC82 MulIard ~CV491) MullardDVS Pen .Cossor ECC83 'Mullard CV492) EF86 Mullard CV2901DV3 STCDV32 STC (CV88) ECC91 Mullard (CV858) EF91 Mullard (CV138)DV34 STC (CV127) ECH2 Mullard EF92 Mullard (CV131)

'Tungsram EF93~i~~t.~

(CV454)DV40B STC (CV228) ECH3 MulIard CV2929 EF94 lP C. v:<)'.2 4DV55 STC (CV230) Tungsram EF95 Mullard ~V~§O)DV56 STC (CV234) ECH4 MulIard M ~> ~o ?-DW2 MulIard (CV1443) ECH21 MulIard 500 Ediswan . I

DW4/350 MulIard CV1796 EHA5000 Ediswan CV2687

MullardECH22 MulIard (CV302) EHF350 Ediswan

DW4/500 (CV1064) ECH33 Mullard CV2930 EHM2 GEC (CV2139)DY70 MulIard (CV224l) ECH35 MulIard (~V1347) EHM25 /lEJir c oJ') 10)/D1 Mazda (CV1078) Tungsram EFP(PoD2 USA CV2778 ECH42 MulIard EHT1 MO (CV19)D4 Ferranti (CV1037) ECH42 Philips CV3888 EHT3A MOV} EHT3C MOV

D15 STC ECH80 MulIard EHT15 EdiswanD41 MOV (CVl187) Philips EHT16 EdiswanD42 MOV CV557 ECH81 MulIard (GV2128) ,D61 Mazda (CV1092) Philips EHW3000 EdiswanD63 MOV CV554 ECL80 Mullard EHW5000 Ediswan CV2686

ECR30 Mullard (CV1588) EHZ350 EdiswanD77 MOV (CV140) ECR35 Mullard (CV1587) EK2 Tungsram CV1426D210 Hivac (CV102l) MulIardD400 Tungsram (CV1170) ECR60 Mullard (CV1097) EK32 'MulIard <C;V1057)D418 (0) Tungsram (CV1686) EC31 Mullard CV1433

(CV1687) EC50 Mullard CV2927(0) EK90 Philips (CV453)EABC80 Philips, EC52 MulIard (CV1l37) Mullard

Mullard EC53 MulIard (CV1l97) ELL1 MullardTungsram

EAC91 Mullard (CV137) EC54 Mullard (CV66) EL2 Mullard CV1429EAF42 Mullard EC55 Philips (CV273) TungsramEAF42 Philips CV3883 EC70 Mullard (CV468) EL3 MulIardEAT1500 Ediswan EC80 Philips/ CV1886 TungsramEA50 Mullard (CV1092) Mullard EL3C USA CV822

L' v;,J:! EC81 ;philips/ CV1865EA76 Mullard (CV469) MulIard EL4 Tungsram

EBC3 Mullard CY1428 PhilipsTungsram EC90 Mullard (CV133) EL5 Tungsram

EBC21 Mullard (CV347) EC91 Mullard (CV417) Philips

EBC33 Mullard (CV1055) EE50 Mullard EL5B Electronics CV 2936Tungsram EE8020 - CV2967 EL22 'Mullard (CV304)

EBC41 Mullard EF8 Mullard (CV1713) EL31 Mullard CV2888Tungsram

EBC80 Mullard EL32 Mullard (CV1052) ,Philips EF9 Mullard CV1427 EL,3 Mullard CV2938

EBC90 MulIard (CV452) Tungsram TungsramPhilips EF22 Mullard (CV303) EL35 Mullard (CV1286)

EBF2 Mullard CV2925 EF36 Mullard (CV1056) EL36 Mullard CV2940

EBF32 Mullard CV501 EF37 Mullard (CV358) Tungsram

EBF80 Mullard EF37A Mullard (CV35~ EL37 Mullard CV586Philips c: v'i<J 0

/~1.. rO~ C \/{"d C(3

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....Type Maker or CV No. Type Maker or CV No. Type Maker or CV No.

Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearestin brackets) in brackets) in brackets)

EL38 Mullard (CV450) ESW891 Ediswan E1191 MOV (CVI2)EL38M Mullard ESW892 Ediswan El192 MOV (CVI501)EL41 Mullard ESW3000 Ediswan E1198 MOV (CV38)EL41 Philips CV3889 ESW5000 Ediswan (CV2686) E1199 MOV CVl40SEL42 Mullard ESl5 Ediswan CV3853 El209 MOV (CV7)

EIA2 Philips CV3890 ES30 Ediswan El228 MOV CV3EL50 MulIard CV2941 ES75 Ediswan

, Cv !ittlbrj El229 MOV CV4EL70 Mullard (CV47I) ES75H Ediswan~fc El231 MOV (CV52)EL80 Mullard ES85 Ediswan (CV25) El232 MOV (CV92)

Philips ES204A Ediswan CV2563 El235 MOV (CV29)EL81 Mullatd (CV2721)

Philips ES204X Ediswan El236 MOV (CV69)ES207 Ediswan CV3850 El242 MOV (CVI510)

EL83 Philips CV2726 ES208 Ediswan El248 MOV (CV8)Mullard ES250M Ediswan (CVI618) E1255 MOV (CV40)

EL84 Mullard CV2975 ES253 Ediswan CV3851 El256 MOV (CV42)EL85 Mullard CV3526EL90 Mullard (CVI862) ES275 Ediswan El266 MOV (CVI5)EL91 Mullard (CV136) ES357 Ediswan (CV27) El267 MOV (CV4l)

ES450 Ediswan (CV1207) E1271 MOV (CV57)EM1 Mullard ES450X Ediswan CVl553 El273 MOV (CV58)

Tungsram ES833 Ediswan (CV63S) El287 MOV (CV23)EM4 Mullard CV1434

Tungsram ES1500 Ediswan (CV1614) El289 MOV (CV1148)EM31 Mullard (CV1077) ES1500A Ediswan (CVI614) El297 MOV (CV5)EM34 Mullard (CV394) ESI500A/I Ediswan E1320 MOV (CVSt)EM35 Mullard GCVI103») _ ESl500B Ediswan E1323 MOV (CV63)~r1~o cv';).~4-9 ES1500B/l Ediswan E1325 MOV (CV56)EM80 MulIard (\l13S-2-EN30 Ferranti ES1500C Ediswan El326 MOV (CV69)EN31 MulIard ES1500C/1 Ediswan El331 MOV ~CV151O)EN32 MulIard (CV2253) ET1 MOV

c...J 4-5"1El335 MOV CV61)

EN70 MulIard (CV47~ ET3 MOV E1337 MOV (CV78)t::M11 n vu.i)A l7 cvS-O 5'" ET30 Ediswan (CV1030) El342 MOV (CV64)EN91 MulIard (CV797)EQ80 MulIard EY51 Mullard (CV426) El355 MOV (CVI343)

Philips EY70 Mullard (CV473) El359 MOV (CV76)ESA891 Ediswan CV2688 EY80 Mullard El362 MOV (CV126)ESA892 Ediswan CV701 EY84 Mullard (CV2235) El365 MOV (CVI14)ESA892C Ediswan CV904 EY91 Mullard (CVl35) E1368 MOV (CV90)

ESA1500 Ediswan EZ22 MulIard (CV346) El371 MOV (CVI05)ESA2500 Ediswan EZ35 Mullard (CV574) E1373 MOV (CV99)ESA5000 Ediswan (CV2687) Tungsram El379 MOV (CV79)ESG250 Ediswan (CV1031) EZ40 Mullard El380 MOV (CV89)ESP450 Ediswan (CV1506) EZ40 Philips CV3891 E1411 MOV (CV153)

EZ41 MullardESU74 Ediswan (CV74) E1415 MOV (CVI IS)ESU75 Ediswan CV2945 EZ80 Mullard Cvl:s-'3'J' E1416 MOV (CV28l)ESU76 Ediswan CV2943 Philips E1417 MOV (CV117)ESU77 Ediswan EZ81 Mullard C V'J°72 E1419 MOV (CY154)ESUl50 Ediswan CY2946 EZ90 Mullard (CV493) E1423 MOY CY406

E80F Philips CY2729ESU200 Ediswan (CV5) ElT MUllard ell5"lob E1429 MOY (CV79)ESU206 Ediswan E1436 GEC (CY188)ESU208 Ediswan (CV1260) El32 MOV (CV1643) E1453 MOV (CY1646)ESU300 Ediswan CY2947 E133 MOV (CV1645) E1457 MOY (CV257)ESU450 Ediswan (CV1259) 'E406N Philips E1458 MOV (CV 178)

E424 MOYESU575 Ediswan ~t}~ Philips (CV1282) E1459 MOV (CV174)ESU676 Ediswan Cl! 5"O~'t- E1465 MOV (CV236)ESU751 Ediswan E960 MOV (CV105 ) E1468 MOV (CV172)ESU866 Ediswan (CV32) E960T MOV (CV1098) E1474 MOV (CY78)ESU872 Ediswan CV642 E1024 MOV (CV11 14) E1481 MOV (CYl92)

E1046 MOV (CV1090)E1097 MOV (CVl111) E1485 MOV (CV807)

ESU1500 Ediswan CY2944 E1487 MOV (CV208)ESU1500AX Ediswan E1132 MOV (CVll11) E1494 MOV (CV191)ESU8008 Ediswan E1143 MOV (CVIS77) E1495 MOV (CV259)ESW204 Ediswan E1148 MOV (CV6) E1496 MOV (CY240)ESW205 Ediswan E1148 Hytron CV2920

E1155 MOV (CV44)E1497 MOV (CV215)

ESW206 Ediswan E1161 MOV (CVI253)E1511 MOV {(CV355)

ESW207 Ediswan E1164 MOV (CV109l) (CV356)ESW208 Ediswan E1180 MOV (CV1077) E1516 MOV (CY221)ESW350 Ediswan E1189 MOV (CV1255) E1524 MOV (CV338)ESW501 Ediswan (CV1621) E1190 MOV (CV55) E1527 MOY (CY290)

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Type Maker or CYNo. Type Maker or CYNo. Type Maker or CYNo.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearest


E1531 MOV (CV214) FW Philips GL464 USA CV3604E1532 MOV (CV1644) FWl Philips GL464A USA CV688E1541 MaV (CV1716) FW2 Philips GL471A USA CV3586E1563 MaV (CV1863) FW3 Philips GL532 USA CV2647E1591 MOV (CV18l) FW4/500 Mullard (CV1264) GL532A USA CV2647

t.{I.-UU 054 CV("~E1599 MOV (CV273) FW4/800 Mullard (CV31) GL592 USA CV190E1606 MOV (CV278) FX215 EEV (CV2203) GL806 USA CV2668E1633 MOV (CV456) FX219 EEV (CV2520) GL868 USA (CV2680)E1647 MOV (CV288) F2 Siemens (CV2338) GL889R USA (CV2687)E1648 MOV (CVI35) F123A USA CV2949 GL889RA

~(CV2687)

C]"~ik C:-V SlotE1659 MOV (CV453) F129B USA CV2950 GL892 USA CV904E1706 MOV (CV437) F328A Federal CV734 GL918 USA (CV2692)El714 MOV (CV408) F353 } Federal CV642

GL2050 USA CV2565E1736 MOV F353A GL8020 USA CV2967E1769 MOV (CV397) F366A Federal (CV32) GL8023 USA CV933

<Z-:f'>ft /!;(if C\l~loc.

E1824 MOV F869B USA CV2723 GM1B Cintel (CV2149)E1860 MaV (CV240) F872A} USA CV642

GM2 GECE1894 MOV F872B GM4 GEC (CV2138)E1935 MOV (CV415) F892R Federal CV904 GM5 Cintel (CV411)E1938 MOV (CV493) F/6063 STC (CV4001) GM5B Cintel (CV2148)

47~tf. /Iff;.( cds.'/a2..E1954 MOV (CV25) Fj6064 STC (CV4002) GRI0A EricssonE1955 MOV (CV797) GA5A USA CV2647 GSlOB EricssonE1956 MOV (CV261) GClOA Ericsson (CV2199) GSlOC Ericsson (CV2325)E1959 MOV (CV495) GCI0B Ericsson GS12C EricssonE1996 MOV (CV436) GClOB/S Ericsson (CV2271) GS16S0 Cintel (CV2694)

(80-110)E2004 MOV (CV2115) GCI0D EricssonE2016 MOV (CV1758) GCI0M Ericsson GS16S0 CintelE2018 MaV (CV454) GClO/4B Ericsson {\f f7?>9 (160)E2038 MOV GC12j4B Ericsson GS16WB CintelE2085 MOV GDT4 Cossor GS16 (160) Cintel (CV248)

GS16 Cintel (CVI473)E2095 MOV (CV471) GDT4B Cossor (CV1141) (80-110)E2133 MOV (CV2276) GDT4C Cossor GS18 Cintel (CV242)E2134 MOV (CV2179) GD86W Ericsson (CV2321)E2163 MaV (CV491) GE Pt. No. GEC CV2976 GS26 Cintel (CV1432)E2164 MOV (CV492) NE2 GS44X Cintel CVI913

GETypeT2 GEC CV7439..4~ GS44Y CintelE2221 MOV (CV2277) G£ I(J' 1J~/-I CV~ GS46 Cintel CV584E4103jB/4 GEC (CVI522) GE Type T4-! GEC CV744 GS56 CintelE4lO3jE/4 GEC (CV2205) GET1 GEC

GS47X Cintel (CV405)E4205jB/7 GEC (CVI588) GEXOO GECE4205jC/7 GEC (CV1525) GEX33 GEC GS1l6A Cintel

GEX34 GEC c cl ~-otj..7 GS116AM CintelE4205jE/7 GEC L}7/p V!)11 GS1l8 Cintel CV1801E4205/M/7 GEC GEX35 GEC (CV442) GS1l8TA CintelE4412jBj9 GEC (CV1587) GEX36 GEC GS146 CintelE4412jCj9 GEC (CV2301) GEX44jl GEC CV2692~4412jEj9 GEC (CVI529) GEX45j1 GEC (CV425) GTE175M Ericsson

GEX54 GEC GTR95MjS Ericsson (CV286)E4412jMj9 GEC (CVI521) Orr;-Yfj( 4£c.. ~v ~/()'f- GTRI50M/S Ericsson (CV287)E4504fBf16' GEC (CV1385) GEX5 /3 GEe CV 16f; GTl MOV CV2969E4504jCf16 GEC (CV252) GEX54j4 GEC GTIA MOV (CV1143)E4504jEj16 GEC (CV1391) GEX54j5 GECE4504jMj16 GEe (CV966) GEX55jl GEC GTIB MOV

GEX56 GEC GTIC MOV (CVl128)FA13 USA CV2952 GT1E MOV CV530FA14 USA CV2953 GEX64 GEC (CV2310) GT11 (CV435)FA15 USA (CV298) GEX64j3 GEC GU1 MOV (CV1262)FC2 Mullard (CV1043) GEX64j4 GECFC2A Mullard CV2954 GEX64j5 GEC GU5 MOV (CV1072)

GEX64j6 GEC GU7 MOV CV2973GU8 MOV (CV1628)FC4 Mullard

GEX64j9 GUll MOV CV532FC13 Mullard GECFC13C Mullard CV2956 GEX64jO GEC CU14 MOVFC141 Mazda GEX66 GEC GU20 MaV CV1435FG17 USA CV2957 GEX99 GEC GU21 MOV (CV5)GF-Y..::1.Q2 DD"'(7 rt'lT"nn"l

&iriCm.' cvi"~ GU50 MOV (CVlO72)~IL I cv iOti '

GX402 EEV (CV2902)FG27A USA CV2958 L20 USA CV 986FG67 USA CV742 GL446 USA CV3725 GZ30 MullardFP54 USA CV2960 GL446A USA CV932 GZ32 MulIard CV593FT4 Ferranti GL446B USA CV687 G1j235G STC CV3524FVD7 Ferranti (CV404) GL455 USA CV2789 G1j370K STC

G1j371K STC (CV2224)

22390 47 D2

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Type Maker or CV No. Type Maker or CV No. Type Maker or cv No.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearest


G5H 20th CE (CV2233) HlA2DD Mazda KC1 PhilipsGlOH 20th CE (CV2173) HL63 KC4 PhilipsGlOj240E STC HL92 Mullard (CV1959) TungsramGlOj241E STC (CV2223) HL133 Mazda CV2998 KDD1 PhilipsG24E 20th CE (CV2148) HL133jPD Mazda CV2999 KD60 Ferranti

KF3 Phil~·CV ;lOtG24H 20th CE (CV2147) HL210 Mazda k~k7

K"I:!/Z AJfiG50jlG STC (CV2208) MOV CV3500 K 4 PhilipsG60E 20th CE (CV2149) HL210A MOV CV1303 KF35 MullardG75jlD STC HL610 MOV CV3501 KG7 GECG75j2D STC (CV3798) HL1320 Mazda CV3502 KHl Philips

HN309 MOV TungsramG105jlD STC (CV686) MWTG120jlB STC (CV438) HP2 Ferranti (CV1032) KK2 Philips CV3516 (0)G150jlA STC (CV75) HP6 Tungsram (CV138)G150j2D STC (CV413) ~~ HP2I0 Tungsram (CV1322) KK32 MullardG150j3D STC (CV216) HP21I Tungsram KLL32 Mullard

HP211c Tungsram KLl PhilipsGI80j2M STC (CV395) MWTG210jlC STC (CV212) HP215 Hivac (CV1322) KL2 PhilipsG240j2D STC (CV2174) HP415 Tungsram (CV1169) KL35 MullardG400/1K STC (CV2194) HP4101 Tungsram (CVI124)G445B (CVI65I) HP410Ic Tungsram (CVI282) KRN2 EMI (CV87)

HP4106 Tungsram (CV1169) KRN3 EMI (CVI58)G2018 Tungsram KR3 EMI (CV2I7)G2080 Tungsram HP4115 Tungsram (CV1169) (CV218)HAD Ferranti (CVI419) HRl Ferranti KR6/1 EMI (CV116)HAI MOV (CVII71) HR2 Ferranti (CV26l) KR6/2 EMI (CV237)HA2 MOV (CVI059) HR3 Ferranti

HR4 Ferranti KR6/3 EMI (CV238)HBC90 Mullard KR6/4 EMI (CV272)HDI4 MOV (CVI818) HR6 Ferranti KS9-20 Mullard (CVI795)HD24 MOV CV2985 HR7 Ferranti (CV404) KS9-20A· Mullard (CV2792)HD203A Taylor CV2986 HR2lO Tungsram (CVI673) KTW6I MOV (CV11OO)HF93 Mullard (CVI928) HT415 USA CV3540

\HVR2 Mullard (CVI134) KTW62 MOV . (CV11OO)HFlOO Amperex CV2987 KTW63 MOV (CVII95)HF130 Amperex CV638 HVR2A Mullard KTW73 MOV (CVI056)HF200 Amperex CV2988 HV12/8I4 USA KTW73M MOV CV3527.HF300 Amperex CV693 HV18 USA CV2988 KTW74M MOV (CV9I8)HK24 USA CV941 HY51B Hytron (CV702)t4.J) 2t>If.. It vsa c tf.,a"("1 HY61 Hytron . (CVI24) KTZ4I MOV CV3529HK24G USA CV789 KTZ63 MOV (CV1074)HK54 USA CV707 HY75 Hytron CV751 KTZ73M MOV CV3530HK90 Mullard HY90 Mullard KT2 MOV (CV1118)HK257 USA CV824 HY114B Hytron CV3505 KT8 ,MOV (CV1079)HK354E USA CV2989 HY6I5 Hytron CV3506

H2 MOV CV2977 KT8c MOV (CV1079)HLAD STC Mazda KT24 MOV (CV1334)HLA2 STC (CV1678) KT30 (0) MOV CV35I9 (0)HLBI STC (CVI021) H2D Ferranti (CV1044) KT31 (0) MOV CV3520HLDDj1320 Mazda CV3503 H4D Ferranti KT32 MOV (CVI287)HL2 Mazda HI2 MOV CV2978

MOV (CVI673) H30 MOV CV2979 KT33C MOV (CVI503)Tungsram H42 MOV (CV1182) KT36 MOVFerranti KT38 (CVI576)

H45 USA (CV372) KT41 MOV (CVll81)H63 MOV (CV1073) KT42 MOV (CV1174)

HL2 Met MWT CV2991 H210 MOV (CVI673)HL2K MOV (CV1050) HivacHL2S Ttingsram H410 MOV CV2981 KT44 MOV (CV1577)HlA Tungsram (CV1173) H610 MOV CV2982 KT44T MOV (CVI576)HlAX Tungsram (CVI037)

(CV1039)KT45 MOV CV1825

IFWI Dario KT61 MOV CVl438IW2 Mullard KT63 MOV (CV1186)

HlAG Tungsram IW2A MullardHLS MOV IW3 Mullard (CV1039)HL13 Mullard IW3A Mullard

C v' I~"KT66 MOV (CVI075)

Hivac J-P~' 16 KT67 MOV (CV437)Tungsram IW Mullard (CVI039) KT71 MOV

HL13C Mullard (CV1109) IW4/300 Mullard KT76 MOVHL21 MOV (CV1303) IW4/500 Mullard (CV1039) KT81 MOV (CV885)

JP9-7 Mullard (CV3676)JP9-7A Mullard (CV370)

HL21DD Mazda (CVI044) KTI01 MOVHL23 Mazda (CV1130) JP9-15 Mullard c.ti-;qq"7 KU25 USA, CV2993HL23DD Mazda CV2995 KBCl Philips KU~4 USA CV3875HlAl Mazda (CV24) KBC32 Mullard K3 FerrantiHlAIDD Mazda CV2996 KB2 Mullard CV3515 K3A Ferranti (CV41O)

KCF30 Mullard

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K7RF4 RCA CV1808 MElO05 Mullard (CV354) MT6K300 EEV

LvJ....c' (ME1100 Mullard (CV1795) MT7B MOV

K301 EEV ME1101 MulIard MT9 MOVK302 EEV (CV2164) 'ME1200 Mullard MT9A MOVK303 EEV ME1201 Mullard MT9F MOV CV1439

K304 EEV (Cl/fLUY ME1202 Mullard MT9L MOV CV1440K305 EEV ME1400 Mullard (CV432) MT11SW MOV CV3563K307 EEV CV1871~ ME1401 Mullard (C:Y1;~ MT12 MOV CV3564K308 EEV LC.I/~;z.. ME1402 Mullard MT12A MOV CV1441K309 EEV ME1403 Mullard. CII ;:~¥ MT13 ·MOV (CV1614)

K322 EEV (CV2791) ME1500 Mullard (CV474) MT14 MOV CV1442K324 EEV (CV2304) ME1501 MulIard (CV2253) MTl6 MOV (CVl030)K1051 USA CV2849 MEl502 Mullard (CV1128) MT17 Mullard (CV2957)K1105P2 USA CV3736 MEl503 MulIard (CVl787) MT57 MullardK8140824 USA CV3514 MEl504 MulIard MTl05 Mullard

LD210 Tungsram CV502 MFll-15 Mullard(G1tt7TJ,yr;~)- MT5544 Mulhird (CV2210)

LG210 Tungsram (CVl021) MF13-1 MulIard ,t1! MT5545 Mullard (CV2215)LL2 Tungsram (CVI02l) MF3l-22 MulIard MUI CV3567LL2S Tungsram MF31-55 MulIard (CV429) MU2 Mazda CV1459LL4 Tungsram MF41-l5 Mullard MUl2 MOV (CV1039)

LN309 MOV MHD4 MOV CV 3546 MU12/14 MOV (CV1039)LP2 MOV CV548 MHLD6 MOV (CVl10l) MU25 EdiswanLP2 Ferranti (CV1023) MHL4 MOV (CV1038) MU4250 Cossor (CVlO72)LP4 Ferranti (CV1168) MHT4 (CV2955) MU4600 Cossor

MOV MH4 MOV (CV1037) MVSG Cossor (CV11 65)LP220 Tungsram (CV11 66)

MH4 (Met.) MOV (CV399) MVS Pen Cossor CV3571LS5 MOV (CV1637) MH41 MOV (CV1505) MVS Pen Cossor (CV11 69)LS5A MOV (CV1650) MH206 (0) Tungsram MVS Pen B Cossor CV3572LS5B MOV (CV2846) MHl118 Tungsram MV6-5 PhiIips CV1976LS5X MOV (CVl667) MH4105/71 Tungsram MW6-2 MulIard e. J 17"\,LS6A MOV CV354l

MKT4 MOV (CV1683) MW13-35 MullardLS7 MOV (CV1660) ML4 MOV (CV1732) MW22-14 MullardLS7B MOV ML6 MOV (CV1105) MW22-14c MullardLS8 MOV (CV1656) ML5667 MachIett (CV2687) MW22-16 MullardLS8A MOV (CV1676) MM4V Mullard (CVl165) MW22-17 MullardLS9B MOV (CV1658)

MW22-18 MullardLS408A STC CV3536 MP/PEN Cossor (CV1683) MW22-22 Mullard Cv ~~q1LS532 , STC CV3542 MPS/lA EEV MW31-14c MullardLS650 STC (CV391) MPT4 MOV (CV1174) MW3l-16 MuIIardLS722 STC MPT4K MOV CV3552 MW3l-17 MuIIardLS731 STC (CV273) MPT42 MOV CV3554

MW31-18 MullardMW31-39 MuIIard

L2 Mazda CV3531 MRl MOV MW36-22 MullardFerranti Hivac MW41-1 MuIIardL2DD Mazda MR4 MOV (CV161l) MW100 Cossor (CV25) .U Ferranti MR6 MOVL9 Siemens (CV328) MR7A MOV MXl EMI (CV1515)L21 MOV CV3532 MRlO MOV (CV34) MX2 EMl (CV418)

MX40 MOV CV3576MX52 BTH (CV306)

L21DD Mazda (CV1308) MR75 Ediswan (CV1142) MX57 BTH (CV209)L22 Mazda MR300 Ediswan CV3557L22DD ~ Mazda CV3533 MR300E Ediswan CV3558 MXI03 MuIIard (CV2150~L29 : USA MSG/LA (0) Cossor (CV1677) MX105 MuIIard (CV2151L30 MOV CV3534 MS Pen Cossor CV3561 MX107 I MuIIard: (CV2l52)i-~tJ f.I.O °S4- ell~ffl MXI08 . Mullard (CV2153)t.-. "!>oq.' U5,1- Ctl~O'1C1 MZ05-20 Mullard CV3573L63 i

MOV (CV1067) MS Pen Cos&or . (CVl124)L77 MOV (CV133) (clear)L210 MOV (CV102l) MS Pen ' Cossor (CV244) MZ05-60 MulIard' (CV1206)Mazda (5 pin) MZl-70 MuIIard' (CV25)Hivac MS/Pen B Cossor (CVl125) MZl-75

:MuIIard (CV444)

L410 MOV (CV11 52) MS/Pen/T Cossor (CVl129) MZl-76 MuIIard CV3574L600 USA CV3537 MSP4 MOV I (CV1282) MZl-l00 Mullard (CV1219)

L610 MOV CV3538 MSP41 MOV CV3562 MZ2-200 MuIIard (CV200)MAG2 MOV MS4 MOV (CV11 64) MZ2-250 MuIIardME41 Mazda CV3565 MS4B MOV CV3553 M2H (CV2886)ME91 Mazda MT2 MOV M6 20th CE (CV2145)ME100l MuIIard' (CV273) MT4 MOV (CV161O) Ml25H Cossor (CVl77)

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M500 EEV (CV353) NR5 AD NR78A AD (CV1932)M501 EEV (CV76) NR7 AD NR79 AD CV1192M502 EEV ;u.~t-(CV~) NR8 AD NR81 AD CV1941M502A EEV cv,,~ NR12A AD NR82 AD CV1193M503 EEV CV186 NR13 AD NR83 AD CV1074~ f."l,'t BW' C'" S-"\fM504 EEV NR13A AD NR84 AD CV1194M505 EEV CV1747 NR14 AD CV1150 NR85 AD CVl186M506 EEV' C(/~ NR15 AD CVl151 NR86 AD eV1195M507 EEV (CV69) NR15A AD eV1152 NR87 AD eVl196M508 EEV (CV370) NR16 AD CV1153 NR88 AD eV1197

M509 EEV cv"Ji."7b NR16A AD CVIl54 NR89 AD (CV35)M510 EEV CV1827 NR17 AD CV1155 NR94 AD CVl198M511 EEV \ NR18 AD CVl156 NR95' AD CV1287M512 EEV CV1828 NR19 AD eVl157 NSPT FerrantiM513 EEV CV3528 NR22 AD CVIl58 NSPl Ferranti (CV220)

M518 EEV C rI,/1 NR23 AD CVIl59 NSP1E FerrantiM519 EEV all qtt NR26 AD CV1038 NSP2 Ferranti (CV2296)M521 EEV NR27 AD CVll60 NSl AD CVI069M8079 Mullard (CV4025) NR27A AD CV1161 NS2 AD CVIl99M8081 MulIard (CV4031) NR28 AD CVI019 NS3 AD eV1200

M8082 MulIard NR31 AD CV399 NS4 AD eV1201M8083 Mullard (CV4014) NR35 AD CV1163 NS5 AD CV1202M8100 Mullard (CV4010) NR37 AD CV1164 NTl AD CV1203NC1 AD CV950 NR38 AD eV1165 NT2 ADNC2 AD CV951 NR39 AD eVIl 18 NT2 Hivac (CV2213)

NC3 AD CV952 NR40 AD (CVI237) NT3 AD CV1292NC4 AD eV953 NR41 AD CVI083 NT4A AD CV1204NC5 AD CV954 NR42 AD CV1166 NT5 ADNC6 AD CV955 NR43 AD CV1167 NT8 ADNC7 AD CV956 NR44 AD CV1168 NT9 AD

NC8 AD CV957 NR45 AD CVIl69 NTI0 AD eV1294NC9 AD CV958 NR46 AD CVIl70 NT13 AD CV2788NCI0 AD CV959 NR47 AD ev1040 NT14 ADNCll AD (CV960) NR48 AD CVI055 NT15 ADNC12 AD CV960 NR49 AD CV1056 NT16 AD

NC13 AD CV961 NR50 AD CVIl71 NT17 AD CV1205NC13A AD CV987 NR51 AD CVIl72 NT18 AD eV1206NC14 AD CV962 NR52 AD CV1173 NT19 AD eV1207NC15 AD CV1596 NR53 AD CV1174 NT20 AD eV1208NC16 AD CV964 NR54 AD eVIl75 NT22A AD

NC17 AD CV965 NR54A AD CVIl76 NT22B AD CV1209NC18 AD CV966 NR55 AD CVIl09 NT22C AD CV1210NC19 AD CV967 NR56 AD CV1178 NT23 ADNC20 AD CV989 NR57 AD CVIl79 NT23B AD CV1211ND2 AD NR58 AD CVIl80 NT23D AD eV1212

ND3 AD NR59 AD CVIl81 NT24 AD eV1213NE2 USA CV2976 NR60 AD CVIl82 NT26 ADNE5 Ediswan NR61 AD CV1183 NT27 ADNE16 GE/USA CV651 NR62 AD CV1184 NT28 ADNE17 Ediswan (CV359) NR63 AD NT30 AD CV1214

NE18 Ediswan (CV360) NR64 AD CVIlOO NT31 AD CVl~15NGTl AD CVIl41 NR65 AD CV1282 NT32 ADNGT2 AD CV1128 NR66 AD CVIl87 NT32A ADNGT3 AD CVl142 NR67 AD CV1280 NT32B AD CV1216NGT4 AD CV1143 NR68 AD CV587 NT33 AD CV1217

NGT5 AD CV1144 NR69 AD eVI103 NT35 AD CV1218NGT6 AD CV1145 NR70 AD CVl124 NT36 AD CV1219NGT6A AD CV1146 NR71 AD CV1129 NT37 I AD CV1220NGT7 AD CV1147 NR72 AD CV1188 NT38 AD CV1293NGT8 AD CV1148 NR73 AD CV1285 NT38A AD CV1221,NGT9 AD CV1149 NR74 AD CV1189 NT39 AD CV1222NHPl Ferranti (CV310) NR75 AD CVl190 NT40 AD CV1223NP90 USA CV3607 NR76 AD CV1191 NT41A AD CV1224NR3 AD NR77 AD CV1286 NT43 AD CV1225NR4c AD NR78 AD CV581 NT45 AD CV1295

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NT45A AD CV1226 NU22B AD CV1269 Pen DD2530 MazdaNT46R AD CV1227 NU22C AD CV1270 Pen DD4020 MazdaNT48 AD CV1228 NU23 AD CV127l Pen 4DD Mullard CV5l9NT52 AD CV1229 NU24 AD CV1272 Pen4VA Mullard (CVl174)NT54 AD CV1230 NU25 AD CV1273 Pen l3C Mullard (CV889)

NT55 AD NU26 AD CV1274 Pen 25 _Mazda (CV65)NT57 AD CV123l NU26A AD Pen 36A (CV1672)NT57A AD CV1232 NU26B AD Pen 36C Mullard (CV1672)NT57C AD NU26C CV1275 Pen40DD MullardNT57D AD CV1233 NU28 AD CV1276 Pen 44 Mazda CV3630

NT57T AD CV1234 NU29 AD CV1277 Pen 45 Mazda CVl407NT58 AD CV1288 NU30 AD CV1278 Pen 45DD Mazda CV3631NT58A AD CV1235 NU3l AD CV1279 Pen 46 Mazda (CV1127)NT59 AD NU33 AD CV1290 Pen 220 Mazda (CV1118)NT59A AD CV1236 NU33A AD CV129l Pen 220A Mazda (CVlO5l)

NT62 AD ~ CVl237 NU34 AD CV1134 Pen 231 Mazda CV3633NT62A AD CV1238 NU40T2 Nat. Union (CV1076) Pen 383 Mazda CVl456NT63 AD NU75H USA CV751 Pen 384 MazdaNT63A AD CV1239 NUl14B USA CV3505 Pen 428 Mullard CV3634NT65 AD (CV1240) NU200 USA CV2988 Pen 453DD Mazda

NT65A , AD CV1240 NU6l5 USA CV3506 Pen 1340 Mazda CV3635NT68 AD CV124l N14 MOV (CV1803) Pen 1346 CV3636NT68A AD CV1242 N16 MOV (CV8l9) PE7B Mazda CV3624NT69 AD CV1243 N17 MOV (CV820) PE8 -Mazda CV3625NT75 AD CV1244 N18 MOV (CV8l8) PE50 Mazda

BTHNT77A AD (CV50) N19 MOVNT77B AD (CV50) N37 MOV PE5l BTHNT78 AD N4l (0) MOV (CV118l) MazdaNT78A AD CV1245 N43 (0) MOV (CV1675) PE52 MazdaNT82 AD CV1246 N77 MOV (CV136) PJ8 USA CV3640 (0)

PJ23 USA (CV2680)(0)NT83 AD CV1247 N78 MOV CV371 1 PK150 EMI (CV150)NT84 AD CV1248 Nl08 MOVNT86 AD CVl249 N329 MOV PL33 MullardNT87 AD CV1250 N339 MOV PL38 MullardNT88 AD N727 MOV (CV1862) PL38M Mullard

PL81 Mullard c-v fer7?

NT90 AD CV125l OC2.5 Mullard (CVI607) PL82 MullardNT92 AD CV1252 OClO MullardNT93 AD CV1253 OCll Mullard PL83 Mullard

- NT97 AD CV1254 OC12 Mullard PL522 Philips (CV2520)NT98 AD CV1255 OC50,/ Mullard PMlA Mullard CV2977

t»'t b-7 I-f(/u~l) C! i/;';10<,- PMlHF Mullard (CV1673)NT98A AD CV1491 OC5l Mullard P~JHL Mullard CV364lNT98B AD CV1492 OMI Cossor (CV1402)NT98C AD CV1493 OM3 Cossor (CVl054) PMlLF Mullard CV3642NT98D AD CV1494 OM4 Cossor (CVl055) PM2 Mullard (CV10l9)NT99 AD CV1256 OM5 Cossor (CVl056) PM2A Mullard CV3643

PM2B Mullard (CVl032)NTlOO AD CV1257 OM6 Cossor (CV1053) PM2BA Mullard (€Vl163)NUl USA (CV2680) OM8 CossorNUl AD CV1258 OM9 Cossor (CVlO52) PM2DL MullardNU2 AD eV1259 OM10 Cossor (CV158l) PM2DX Mullard CV3645NU3 AD CVl064 OMlO PM2HL Mullard (CV1050)

(unmet) Cossor (CV158l) PM3 Mullard (eVl15DNU4 AD CV1260 PM4DX Mullard (CV1152)NU5 AD CV126l PAl STC (CV1689)NU7 AD CV1262 PA20 Mazda PM12 Mullard (CVlO18)NU8 AD eV1263 PA40 Mazda CV3623 PM12A Mullard (CVlO18)NUl2 AD eV1264 PB1 STC PM12M Mullard (CVl041)

PCA2l MOV PM12V Mullard (CV3l9)NU13 AD CV1265 PM14 Mullard (CVl159)NUl3A AD CV1266 PCC84 MullardNU15 AD CV1267 PCF80 Mullard PM22 Mullard CV3649NU17 AD CVl039 PD22A Mullard (CVl163) PM22A Mullard eV3647NU17S AD CV1296 PD220 Mazda (CVl032) PM22D Mullard CV3578

PD220A Mazda (CV1696) PM24A Mullard (CV1167)PM24D Mullard (CV1237)

NU18 -AD CV11 13NU20 USA (CV1474) PenAl STC PM24E Mullard CV3648NU20 AD CV1268 PenA4 Mullard CV3638 PM24M MullardNU2l AD PenB1 STC (CV1118) PM202 Mullard (CV185)NU22A AD PenB4 Mullard CV3626 PM254 Mullard (CV1153)

Pen DD61 Philco PM256 Mullard (CV1208)

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Type Maker or CV No. Type Maker or cv No. Type Maker or cv No.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearestin brackets) in brackets) in brackets)

PP2S Tungsram P220A Mazda (CV1023) QV05-25 Mullard (CV124)PP3/250 Mazda (CV1168) P410 MOV CV3621 QV06-20 Mullard (CV3523)PP3/521 Mazda P415 MOV (CV11 54) QVl-150 Mullard (CV2519)PP5/400 Mazda (CV1040) P425 Mazda (CV11 54) QVl-150A Mullard (CV2519)PP13A Tungsram P495 Tungsram (CV1181) QY2-100 Mullard (CV26)

PP13S Tungsram P535/1E STC (CV398) QY3-125 Mullard (CV2130)PP35 Tungsram P552/1E STC (CV427) QY4-250 Mullard (CV2131)PP222 Tungsram (CV11 18) P610 MOV CV3622 QY5-3000A MullardPP225 Tungsram P625 MOV (CV1208) REL5 Research (CV1098)PP230 Tungsram QA2400 MOV (CV4015) Ent.

REL8D Research CV733PP3521 Mazda QA2401 MOV Ent.PTA Ferranti (CV889) QA2402 MOVPT2 MOV (CV1118) QA2403 MOV (CV4014) REL21 Research (CV1507)

Ferranti QA2404 MOV (CV4025) Ent.PT4 MOV (CVl181) QA2405 MOV REL25 Research CV914

Ferranti Ent.PT5 MOV CV3652 QA2406 MOV (CV4024) REL38K • Research

QA24Q7 MOV (CV4005) Ent.PT5E MOV CV3579 QA2408 MOV REL64 Research CV507PT6 MOV CV3653 QF196 USA (CV1078) Ent.PT11 MOV CV3654 QK26 Raytheon CV1768 RGl-125 Mullard (CV1263)PT15 MOV (CV1104) 6i1l >rJ' V~i'r cvr;o~PT25 MOV (CV1046) QK221 USA CV3902 RGl-240 Mullard (CV1626)

QK283 USA CV3685 RGl-250 Mullard CV3667PT25H MOV (CV1046) QK284 USA CV3686 RG3-250 Mullard (CV1625)PT425 MOV CV3656 QK338 USA CV3903 RG3-250A Mullard (CV32)PT425X MOV . (CV1167) QK353 USA CV3737 RG3-1250 MulIard (CV1629)PVX2800 Tungsram Gi~'*7 U5fr <2i/ ~i1PV05-15 Mullard CV3657 QMG159 USA (CV2874) RG3-1250A Mullard (CV5)

QPT2 Ferranti (CV1035) RG4-1000 Mullard CV3670PVl-35 Mullard CV3658 QP21 MOV (CV1035) RG5-12G MullardPV4 Tungsram QP22B Mullard (CV1035) RG5-500 Mullard (CV1349)PV4S Tungsram QP25 Mazda CV556 RG250-1000 TungsramPV25 TungsramPV475 Tungsram QP230 Mazda ,(CV1035) RG250-3000 . Tungsram

QP250 Mazda RG1000- TungsramPV495 Tungsram (CV1443) QQE03-12 Philips CV2798 3000PX4 MOV (CV11 68) QQE06-40 Philips (CV424) RKR47 USA CV3683PX5 Hivac (CVI040) QQV03-1O Mullard (CV2798) RKR72 Raytheon (CV709)PX25 MOV (CVI040) RKR73 Raytheon CV2543PX41 Hivac (CV11 68) QQV03-20 Mullard (CV2799)

RaytheonQQV03-20A Mullard (CV2799) RK20A CV704PX250 Tungsram QQV04-20 Mullard (CV2663) RK28 Raytheon CV3672PXl120 Tungsraryl QQV06-40 Mullard (CV424) RK28A Raytheon CV3673PX2100 Tungsram QQV06-40A Mullard (CV2797) RK30 Raytheon CV2657PX2450 Tungsram RK31 Raytheon CV3674PX2470 Tungsram QQV07-40 Mullard (CV2666) RK33 Raytheon CV875q9-~04-15 Mullard CV1838PX2500 Tungsram " RK34 Raytheon (CV18)

~rt:7f7-V bbY (CV284) RK38 Raytheon CV2591PY3-600 Mullard (CV1373) QS75j20 EEVPY31 Mullard QS75j60 EEV (CV434) RK44 Raytheon CV637PY80 Mullard RK47 Raytheon CV3677•PY81 MulIard QS83j3 EEV (CV449) RK48A Raytheon CV690QS92jlO EEV (CV188)PY82 Mullard QS95/1O ' EEV (CV286) RK49 Raytheon CV3679PY83 STC Q8ffi5-f4§-!-EBV--t€\fffl1' RK57 Raytheon CV625PZl-35 Mullard (CV1240) QSI08/45 EEV (CV422) RK58 Raytheon CV638PZl-75 MillIard (CV1221) RK60 Raytheon CV3680PZ30 MulIard QS150j15 EEV ~SX~~Z~ RK62 Raytheon CV3681QS1 <:.r\/'ll\ ""''''''''

QSlS0/40 EEV (CV2i6) RK63 Raytheon CV2589P2 MOV (CV1246) QS150/45 EEV (CV395) RK6112 EMI (CV2116)P4 Ferranti QS1200 EEV (CV2225) RL7 Mullard (CV11 36)P8 MOV RL7 Research (CV92)PI2/250 Tungsram (CV1168) Ent.P27/500 Tungsram (CV1040) QS1201 EEV

QS1202 EEV ,,;,v{.j.O~'2.. RL16 Mullard (CVl137)QS1203 EEV CI/ /.fcf"1" RL18 Mullard (CV1197)

P41 Mazda CV1408 QS1204 EEV RL37 Mullard (CV66)P57 CV1466 QS1205 EEV (CV3798) RR3-250 MulIard (CV1835)P61 Mazda (CV1066) RR3-1250 Mullard (CV2518)P215 Mazda (CVlO19)

MOV QS1206 EEV (CV686) RT1 G.P.O. CV190 ,Tungsram QS1207 EEV . (CV1832) RV120/250 Tungsram (CV1064)Hivac QS1208 EEV (CV1833) RV120j350 TungsramP220 Hivac CV3620 QV03-12 Mullard (CV2129) (S). Mazda QVO~7 Mullard , (CV309) RV120/500 Tungsram

RB200-600 Tungsram

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Type Maker or CV No. Type Maker or CV No. Type Maker or CV No.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearestin brackets) in brackets) in brackets)

RX3-120 Mullard (CVI261) SP13C Mullard CV3704 S215A Mazda CV3696RX233 Raytheon CV3688 SP22 Mazda S215B Mazda (CVI018)RX233A Raytheon CV793 SP41 Mazda (CVI574) S215VM Mazda (CV1028)RX235 Raytheon CV709 SP42 Mazda (CV1336) S410 MOV (CVI159)RZI-150 Mullard CV3690 SP61 Mazda (CV1065) S610 MOV CV3698RZI-250 Mullard (CV2853) SP181 Mazda S625 MOV CV1317RI STC (CV1443) SP210 Mazda (CV1322) TABC1 TungsrarnR2 STC SP215 Mazda (CV1320) TABL1 TungsrarnR2/1O GEC . (CV97) SS1971 STC (CV1604) TAC2 TungsrarnR2/38 GEC (CV98) SS2018 (0) Tungsrarn TAF3 TungsrarnR3 STC (CV1039) S~"T"'AI"'A ""''''''''T 'r<" 7"'0 t\ ' TAF7 Tungsrarn~~

'CV1895R3/10 GEC (CV95) STV70/60 EEV TAL2 TungsrarnR3/16 GEC (CV96) STVj75/15/11 TAL3 TungsrarnR4 Ferranti (CV1796) STV150/200 MOV CV3709 (0) TAU TungsrarnR4A Ferranti (CV1064) STV280j40 MOV (CV1068) TCB2 TungsrarnR5V MOV STV280j80 MOV (CV1069) TCC2 TungsrarnRlO STC (CV261) STV280j80A MOV CV3712 TCF3 TungsrarnRl1 STC (CVl1l1) STl1 MOV TCF7 TungsrarnR12 STC (CV426) SU25 Cossor TCK1 TungsrarnR14 STC \ SU30 Cossor TCU TungsrarnR16 STC SU41 Cossor (CVl113) TCR1 GPO CV1?33R17 STC (CV2218) SU44 Cossor (CV261) TDD2A Mullard CV3726R18 STC (CV2235) SU45 Cossor (CV371) TDD4 Mullard CV3727R19 STC

,SU750 Cossor (CV128) TDD13C Mullard (CV1419)R42 Ferranti ' SU2130 Cossor TD03-5 Mullard (CV354)

R52 Fen:anti (CV1863) SU2150 Cossor TD03-10 (CV273)R612G US CV597 SU2150A Cossor (CV1290) TH2 Mullard CV1410R4410 RCA CV521 SU4150A Cossor (CVl134) TH4A ' Mullard (CVl194)R5559 EM1 SV2 GPO CV1731 TungsrarnR6010 EMI CV.z.H'-~SV3 GPO CV1070 TH4B Mullard (CVl194)

R6015 Ctlt.}>i1r TungsrarnEM1 SV2C39A STC (CV2516) TH21C MazdaSAL39 USA CV3876 SV4X/150A STC (CV2519) MullardSD Ferranti SV280j40 (CV1068) 71-f{{,~714 11!P-tc/ C t/ {;O( (SD6 Cossor CV1989 SV280j80 (CV1069) TH29 TungsrarnSE211 Tungsrarn SV813 STC (CV26) TH30C MullardTH41 Mazda CV1411SE211C SV828 STC (CV631) TH62 MullardSGA1 Cossor SW5 Cossor CV3715 TH233 MazdaSG210 Hivac SW7 Cossor CV3719SG215 Mazda CV3702 SW7 Mullard (CV1609) TH2321 MazdaHivac SW35 Pen Cossor (CV1370) TH2620 MazdaSG220 Hivac (CV1018) TMC14 Cossor

SW40H Cossor (CV1076) TMC15B Cossor CV3730Mullard (CV103n SW40 Pen Cossor (CV1104) TMC16B Cossor CV3731SG250

SW70 Pen CossorS1M1 GECSW75 Pen Cossor (CV1371) ,S1M2 GEC

S1M3 GEC SW200 H Cossor' TMC20B Cossor CV3732S1M8 GEC

SW200L Cossor TP22 Mazda (CV1344)TP23 MazdaSW200 Pen Cossor TP25 Mazda (CV1345)

SL2 MOV S2 Ferranti (CV1018) TP26 Mazda CV3735SM95 \ Cossor (CV286) S2A STC (CV984)SM150 Cossor (CV287) S3A STC CV374SN947D USA (CV471)

S4VB Mullard (CV1677) TP2620 MazdaSN954 USA (CV473) TSE4 MullardS8 MOV TSP4 Mullard CV560SS22AF STC (CV39) TSW50 Cossor (CV1288)SN956B USA (CV224l) S23 MOV CV3691 TSW50A Cossor (CV1235)SPT2 Ferranti (CV1049) S23.(rnet) MOV CV3692SPT4A Ferranti (CV1282)

S24 MOV (CV1018) CV798SPT210. TS70 U.S.A.SP2 Mullard (CV1320) S25A STC (CV16) TTl-50S26A STC (CV53) TT4 Mullard (CV1179)S27A STC (CV82) TT9SP4 Mullard (CV1324) S28A STC (CV88) TT10 (CV26)

TungsrarnS30A STC (CV127)SP4B Mullard CV3703

Tungsrarn S130 Cossor (CV1110) TT11 MOV (CV1501)SP6 Cossor (CV136) MOV TT12 MOV (CV524)SP13 Mullard S130A Cossor CV3694 TT15 MOV (CV415)

Tungsrarn S130P Cossor (CV45) TT16 MOV (CV2J.3t) .SP13B Tungsrarn S215 MOV CV3695 TT1? MOV

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Type Maker or cv No. Type Maker or cv No. Type Maker or cv No.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearestin brackets) in brackets) in brackets)

TTl8 MOV (CV2666) UE972 USA CV642 U74 MOVTTl9 MOV UF41 Mullard U75/300 MazdaTTR31 Ferranti (CV22l) UF42 Mullard U76 MOVTTR31 Ferranti CVl748 UUI MulIard CVl977 U78 MOV (CV493)MC(9375) UU4 Mullard U81 MOVTTR31 Ferranti CV3840C-(J'1.-'lVjMR(9100) UU6 Mullard U82 MOV

UM34 Mullard U84 MOVTTR31 Ferranti CVl923 URIC . Mullard UIOI MOVMR(9375) UR3C Mullard CV3758 U107 MOVTube RGI CVl453 UU2 / Mazda U120/500 MazdaTube RG2 CV566TV03-10 Mullard CVl573 UU3 Mazda Ul43 (CV2862)TV03-10A Mullard CVI089 UU4 Mazda CV3759 U150/1100 B.T.H.

UU5 Mazda (CV1039) MazdaTV4 Mullard CVI412 UU6 Mazda CVI413 U201 MazdaTV4A Mullard VU7 Mazda CV3761 U235 EdiswanTX3-200 Mullard CV3739 U239 MOVTX4 (0) Tungsram (CV1194) UU8 MazdaTX5-400 Mullard CV3740 UU9 Mazda CVl855 U281 Mazda

UUIO Mazda U309 MOVTXI0-4000 Mullard UU30/250 Mazda U319 MOVTX12-12W Mullard UU60/250 Mazda U403 MazdaTYS2-250 Mullard Hivac U404 MazdaTYS4-500 Mullard CVl889TYS5-1000 Mullard UU120/250 Mazda U600 Ediswan CV3756

UU120/350 Mazda (CVI796) U709 MOV cv$90,C.TYS5-2000 Mullard Hivac U801 MazdaTYS5-3000 Mullard UUI20/500 Hivac (CV1064) U4020 Mazda (CVI267)TYI-50 Mullard (CVI288) UV203A USA CV2986 VAl6 Cinte1 CV5~TY2-125 Mullard (CVI924) UX6653 USA CV3592¥f~01( j7e- ('V~TY4-500 Mullard c.Ve..,n CinteI (CV285)UY21 Mullard VA50 Cintel (CV2132)TZ05-20 Mullard (CVI047) UY41 Mullard

C i/I~" VCRX192 GEC (CV2280)Mullard U3 /"toil VCRX210 GEC (CV389)Mullard U4 MOV (CVI608)VCRX2~ GEC

C ;/ $-Vf-.1Mullard U4 MCJv c.; 14-({. r1"J...CffC (t: >-'-CMullardVCRX22 GEC (CV2272)TZ2-250 Mullard (CVI618) U4B VCRX213 GECTZ2-300 Mullard CV3741 U5 MOV CV374} VCRX214 (CV2211)TZ20 USA CV3742 U5 (\lull Gill,,"" VCRX294 GECTZ40 USA (CVI076) U6 MOV CV3744 VCRX298 GEC (CV2184)U7 f{oll CV Ilf1T4D Mullard CV3721

l'Yal! C i1rLf¥' VCRX346 MullardT9/2 Ferranti U8 VCRX312 EMI (CV2222)T9/3 Ferranti UI0 MOV CV1443 VCRX351 EMIT11 Mazda U12 MOV (CVI064) VCRX352 EMIT12/2 Ferranti U14 MOV (CV1064) VCRX353 EMIU15 MOV CV3747T12/3 FerrantiVCRX356 GECT12/46 Ferranti U16 MOV (CVI290) VCRX361 GEC (CV2230)T20 USA CV3722 U17 MOV (CVI113) VCRX363 EMIT20G Cossor (CV1047) U18 MOV (CVI264) VCRX387 GECT20L Cossor U18/20 . MaV (CV3l) VCRX388 GECUl9 MaV (CV187)

~~'iJ~T21 Mazda CV3679VCRX390 ~,f/t..t-;J.tl)T31 Mazda U19/23 MaV (CVI87) VCRX393T41 Mazda CV3723 'U20 MOV (CV3l) VCRX398T200 USA CV3724 U21 Mazda CV3751 VCRX403 GECT250 MaV (CV1030) U22 Mazda CV3750 VCRX411 GECU23 MaV CV235T814 USA CV2658VCRX412 GECT2000 (CVI12l) U24 Mazda CVI921 VCRX415 EMIUAF42 Mullard U27 Mav (CV111l) VCR84 MAP CVI084UBC41 Mullard U29 MaV VCR85 MAP CV1085UBF80 Mullard U30 MaV CV3752 VCR86 MAP CVI086U30/250 Mazda

UBL21 MullardVCR87 MAP CV1087UB41 Mullard U31 MOV CV,3753VCR97 MAP CV1097UCH21 Mullard U33 MavVCR112 MAP CV11 12UCH42 Mullard U35 MOVVCR131 MAP CV1131UD143 Hivac (CV2293) U37 MaV (CV2289)VCR13lA MAP CV1548U41 MaV (CV2115)

UD166C Hivac (CV2257) U43 MaV VeR138 MAP CVl138UE301 USA CV621 U50 Mav (CV1268) VCR138A MAP CV1587UE905 USA CV625 U52 MOV (CV1071) VCR139 MAPUE938 USA CV638 U60/500 Mazda VCR139A MAP CV1588UE945 USA (CV735) U65/550 Mazda VCR140 MAP CV1140

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Type Maker or CYNo. Type Maker or CYNo. Type Maker or I CYNo.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearest

-in brackets) in brackets) in brackets)

VCR140A MAP CV1546 VLS405AS STC VR55 MOS (A) CV1055VCR511 MAP CV151I VLS412 STC VR56 MOS (A) CV1056VCR511A MAP CV1589 VLS417 STC VR57 MOS (A) CVI057VCR511B MAP CV1590 VLS432A STC VR57A MOS (A) CV1570VCR511C MAP CV1549 VLS452 STC CV3784 VR59 MOS (A) CVI059

VCR514 MAP CV1514 VLS492AB STC VR65 MOS (A) CVI065VCR515 MAP CV1515 VLS492AG STC (CV1527) VR65A MOS (A) CV1574VCR516 MAP CV1516 VMP4 MOV (CV1169) VR66 MOS (A) CV1066VCR516A MAP CV262 VMP4G MOV (CV1169) VR67 MOS (A) CV1067VCR517 MAP CV1517 VMP4 (Met) MOV (CV1169) VR75-30 USA, STC CV3798

VCR517A MAP CV1591 VMS4 MOV (CV1165) VR78 MOS (A) CV1078~

VCR517B MAP CV1592 VMS4B MOV VR82 MOS (A) CVI082VCR517C MAP CV1593 V04 Tungsram (CV2955) VR83 MOS (A) CVI083VCR517D MAP CV1594 VPTSB Ferranti VR90-30 USA CV3799VCR517E MAP CV1595 VPT2 Ferranti (CV1083) VR91 MOS (A) CV1091

VCR518 MAP CV1518 VPT4 Ferranti (CV1169) VR91A MOS (A) CV1578VCR518A MAP CV1596 VPT4B Ferranti (CV1169) VR92 MOS (A) CVI092VCR519 MAP CV1519 VPT210 Ferranti (CVI083) VR95 MOS (A) CV1095VCR520 MAP CV1520 VP2 Mullard CV3787 VR95A MOS (A) CV1579VCR521 MAP CV1521 VP2B MulIard CV520 VR99 MOS (A) CVI099

VCR522 MAP CV1522 VP4 (Met.) Mullard CV3788 VR99A MOS (A) CV1581VCR522A MAP CV1597 VP4A Mullard (CV11 69) VRlOO MOS (A) CV1100VCR522B MAP CV335 Tungsram VRlOl MOS (A) CVII01VCR522C MAP CV336 VP4B Mullard CV3582 VR102 MOS (A) CV1102VCR523 MAP CV1523 Tungsram VR105-30 USA, STC CV686

VP12D FerrantiVCR524 MAP CV1524 VP13A Mullard VRI06 MOS (A) CV1106VCR524A MAP CV1547 VRI06A MOS (A) CV1598VCR525 MAP CV1525 VP13B Tungsram VRI07 MOS (A) CV1107VCR526 MAP CV1526 VP13C Mullard CV3790 VR107AVCR527 MAP CV1527 VP13K Tungsram VRI08 MOS (A) CVl108

VP21 MOV (CVI083)VCR528 MAP CV1528 VP23 Mazda CV3792 VRI08A MOS (A) CV1599VCR529 MAP CV1529 '-",

",-, VR109 MOS (A) CV1109VCR530 MAP CV1530 VP24 (Met) CV3793 VRI09A MOS (A) CV1000VCR531 MAP CV1531 VP41 Mazda (CV21) VRl16 MOS (A) CV11 16VCR532 MAP CV1532 VP133 Mazda CV1457 VR117 MOS (A) CV1117

VP210 Mazda CV3794VCR533 MAP CV1533 VP215 Mazda CV3795 VRl17A MOS (A) CV1584VCU" A" AD CV968 Hivac VR118 MOS (A) CVl118VCU" B" AD CV969 VR119 MOS (A) CV11 19VCU" C" AD CV970 VP1321 Mazda VR122 MOS (A) CV1122VCU" D" AD VP1322 Mazda CV3796 VR123 MOS (A) CV1123

VCU" E" AD CV972VR3B MOS (A)

VR124 MOS (A) CV1124VR12 (c) MOS (A)VCU" F" AD CV973 VR14A MOS (A) VR125 MOS (A) CV1125VCU" L" , AD CV974 VR126 MOS (A) CVl126VCU" M" AD CV975 VR129 ' MOS (A) CVl129VCU" N" AD CV976 VR14B MOS (A~

VR130 MOS (A) CV1130

VCU" P" AD CV985VR17 MOS(A CVlO17

VR130A MOS (A) CV1586VR18 MOS (A) CV1018VFT6 Ferranti VR19 MOS (A) CVI019 VR135 MOS (A) CV1135VFOl BTH (CV80) VR21 MOS (A) CV1021 VR136 MOS (A) CV1136VF08 BTH (CV81) VR137 MOS (A) CV1137VG11 USA CV2976 VR150-30 USA, (CV216)

VR22 MOS (A) CV1022 STCVGT121 MOS (A) CV1121 VR24B MOS (A)VGT121A MOS (A) CV1585 VR27 MOS (A) CVI027 . VR502 MOS (A) CV1502VGT128 MOS (A) CV1128 VR28 MOS (A) CV1028 VR503 MOS (A) CV1503VHTA Ferranti (CV2956) VR32 MOS (A) CVI032 VR505 MOS (A) CV1505VHT2A Ferranti (CVI043) VR512 MOS (A)

VS2 Ferrimti CV3800VHT4 Ferranti (CV2955) VR35 MOS (A) CVI035VH2A Ferranti (CVI043) VR37 MOS (A) CV1037 VS16S0 CintelVI77 MAP CV1077 VR38 MOS (A) CV1038 VS18BO Cintel (CV3625)VIl03 MOS (A) CVI103 'VR40 MOS (A) CVI040 VS24 MOV CV3802VI132 MOS (A) CV1132 VR41 MOS (A) CV1041 VS24jK

(Met) MOV CV3803VI507 MOS (A) CV1507 VS26 MOV (CV161)VI507A MOS (A) VR43 MOS (A) CVI043

VS44X CintelVI507 AD CV86 VR44 MOS (A) CVI044(Glass) VR49 MOS (A) CV1049 VS44Y Cintel

VLS61 STC VR53 MOS (A) CV1053 VS68 MOS (A) CV1068VLS405 STC VR54 MOS (A) CVI054 VS69 MOS (A) CVI069

VS70 MOS (A) CVI070

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Type Maker or cv No. Type Maker or cv No. Type Maker or cv No.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearestin brackets) in brackets) in brackets)VSllO MOS (A) CVlllO VT31 MOS (A) CVI031 VT60 USAVSll0A MOS (A) CV1582 VT31 GPO CV1638 VT60A MOS (A) CVI572VS116AM Cintel VT31 USA CV947 VT61 MOS (A) CVI061VS118 Cintel VT31B GPO CV1639 VT61 GPO CV1609VS118T Cintel VT32 USA VT61A MOS (A) CV 1573VS118TA Cintel VT32B GPO CV1640 VT61B MOS (A) (CV18)VTX3 CV1094 VT32D GPO CV1641 VT62 MOS (A) CV1062VTX4 CVI026 VT33 GPO CVI642 VT62 GPO CVI606VTX7 CVI030 VT33 USA CV949 VT62 USA CV621VTl USA VT34 MOS (A) CV1034 VT63 USA CV2531VTIA MOS (A) VT34 GPO CV1614 VT64 USAVT1C MOS (A) VT34 USA VT65 GPO CV1649VT2 USA VT35 GPO CV1615 VT65 USA CV582VT3 USA VT35 USA CV1752 VT65A USA CV581VT4A USA VT36 GPO CV1602 VT66 GPO CV1650VT4B MOS (A) CV1553 VT36 USA CVI775 VT66 USA CV1912VT4B USA VT37 USA CV606 VT66A USA CVI911VT4C USA CV2576 VT37B GPO CV1643 VT67 USAVT5 USA VT37C GPO CVI644 VT68 GPO CV1651VT5B MOS (A) VT38 GPO .CV1645 VT68 USA CV1891VT6 USA (CV2577) VT38 USA CV712 VT69 GPO CV1652VT7 USA VT38A GPO CV1646 VT69 USA CV1900VT8 USA (CV2563) VT39 USA (CV2723) VT70 USAVT9B MOS (A) VT39A USA (CV2723) VT72 GPO CV249VTlO GPO CV1610 VT40 GPO CV1647 VT12 USAVTlO USA VT40 usA CV2501 VT73 MOS (A) CVI073VTI0D MOS (A) VT41 USA CV2671 VT73 USA CV639VTll GPO CVI611 VT42 USA CV642 VT73A GPO CV1653VTll USA VT42A USA VT74 MOS (A) CVI074VT12 USA VT43 USA CV735 VT74 GPO CV1654VT13 USA VT44 USA CV711 VT74 USA CV1864VT13B MOS (A) VT45 MOS (A) CVI045 VT75 MAP CV1075VT13C MOS (A) VT45 USA CV610 VT75 GPO CV1655VT14 .USA VT46 MOS (A) CV1046 VT75 USA CV614VT16 GPO CV1607 VT46 GPO CV1616 VT75A MOS (A) CV1576VT16 USA VT46 USA (CV32) VT75B MOS (A) CV1577VT17 GPO CV1608 VT46A USA (CV32) VT76 MOS (A) CV1076VT17 USA cV640 VT47 MOS (A) CV1047 VT76 USA CV615VT18 USA VT47 GPO CV1603 VT77 USA CV616VT19 GPO ' cV1612 VT47 USA CV1772 VT78 GPO CV1656VT19 USA CV641 VT48 USA CV608 VT78 USA CV2544VT20 MOS (A) cVI020 VT49 USA cVI771 VT79 MOS (A) CV1079VT20 USA VT50 USA CV2533 VT79A GPO CV1657VT21 GPO cV1613 VT50 MOS (A) CV1050 VT80 MOS (A) CV1080VT21 USA VT51 MOS (A) CVI051 VT80 USA CV617VT22l USA CV2563 VT51 GPO CV1617 VT80A GPO CV1658VT23 MOS (A) cVI023 VT51 USA VT81 MOS (A) cVI081VT23A MOS (A) CV1565 VT52 MOS (A) CVI052 . VT81 GPO CV1659VT24 GPO CV1636 VT52 GPO (cVI025) VT82 GPO CV1660VT24 USA CV2675 VT52 USA cV59fj VT83 USA CV618

VT25 MOS (A) cVI025 VT53 GPO CV1604VT84 USA CV619VT25 GPO CV1637 VT54 GPO CV1618VT85 GPO CV1661VT25 USA CV603 VT54 USA CV1751VT86 GPO CV1662VT25A MOS (A) CV1567 VT55 USA CV2676VT86 USA cV1942VT25A USA VT56 GPO cV1648VT86A USA CV1941

VT26 MOS (A) cVI026 VT56 USA. CV611 VT86B USA CV1943VT26 USA VT57 GPO CV25 VT87 \ GPO CV1663VT26 GPO CV1600 VT57 USA CV612 VT87 USA CV1951VT26A MOS (A) CV1568 VT58 MOS (A) cVI058 VT87A USA CV1950VT27 GPO CV1601 VT58 GPO CV1619 VT88 MOS (A) CV1088

VT27 USA CV604 VT58 USA CV613 VT88 GPO CV1664VT28 USA cV936 VT58A MOS (A) CV1571 VT88 USA CV1963VT29 USA CV944 VT59 GPO CV1620 VT88A USA CV1962VT30 MOS (A) cVI030 VT60 MOS (A) cVI060 VT88B USA CV1964VT30 USA CV750 VT60 GPO cVI605 VT89 MOS (A) cVI089

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Type Maker or CV No. Type Maker or CV No. Type Maker or CV No.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearestin brackets) in brackets) in brackets)

VT89 GPO CV1665 VT114 MOS (A) CV1114 VT142 USAVT89 USA CV833 VT114 GPO CV1682 VT143 GPO CV1696VT90 MOS (A) CV1090 VT1114 USA CV1846 VT143 USA CV625VT90 GPO CV1732 VT114A MOS (A) CV1583 VT144 GPO CV1371VT90 USA CV1930 VT115 GPO CV1683 VT144 USA (CV26)VT90A -- USA CV1931 VT115 USA CV1948 VT145 GPO CV243VT91 GPO CV1038 VT115A USA CV1947 VT145 USA CV1861VT91 USA CV1936 VT116 GPO CV1684 VT146 GPO CV1625VT91A USA CV1937 VT116 USA CV591 VT146 USA CV1823VT92 GPO CV1735 VT116A GPO CV1685 VT147 GPO CV1697VT92 USA CV588 VT116A USA CV592 VT147 USA CV1802VT92A USA CV587 VT116B USA CV866 VT148 GPO CV1698VT93 MOS (A) CV1093 VT117 USA CV1981 VT148 USA CV1811VT93 GPO CV1666 VT117A USA CV1982 VT149 GPO CV1349VT93 USA CV1894 VT118 USA CV1088 VT149 USA

VT93A USA CV1893 VT118A GPO CV1686 VT150 GPO CV1699VT94 MOS (A) CV1094 VT118B GPO CV1687 VT150 USA CV1966VT94 GPO CV1667 VT119 GPO CV1169 VT150A GPO CV1700VT94 USA CV1933 VT119 USA (CV597) VT150A USA CV1967VT94A USA CV1932 VT120 GPO CV1688 VT151 GPO CV1701

VT94B USA VT120 USA (CV1095) VT151 USA CV578VT94C USA VT121 USA (CV1059) VT151B USA CV580VT94D USA CV1934 VT121A GPO (CV1288) VT152 GPO CV1702VT95 GPO CV1668 VT122 GPO (CV244) VT152 USA CV1940VT95 USA CV1831 VT122 USA VT152A USA CV1938

VT96 MOS (A) CV1096 VT123 USA CV2715 VT153 GPO CV1703VT96 USA CV1957 VT124 USA CV756 VT153 USA CV837VT96B USA VT125 GPO CV1689 VT154 GPO CV1067VT97 USA CV1849 VT125 USA CV1805 VT154 USA CV629VT98 MOS (A) CV1098 VT126 GPO CV1690 VT155 GPO CV1704

VT98 GPO CV1669 VT126 USA CV573 VT155 USAVT98 USA CV504 VT126A USA CV572 VT156 GPO CV1705VT98A MOS (A) CV1580 VT126B USA CV574 VT156 USAVT99 USA CV1917 VT127 MOS (A) CV1127 VT157 GPO CV1706VT100 GPO (CV1670) VT127 GPO (CV1187) VT157 USA

VT100 USA (CV124) VT127 USA VT158 GPO CV1707VT100A USA VT127A GPO CV1691 VT158 USA CV997VT100B GPO CV1670 VT127A USA VT159 GPO CV1708VT101 USA CV637 VT128 GPO CV1692 VT159 USAVT102 GPO CV1671 VT128 USA CV2715 VT160 GPO CV1709

VT102 USA VT129 GPO VT160 USAVT103 USA CV1990 VT129 USA VT161 GPO CV1710VT103B GPO CV1672 VT130 GPO CV1621 VT161 USA CV537VT104 MOS (A) CVll04 VT130 USA VT162 GPO CV1711VT104 GPO CV1040 VT131 GPO CV1168 VTI62 USA CV697

\

VT104 USA CV546 VT131 USA CV543 VT163 GPO CV1712VT105 MOS (A) CV1105 VT132 GPO CV1694 VT163 USA CV1896VT105 GPO CV1673 VT132 USA VT164 GPO CV1713VT105 USA CV1969 VT133 GPO CV1695 VT164 USA CV723VT106 GPO CV1674 VT133 USA CV700 VT165 GPO CV1714

VT106 I USA CV623 VT134 USA CV525 VT165 USAVT107 GPO CV1675 VT135 USA CV535 VT166 GPO CV1715VT107 USA CV510 VT135A USA CV534 VT166 USAVT107A USA CV511 VT136 GPO CV1118 VT167 GPO CV1716VT107B USA CV509 VT136 USA CV659 VT167 USA CV1945

VT108 GPO CV1676 VT137 GPO CV1081 VT167A USA CV1944VT108 USA VT137 USA CV1755 VTI68 GPO CV1626VT109 GPO CV1677 VT138 GPO CV1623 VT168A USA CV515VT109 USA CV1798 VT138 USA CV1756 VT169 GPO CV1717VT110 GPO CV1678 VT139 GPO CV399 VT169 USA CV531

VTll1 GPO CV1679 VT139 USA (CV216) VT170 GPO CV1718VT111 USA CV836 VT140 GPO CV1166 VT170 USA CV766VT112 GPO CV1680 VT140 USA (CV662) VT171 GPO CV1719VT112 USA CV660 VT141 USA VTI71 USA CV782VT113 GPO CV168I VT142 GPO CVI039 VT171A USA

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Type Maker or CV No. Type Maker or CV No. Type Maker or

Icv No.


VTI72 USA CV784 VT207 USA CV529 VT287 USA CV2663VT173 USA CV785 VT208 USA VT288 USA CV922VT174 USA CV820 VT209 USA CV694 VT289 USA CV924VT175 USA CV655 VT210 USA CV783 VT501 MOS(A) CV1501VT176 USA CV1873 VT211 USA CV1978 VT501A MOS(A) CVI002

VTI77 GPO CVI720 VT212 USA CV650 VT506 MOS (A)- CV1506VT177 USA CV780 VT213A USA CV862 VT509 MOS (A) (CV62)VT178 GPO CVI721 VT214 USA CV916 VT510 MOS (A) CV1510VT178 USA CV778 VT215 USA CV1906 VT513 MOS (A) (CV44)VT179 GPO CV1722 VT216 USA CV724 VU6A MOS (A)

VT179 USA CV781 VT2l7 USA CV628 VU7A MOS (A) CV1556VT180 GPO CV1053 VT218 USA CV2552 VU16A MOS (A)VT180 USA VT219 USA VU29 MOS (A) CV1029VT18l GPO CV1052 VT220 USA CV2589 VU33 MOS (A) CV1033VT181 , USA CV1790 VT22l USA CV819 VU39 MOS (A) CVI039

VT182 GPO CV1723 VT222 USA CV647 VU39A MOS (A) CV1569VT182 USA CV811 VT223 USA CV1820 VU64 MOS (A) CV1064VT183 GPO CV1724 VT224 USA (CVI8) VU71 MOS (A) CV1071VT183 USA CV2709 VT225 USA CV26l2 VU71A MOS (A)VT184 USA CV3799 VT226 USA CV817 VU72 MOS (A) CVI072

VT185 GPO CV245 VT227 USA (CV51O) VUlll MOS (A) CVllllVT185 USA CV8l5 VT228 USA CV662 VUl13 MOS (A) CVl113VT186 GPO CVI726 VT229 USA CV1985 VU120 MOS (A) CV1120VT186 USA VT230 USA CV2629 VU120A MOS (A) CVlO01VT187 GPO CV1627 VT231 USA CV1988 VU133 MOS (A) CV1133

VT187 USA VT232 USA CV2920 VU133A MOS (A) (CV54)VT188 GPO CVI727 VT233 USA CV867 VU134 MOS (A) CV1134VT188 USA CV891 VT234 USA CV3505 VU504 MOS (A) CV1504VT189 GPO CV1128 VT235 USA CV3506 VU508 MOS (A) CV1508VT189 USA CV893 VT236 USA CV636 VW36 MOS (A) CVI036

VT190 GPO CVI728 VT237 USA CV2700 VW42 MOS (A) CV1042VT190 USA CV895 VT238 USA CV649 VW48 MOS (A) CV1048VT191 GPO CV1628 VT239 USA VXR130 USA CV3738VT19l USA CV683 VT240 USA (CV1090) VX32 Victoreen (CV495)VT192 USA CVI770 VT24l USA CV2704 VX41 Victoreen (CV2730)

VT193 GPO CV1100 VT243 USA CV2706 VX3138 GEC (CV2341)"VT193 USA CV1777 VT244 USA CV575 VX3191 GEC C viilo4.VT194 GPO CV587 VT245 USA CV2565 VX3192 GEC ~ ;/ i+<J' 2-VT194 USA CV897 VT246 USA CV2692 VX3l93 GEC (CV2318)VT195 GPO CV1863 VT247 USA CV1882 VX3204 GEC

VT195 USA CV2874 VT248 USA VX3205VT196 GPO CV509 VT249 USA VX3208 GEC (CV4038)VT196 USA (CV574) VT250 USA (CVI09l) VX3213 GECVT197 GPO CV1629 VT251 USA VX3232 GEC (CV4002)VT197A USA CV1856 VT252 USA VX3233 GEC (CV4007)

VT198 GPO CVI075 VT254 USA CV261l VX3234 GEC (CV4024)VT198A USA CV1926 VT255 USA CV3587 VX3235 GEC (CV4034)VT199 GPO CV124 VT256 USA VX3236 GECVT199 USA CV1993 VT257 USA CV1807 to VX3504 MOVVT200 GPO CV1065 CV18l0 VX4140 BTHVT259 USA (CV2666)

VT200 USA CV686 VX414l BTHVT20l GPO CV1056 VT260 USA CV3798 VX4142 BTH (CV2308)VT201 USA CV552 VT264 USA CV818 VX4l43 BTH (CV2309)VT201C USA CV553 VT266 USA CV656 VX4144 BTH (CV1881)VT202 GPO CV1054 VT267 USA CV2967 VX5028 EMI (CV2346)VT268 USA CV540

VT202 USA CV664 VT269 USA CV3594 VX5029 EMI (CV2116)VT203 GPO CV9 VT277 USA (CV2642) VX5038 EMI (CV2276)VT203 USA CV665 VT279 USA VX5048 EMIVT204 GPO CV18 VT280 USA VX5049 EMIVT204 USA CV789 VT281 USA VX6108 Ediswan (CV2243)

EdiswanI

(CV2253)VT205 GPO CV1630 VT282 USA VX6109VT205 USA CV1996 VT283 USA VX6114 EdiswanVT206 GPO CVll20 VT284 USA VX6119 EdiswanVT206A USA CV729 VT285 USA VX6l20 EdiswanVT207 GPO CVI091 VT286 US1 CV788 VX6l21 Ediswan

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Type Maker or CV No. Type Maker or CV No. Type Maker or cv No.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearestin brackets) - in brackets) in brackets)VX6127 Ediswan CV ~{)fcJ VX8144 Mullard (CV4024) VI023 Mazda CV3776VX6131 Ediswan VX8145 Mullard V1029 Mazda CV3777VX7058 STC (CV4003) VX8148 Mullard (CV4037) V1040 Mazda (CV987)VX7059 STC (CV4004) VX8149 Mullard (CV4034) V1042 Mazda (CV275)VX7060 STC (CV4024) VX8157 Mullard c;/~ VI043 Mazda (CV401)VX7061 STC (CV4005) VX8161 Mullard V1047 Mazda (CV961)VX7075 STC (CV4015) VX8162 Mullard (CV4024) V1052 Mazda (CV441)VX7076 STC (CV4025) VX8163 Mullard VI063 PI Mazda (CV400)VX7077 STC VX8178 Mullard VI101 Cesser (CV1361)VX7078 STC (CV4012) -VX8179 Mullard cv'Ofi. V1105 Mazda CV3778X'~t.~ ~VX7079 STC (CV4009) VX8180't Mullard C.v~w

V1111 Mazda (CV1127)VX7080 STC Cv /.{UJe- VX8184 Mullard V1120 Mazda (CV72)VX7081 STC (CV4006) VX8185 Mullard V1120B Mazda (CV73)VX7082 STC cv~~~ VX8208 Mullard Vl133 Mazda (CV276)VX7083 STC (CV4014) VX9132 EEV ClI4C/{2 Vl135B Mazda (CV345)VX7100 STC CV iPJ(,"'} . VX9133 EEV c..vUo"-.,, Vl135C Mazda (CV377)VX7102 STC Cv l/J3n..... VX9151 Ferranti (CV2340) V1501 Ediswan CV3581VX7108 STC (CV2659) VX9168 Ericssen ~CV2321) V1505 Ediswan (CVI252)VX7110 STC V20 Tungsram CV764) V1507A Ediswan (CVI504)VX7111 STC (CV4002) V30 Tungsram V1901 Ediswan (CVI504)VX7112 STC (CV4033) V63 Vl904 (CV1072)VX7113 STC (CV400~ V119 Mazda V1906 Mazda (CV20)VX7114 STC Ct/' {to Vl20 Mazda CV3762 V1907 Mazda (CVl111)VX7115 STC "cl! Q,c!>/ Vl23B Mazda CV3763 V1910 MazdaVX7116 STC (CV4036) V226 Mazda CV3765 V1913 Mazda (CVI508)VX7119 STC (CV4037) V230AjlK STC (CV234) Vl920 Ma.zda (CVI21)VX7120 STC (CV4034) V230CjlD STC (CV230) Vl922 Mazda (CV74)VX7121 STC (CV4030) V233AjlK STC (CV2190) VI924 Ediswan (CV100)VX7122 STC V235AjlK STC (CV222l) VI928 Mazda (CV261)VX7124 STC cv'4-O'e- V239CjlK STC C ,froq.&- V1939 Mazda (CV371)VX7125 STC V240CjlK STC V2024 Ediswan (CVI25)VX7127 STC C.v lJ. clf7 V240Cf2K STC (CV2;89~ V2030F Ediswan (CV349)VX7128 STC (CV4035) V241C/IK STC e tI o,? V2046A Ediswan (CV486)VX7129 STC (CV4007~ V245 Mazda (CV1367 V2053 Ediswan (CV403)VX7130 STC cv!{JOq. V246AjlK STC (CV228) WD30 MOV CV3810VX7131 STC Cv lfOC.., V248A Mazda (CV1366) WE3A USA CV3812VX7501 STC V257 Mazda (CVI723) WE8A USA CV3813VX7502 STC V312 Mazda CV3766 WE258B USA CV2594VX7503 STC c,/ /t-Oq,.; V336 Mazda WE262B STC (CVl728)VX8079 Mullard (CV4025) V339 Mazda CV3767 WE289A USA CV1836VX8080 Mullard V428A Mazda (CV1366) WE295A USA CV2986VX8081 Mullard (CV4031) V453 Mazda WE300B USA CV2609VX8082 Mullard

(~~tgr~V455 Mazda WE322A USA CV623VX8083 Mu11ard V455A Mazda WE327A USA CV926VX8086 Mullard (CV2255) V503 Mazda CV3768 WE}31A USA CV625

VX8092 Mullard (CV2299) V625 Hivac (CV93) WE350D USA CV621VX8096 Mullard V625 Mazda WE368A USA CV710VX8097 Mullard cvq.e~i V630 Mazda (CV201) WE417A USA (CV3789)VX8098 Mullard C iI J.{J)'if V717 Mazda WE705A USA CV3587VX8099 Mullard CV46-C6 V817 Mazda WE710A USA (CV62)VX8100 Mullard (CV4010) V872 Mazda (CV1116) WE729A USA (CV539)VX8101 Mullard (CV4009) V877 Mazda CV3769 WE1378X USA CV761VX8102 Mullard V884 Mazda (CV131) WL203A USA CV2986VX8116 Mu11ard

le v~lf~)V885 Mazda (CV132) WL417A USA CV2642VX8117 Mullard V887 Mazda (CV136) WL532 USA CV2647

VX8132 Mullard V914 Mazda (CVl170) WL532A USA CV2647VX8133 Mullard V944A Mazda CV3797 WL535 USA (CV2611)VX8135 Mullard V995 Mazda CV3770 WL538 USA (CV62)VX8136 Mullard (CV4003) V955B Mazda WL578 USA CV2967VX8137 Mullard (CV4004) V960 Mazda WL629 USA CV648

VX8138 Mullard (CV4005) V970 Mazda CV3772 WL7I5B USA CV2655VX8139 Mullard VI0I0 Mazda CV3773 WL735 USA (CV2680)VX8140 Mullard (CV4002) VI017 Mazda WL806 USA CV2658VX8I4I Mullard VI020 Mazda CV3774 WL892R USA CV904VX8I42 Mullard VI02I Mazda CV3775 WL2050 USA CV2565

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.in brackets) in brackets) in brackets)

WL5846 USA CV2859 XY1.4C Hivac Z80lU Mullard (CV2255)WXl2 USA

c..V ~~{z..XYI·5V Hivac Z900T Mullard

W7/1D STC XY2'OV Hivac OA2 USA CV1832W7/2D' STC (CV2188) Xl4 MOV OA3 USA (CV3798)WIO/ID STC Xl7 MOV (CV782) OA3/VR75 USA (CV3798)

STCWl7 Mav (CV785) X21 Mav CV3816W21-4pin MOV CVI71 X21 (Met) Mav CV3817 OA4G USA CV752W21-7 pin MOV CV3804 X22 MOV CV3818 OB2 USA CVl833W30K MOV CV3805 X23 MOV (CVI082) OB3 USA CV3799W31 MOV CV3806 X24 Mav CV3819 OB3/VR90 USA CV3799

OC3 USA (CV686)W61 MOV X24 (Met) MOV CV3820W63 MOV (CV11 83) X31 MOV CV3821 OC3/VRI05 USA (CV686)W76 MOV X31 (Met) MOV CV3822 CossorW77 MOV (CV13l) X41 MOV (CV1460) STCW81 MOV X41 (Met) MOV (CV3823) OC3W USA

OD3 USA ~CV216)WIOI MOV X42 MOV (CV3576) OD3/VRI50 USA CV216)WI07 MOV X61 MOV CossorW143 Marconi- X61M MaV (CV28I)

OD3WSTC

phone X63 MOV CV3825 USAWl48 Marconi- X64 MaV (CV1280)

phone OG3 Mullard - (CV449)W727 MOV (CV454) X65 MOV CV3826 OZ4 USA CV692X'C le;' Hlvl\-t. cV 54« X66 MOV (CVI099) STCXBI Hivac (CV2293) X76M MOV FerrantiXDI·5V Hivac X78 MOV

Cv~/((OZ4A USA CV517

XD2'OV Hivac X79 MOV OIA USA CV750XEI Hivac (CV495) STCXE2 Hivac (CV2202) X81 MOV 02DF Mullard (CV2260)X"e 17 t~ l/ltC- e" '(J7f XIOI MOVXFGI Hivac XI09 MOV 09 Cossor CV2725XFTI Hivac Xl43 Marconi- I 09D Cossor (CV1596)XFWIO Hivac phone 09J Cossor (CVI518)XFW20 Hivac Xl48 Marconi- IAB6 PhilipsXFYIO Hivac phone lAC6 Philips

MullardXFYll Hivac X661 Hivac (CV2183)XFYl2 Hivac X662 Hivac { (CV2234) lAD4 USA (CV2237)XFY21 Hivac (CV2256) IAH4 USAXGQ2-6400 Mullard X727 MOV (CV453) IAH5 PhilipsXGR Y13 Hivac lA3 USA CV753

Y61 MOV (CVI 103) HivacXGR3 (CVI5I) CossorXGI-2500 Mullard Y63 MOV (CV1103) lA4E STCXG5-500 Mullard (CV2957) Y65 MOV (CV51) CossorXG15-12 Mullard Y220 Hivac (CVl1I8)XHPl'5V Hivac ZAl' MOV (CV1175) lA4P USA CV754

ZA2 MOV (CV1095) IA5G USA CV755XHI'5V Hivac CV3830 STCXH2·0V Hivac ZDl7 MOV (CV784) TungsramXH3-045 Mullard (CV372) ZG532 USA CV2647 IA5GT USA CV756XH8-100 Mullard (CVI787) ZG547 USA (CV372) STCXH16-200 Mullard (CV2520) ZP455 USA CV2789 IA5GT/G USA CV756

ZP477 USA CV914 FerrantiXLOI'5V Hivac 2$2dt!J (Cll/lftNT1 Cv0o~ lA6 USA CV757XL02'OV Hivac (CVI701) ZP527 USA CV855XLI'5V Hivac (CVI720) ZP579 USA CV3842 IA6E CossorXL2'OV Hivac CV3831 ZP584 USA CV3843 lA7G USA CVl800XN (CVI4) ZP590 USA CV3844 STC

Z6GI~~

CossorXPI'5V Hivac (CVI76) Z&:u ct/sotlf TungsramXP2·0V Hivac CVl702 Z14 MOV lA7GT/G USA CV1802XP230 Cossor Z21 MOV CV3836 FerrantiXRI-3200 Mullard (CV2210) Z21 (7 pin) MOV CV3837 STC

XRI-6400 Mullard (CV22I5) Z22 MOV (CV1322) IA7VG CossorZ62 ~V CV3838 IB3GT USA CVl830

XSGI'5V Hivac (CV175) ~;)..'L "~v'/7 c V5if~

XSG2'OV Hivac CV3833 Z63 MOV IB4P USA CV758XVS2·0V Hivac Z66 MOV CV3839 IB5/25S USA CV759XWO.75A Hivac Z77 MOV (CVI 38) IB7GT USA CV760XWO.75B Hivac Z90 MOV (CVI091) IB21A USA CV3586

Z239/1G STC (CV2187) IB22 USA CV761

XWO.75C:Z'7::;t \J5',q. CV$66>o

Hivac Z300 Mullard (CV1992) IB23 USA CV539XWl·5V Hivac Z309 MOV IB24 USA CV725XW2·0V Hivac (CV1703) I Z719 MOV IB24A USA CV3548XYl.4A Hivac Z729 MOV IB26 USA CV576XYI.4B Hivac Z800U Mullard (CV2236) IB27 USA CV713

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IB32/532A USA CV2648 lLA6 RCA CV775 lQ22 USA CV3555lB32 USA CV2648 lLA6E STC lR4/l294 USA CV2709lB33 USA Cv lLB4 RCA CV776 lR5 USA (CV782)lB35 USA CV369 lLB6 STC FerrantiIB35A USA CV3628 lLC5 USA CV777 ET

c.. If' 5"7 '7STC

lB36 USA lLC6 USA CV778 TungsramlB37 USA lLD5 USA CV779 lS4 USA (CV783)lB37A USA STC FerrantilB38 USA CV3549 lLH4 RCA CV780 STClB40 USA CV29l4 STC Tungsram

lLN5 RCA CV78l CossorlB4l USA CV3550 STC lS5 ,USA (CV784)lB49 USA CV>dJ: lLN5E STC CV781 FerrantiIB56 USA CV3877 STCIB58 USA CV3745 lU USA (CV1758) TungsramlB60 USA STC ET

CossorlB63A USA CV2826 1M3 Philips lS24KlCPl ET (CV2302) lN5EG lT2/R16 STClCPl1 ET lN5G USA CV182l lT2 USAlCl Mazda (CV782) 'Cossor STCIC5EG STC lT4 USA (CV785)

Tungsram FerrantilC5G USA CV1803 lN5GT USA CV1823 STC

Cossor STC TungsramFerranti ETSTC lN5GT/G USA CV1823 ' HivacTungsram Ferranti lT5GT RCA CV1829

lC5GT USA CV1805 lN5VG CossorSTC lN2l USA CV727 lU4 USA CV2507

lC5GT/G USA CV1805 lN2lB USA CV367 lU5 USA C ,;''3c,t2...Ferranti lN2lC USA CV3525 STC

lC6 STC ;"'7.,;1 IJ SA- C V~-C'I2. IV RCA CV1999Cossor lN23A USA CV749 lX2A USA <: ./ )0"12-

lC6G Cossor lN23B USA CV2856 lZ2 USA CV25l0lN23BM USA CV2857

lC2l USA CV762 lN24 USA 2A CossorID5 STC CV764 lN25 USA CV29l6 2APl USA 'CV790lD5GP RCA CV705 I tJ 2.~c.e J).fI c clSc;r"3 2APlA USA CV790lD5GT RCA CV1806 2A3 USA CV183llD6 STC lN26 USA c.. 0/ ("f~ STC

\ lN28 USA CV2918 2A5 USA CV1834lD7G RCA CV765 lN31 USA CV3509 STClD8GT RCA CV1811 lN34 USA eV2829 TungsramID13 Mazda (CV753) IN38 USA CV355llE3 Mullard frJ 32..... iJ S A- C J~t' 2A6 USA CV1769

PhilipsJcVi9~21

TungsramlE5GP RCA CV766 IN38A USA 2A7 USA CV787

lN42 USA TungsramlE5GT RCA eV766 lN43 USA CV29l9 2BPl USA CV3678lE7G RCA CV1812 lN47 USA CV3729 2B4 USA CV648lFD9 Mazda (CV784) lN54A USA CV296l 2B7 USA CV1837lF2 Mazda (CV1758) IN 9'> VSn CV~t\ TungsramlF3 Mazda (CV785)

lN69 USA CV2923 2B7 GECIF4 RCA CV767 IN70 USA ("C>c ,\CV2924 2B20 GEeIF50 RCA CV768 IN72 USA CV2974 2B21 USA CV597IF6 RCA CV769 IN8l USA CV2928 2B22 USA CV2931'IF7GV ReA CV770 lP5GT RCA CV7!o8 2B36 USA (CVI078)IG4GT RCA CV18l7 ,tI.J"rg VS"A ells '4-

t~,q~ vS" lot C.l ;'~k 2C2l USA eV8751 O'~oS"A-

(C~~#'lG4GT/G RCA CV1817 Mazda 2C22 RCA CV792lG5G RCA CV771 IPl1 Mazda 2C26 USA CV802IG6G RCA CV772 lP21 USA tV337

)2C26A USA (CVI759)

IG6GT RCA CV773 lP23 USA CV2680) 2C33 USA CV793IG6GT/G RCA CV773 lP30 USA CV1764)

2C34 USA (CVI 8)2C39A USA CV2516

IH4G RCA CV774 IP3l USA CV38l2 2C40 USA CV2643IH5G USA CV1818 IP32 USA "(CV40S) 2C42 USA CV2932

STC lQ5G USA CVl824 2C43 USA CV688Cossor STCTungsram Tungsram

lH5GT USA CVl820 IQ5GT USA CV1826 2C46 USA CV2933STC Ferran# 2C51 USA CV2831

IH5GT/G USA CV1820 STC 2C51W USA CV28,66Ferranti IQ5GT/G USA CV1826 2C53 USA CV3559

lLA4E STC Ferranti 2DPl USA CV1813

. _. - ~ ~ . .-

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2D2 Mullard CV794 2Xj102G STC 3Bj151A STC (CV1648)

2D4 Mullard 2Xj103G STC 3Bj170A STC

2D4A Mullard CV795 2Xj104G STC 3Bj200-B STC (CV1047)

2D13 Mullard 2Xj105G STC (CV448) 3Bj240M STC (CV2214)

2D13A Mullard 2Xj106G STC (CV425) 3Bj252B STC (CV1688)>t?/Ut IS s't'c (; t/ "/(~

2D13C(o) Mullard CV796 2Y2 RCA CV597 3Bj351A STC (CV1448)

2D21 USA (CV797) 2-100Aj CV2967 3Bj351B STCSTC 100R 3Bj352A STCMullard 2-150D USA CV3878 3Bj400A STC CV1452

Hivac 2-150Dj USA CV3878 3Bj401J STC (CV127) .

ET 152RA2D21W USA CV2876 3·5MS1 Cin Tel 3Bj501A STC (CV49)

2D41 E. K. Cole 1-140- IJ5r4 C./ ~c~~ 3Bj504A STC2E22 USA CV798 3j8G BTH 3Bj504B STC (CV1288)

3A W.Electric CV3812 3Bj850A STC (CV25)2E30 USA CV2517 (USA) 3Bj851A STC (CV1620)2G Siemens CV1842 3AB Mazda2121 USA CV2778 3AB W.Electric CV3812 3C4 Philips2121A USA CV719 (Eng.) 3C22 USA CV9992122 . USA CV800 3AP1j906P1 RCA CV602 3C24 USA CV789

3C31/C1B USA CV17652126 USA CV1760 3AP1 USA CV602 3C34 USA CV9412131 USA ~~II CV1807 3A4 {USA (CV807)2132 . .USA ~1I11 CV1808 Cossor C (;2:)'1. 0 3C45 USA (CV372)2133 USA it'"v CV1809 STC 3Cj150A STC2134 USA kiV CV1810 3A5 USA (CV808) 3Cj250A(o) STC (CVI034)

3AjI05-B STC CV809 3Cj270A STC (CV1252)2136 USA il!V CV514 3Aj107A STC (CV249) 3C/350E STC (CV30)2J42 USA r:..~1I CV3676

MulIard 3Aj107AY STC 3Cj351H STC (CV27)2J48 USA CV1822 3Aj107B STC (CV1655). 3DP1- USA CV8162J49 USA CV3687 3Aj107BY STC 3D6j1299 USA CV8152J50 USA CV2793 3Ajl08A STC (CV1653) 3D6 STC

3Aj108AY STC 3D21A USA~STC CV26592J51 USA CV35602J53 USA 3Aj108B STC (CV1657) 3D22 USA~ STC CV28512J54 USA CV801 3Aj108BY STC 3DjIOOA STC CV14222156 USA CV2852 3AjI09A STC (CV1671) 3Dj150G STC CV27352J58 Raytheon CV997 3Aj109AY STC 3EG1 Cintel CV1526)

3AjI09B STC (CV1663) 3EP1 USA CV8172K25 USA CV27922K28 USA CV1892 3A/109BY STC 3EP1j1806P1 USA CV8172K33 Raytheon CV1786 3Aj110A STC 3E29 USA CV35992K41 USA CV3904 3Aj110B STC (CV1659) 3FP7 USA CV17612K48 USA CV3669 3Aj135A STC CV2598 3GP1 USA CV516

3Aj141A STC (CV1639) 3GRK GEC (CV442)2P Cossor2Q28

(CV469)3Aj141AY STC 3Gj501A STC

2Sj140G STC 3Aj142jA STC (CVl641) 3Hj150J STC2Tj200E STC 3Aj142jAY STC 3Hj151J STC CV25162Tj270K STC (CV261) 3Aj144A STC (CV1694) 3JP1 USA CV2935

3Ajl44AY STC 3JP7 USA CV2869

2Tj450E STC (CV3587) 1f{;; GJS(.V CV l!lftO§A 8VNI2V3 RCA CV803 3A/145J STC (CVl6) UA2V3G RCA CV804 3Aj146J STC (CV53) 3131 USA CV17882Vj400A STC (CV32) 3Aj147J STC (CV82) 3Jj160E STC (CV2245)2V/401C STC CV1446 3Aj148J STC (CV88) 3Jj170E STC CV2905

3Aj154M STCc V"i~"2.

3Jj192E STC~1tt'('1 /'1 $'fC.. ');;l"(,z . -?rC- CV)Off.

2V/470C STC (CV1355) 3B 1 USA 'CV8142V/471A STC ~CV1449) 3BPIA USA CV2934 3Jj221E STC2Vj500C STC CV5) 3B4. USA (CV2240) 3Jj221S STC2Vj530E STC CV1420 3B7j1291 USA CV811 3Jj260E STC CV29082Vj531E STC 3B21 USA .CV2959 3KP1 USA CV3733

3NP4 Mullard3B22 USA CV3815 Philips

2Vj560E I STC 3B24 USA CV8122V/561E STC 3B24W USA CV28582Vj590E STC 3B24WA USA CV4021 3P/270B(o) STC CV29502Wj540E STC (CV160l) 3B26 USA CV3575 3Q4 USA CV8182Wj541E STC' STC

3Q5G USA3B28 USA CV1835 Cossor

2XP Cossor Mullard 3Q5GT USA CV8192X2 US CV3748 3B29 USA CV3689 STC2X2j897 RCA CV3748 3BjlOO-B STC (CV1689) Cossor2X2A US CV597 3B/I02-B STC (CV84) 3Q5GTjG USA CV8192X/I01G STC 3B/I04J STC Ferranti

62

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Type Maker or cv No. Type Maker or CV No. Type Maker or CV No.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearest


3Q/120G STC (CV1605) 4C21 RCA CV2576 5B/150B STC3Q/150E STC CV1450 4C22 USA CV2987 5B/151A STC (CV1080)3Q/151G STC 4C27 USA (CV92) 5B/250A STC (CV124)3Q/180E STC (CV1603) 4C30 USA CV933 5B/251M STC (CV428)3Q/181E STC (CV1600) 4C35 USA CV1787 5B/252M STC (CV391)

Mullard3Q/184E STC 5B/253M STC (CV499)3Q/191E STC (CV570) 4C/100A STC CV2756 5B/254M STC (CV428)3Q/195E STC (CV570) 4C/800E STC 5B/255M STC (CV391)3Q/200A STC 4D1 STC (CV1109) 5B/256M STC (CV499)3Q/211E STC (CV1604) 4D21 USA ~~'5(CV~) 5B/257M STC (CV2220)

4D32 USA CV35~3Q/212E STC CV1797 (0) ~7

Cct;z. c v'~ 5B/258M STC c.V;J..'3C1--'3Q/213E STC (CV1734) 4 27 USA CV824 5B/300B STC CV8343Q/220E STC 4G/280K STC (CV797) 5B/502A STC (CVI096)3Q/221E STC 4G/401A STC 5B/600A STC (CVI081)3Q/260E STC (CV446) 4H/135M STC CV25l9 5B/700A STC (CV631) ,

4H/180E STC3Q/290E STC 5C22 USA (CV2520)3Q/293E STC (CV1447) 4131 USA~ CV1914 Mullard3Q/310E STC 4J33 USA L:::~\/ CV1916 5C/lOOA STC (CV26)3Q/330E STC 4134 USA ciEl/ CV1897 5C/I0lA STC (CV1372)3Q/331E STC 4135 USA tZV CV1898 5C/450A STC (CV1506)

4J42 ' USA (i£(/Co I $'C'I~

5CPl USA CV6003RB2A Cintel q..,.";iA U", ('r3RB3A Cintel 4J50 USA eB\I (CV2284) 5CPIA USA (CV2191)3S4 USA (CV820) Philips 5CP7' USA CV838

ET 4J52 USA CV3569 5D21 USA (C~STC 4J53 USA ~t:.~1/ CV513 5D22 USA (C Z9tFerranti

c../ It 'J1.>4PR60A USA CV2752 5D/l00A STC (CV1627)

3V4 USA 4Q/230A(o) STC '!>{CFI, J~~ C V ~07(j

STC 5FP7 (Spec) USA CV1789,3~280B STC 4SH Cossor (CV1126) 5FP7 USA CV718.~ t'~C>ft $'1""'c.. c (/ t;;u.ry 4SHA Cossor CV825 5FP7A USA C{~~'1

3V 281B STC 4THA Cossor CV826 5GPl USA CV8393V/340B STC 4TP Cossor 5HPl USA CV35833V/420B STC (CV2126) 4TPB (clear) Cossor CV8283V/490A STC 5HPIA USA CV35833V/500A STC c (/ b,.U1~

4TPB (Met) Cossor CV829 5HP4 USA} v!-&'ic"'} src- 4TSA Cossor 5H4 USA CV8403V/530E STC (CV447) 4TSP Cossor CV830 5JP1 USA CV17913V/531E STC 4XP Cossor (CV1168) 5123 USA CV5423V/560E . STC 4X150A USA CV25193V/561E STC STC3V/590E STC

CV38935J26 USA t3..LV CV3602

4X150G USA 5J29 USA CV3-6e6 -;J3XI00N STC 4100BU Cossor 5130 USA CV3698 ~f3XI01N STC 5APl USA CV832 5132 USA c:: iJ 1~-7k3X300N STC 5APl/1805Pl USA CV832 5J/180E STC (CV445)3X30lN STC 5A6 USA (: v;z.:"foo3X302N STC ~f/ pt' I V~IT c.v ~6<

5A/I02A STC CV3784 5LPl USA CV74J3/8G BTH 5A/I02D STC ~CVI724) 5L/444 Osram CV3114-01CAHA GEC 5A/I05A(0) STC CV1726) GEC4-08CAHA GEC 5A/116B STC 5MPl . USA CV7404-65A USA CV1905 5A/117B STC 5R4GY USA (CV717)4/125A Eimac (C, 5A/128B STC (CV244)

STC5R4WGA USA

(CV2~j~5A/136A STC CV2619

4/250A Eimac 5A/136D STC (CV245)4-4OOA USA CV3879 5A/150A STC 5R4WGY USA CV28354-1000A USA CV3880 5A/152G STC 5TOIA~ Cin-Tel CV18684Al USA CV821

5A/152M STC5T4 RCA CV1846

4A/137B STC (CV243) 5T4G STC5A/155M STC Tungsram.. 5A/156M STC 5UP7 USA CV2840

4B22 . USA CV2936, 5A/157D STC (CV358)4B24 USA CV822 5A/159N STC (CV2000)4B26 USA CVl836

5A/163K STC C'/ltH, 5U4G USA (CV575)

4B28 USA CV2777 Cossor4B30 USA CV934 SA/I64K STC CV3536 STC

5BPl/1802Pl RCA CV601 ' '

Ferranti5BPI USA CV601 Tungsram

4B31 USA CV3510 5BPIA USA 5U4GT RCA (CV841) ,

4B32 USA CV2518 ',

5V4G USA CV729Mullard SBP4/t"802P4 RCA CV836 Ferranti

4B35 USA CV926 5BI STC (CV1018) STC4B/700A STC, 5B/100A STC (CV1369) . 5W4 RCA CVl8494CSUA Cossor (CV1267) 5B/ll0G STC 5W4G RCA CV842

5B 110M STC

22390 63' E2

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Type Maker or CV No. Type Maker or

ICV No. Type Maker or CV No.


SW4GT RCA CVS03 6AK7 USA CV1784 6BF7 USA CV3894SX4 USA CV18S2 6AK8 Mullard 6BG6G USA C.V1'1~SX4G USA CV18S1 Philips STC

STC 6ALS USA CV283 6BH5 MullardTungsram 6AL5 STC (CV283) Philips

5Y3G USA CV1854 ET 6BH6 USA\

,STC Tungsram STC

e::: V ;''1.r'jCossor Ferranti 6BJ6 USAFerranti 6AL5W USA CV2882 STCTungsram '~M4 USA c: HO'1\

5Y3GT USA CV18S6 .6AL7Gj USA CV3707 C,sti (}SI'r Cv (()'!>~

Tungsram 6AM5 ET (CV136) 6BL USA CV3614STC STC 6BM6 USA CV3615

6AM6 ET (CVI38) 6BN6 USA CV3616SY3WGT USA STC 6BR7 STC (CV213~5Y3WGTA USA CV4027 6ANS USA CV2854 6BS7 STC e t/ ~~<1 ,

5Y3WGTB USA 6AN7 Mullard lJSG..C,~ ()SI'I cv 'cllfO5Y3GT/G USA CV1856 Philips5Y4G USA CV1857 6BW6 STC (CV2136)

6BW7 STCSZ3 USA CV1861 6AQ4 Mullard 6BX6 Mullard

STC 6AQ5 USA CV1862 PhilipsTungsram STC ET

SZ4 USA CV1864 6AQ5W USA CV2883 6BY7 MullardFerranti 6AQ6 USA CV2937 PhilipsSTC 6AR6 USA CV3613 6B4G USA CV8S1

5Z4G USA (CV1863) STCsrcCossor 6AS6 USA CV2522Tungsram 6AS6W USA CV2884 6B5 USA CV1885Ferranti 6AS7G USA CV2523 STC

5Z4GT USA (CV2748) 6AT6 USA (CV452) 6B6G USA CVI887Cossor STC STCMullard 6AUS USA ~ 6B7 USA (CVI891)

6AB5 USA CV843 STCCRv7 12.'/';0;2 Tungsram

6AB5/6N5 USA CV843 6AU6 USA CV2524 Ferranti6AB7 USA CVI873 STC 6B7E Cossor

Ferranti 6AU6WA USA CV4023 STCCossor 6AV6 USA CV2526 6B8 USA CV1894

6AB7/I853 USA CV1873 6AX6 USA Ferranti6AB8 Mullard 6A3 USA CV730

Philips STC .ET 6B8EG Cossor

6AC5G RCA CV844 , 6B8G USA CV18936A4 USA Ferranti6A6 USA CV1867 STC

6AC5GT RCA CV845 STC Cossor6AC7 USA CV660 Ferranti Tungsram

Ferranti 6A7 USA CV1870 6B8GT USA6AC7/1852 RCA CV660 STC STC6AD7G RCA CVI878 Tungsram 6B8SG6AD8 Mullard 6A7E Cossor 6CD6G USA

{,11;:'41'1-Philips C:V'id7 'f- STC STC\}>11 6A7G RCA ~

~4tC"fl. t/St't (' v'i"o')(,6AE Mazda 6CH6 STC (CV2127) C6AE7 Cossor 6A8 USA CV579 6CK6 Mullard CV27266AF6G RCA CV847 6A8EG Cossor Philips6AGS USA CV848 6A8G USA CV578 6CJ6 ,Mullard (CV2721)6AG6G USA (CVI438) Ferranti Philips

STC . STC 6CK6 Philips CV2726Tungsram 6CN6 Mullard

6A8GT USA CV5806AG7 RCA CV1882 STC6AH6 USA CV252I Ferranti 6CQ6 Mazda (CV131)6AJ4 USA Tungsram 6C4. USA (CVI33)6AJ7/6AC7 USA CV849 6BA6 USA (CV454) Hivac6AJ7 USA CV849 STC STC

"t3>A(, \J '\J<,;.~ cv~'7 Tungsramt be-If. us"t Cl) (o",f 6C4W USA CV2842

6AJ8 Mullard (CV2I28) 6BA4 USA 6C5 USA CV582Philips 6BA7 USA CV2527 Ferranti

6AK' USA (CVS50) 6BD7 Mullard CossorFerranti Philips 6CSG USA CV581

6AK5W USA CV2877 6BE6 USA (CV453) Ferranti'6AK5WA USA STC STC6AK6 USA CVI762 6BE7 Mullard Cossor

1STC Philips Tungsram

i

64

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6C5GT USA CV583 6F32 Mazda (CV1116) MullardFerranti 6F33 Mazda (CV329) STCCossor 6G5G USA FerrantiTungsram STC 6K7GT ~ USA (CVI943)

6C5GTjG USA CV583 Tungsram Ferranti6C6 USA CV585 6G6G USA CV1926 STC

STC Ferranti TungsramTungsram (CVl710) 6G8G RCA CV856 Cossor

CV1945Ferranti 6K8 USACossor 6H6 USA CV1930 Cossor

6C7 USA CV854 Cossor Ferranti6C8G USA CV1896 Ferranti 6K8G USA (CVI944)

t.Cl-t. 6H6G USA CV1929 STCcJStt C If ~o{:l Ferranti Ferranti

6C9 Mazda STC Tungsram6ClO Mazda Tungsram 6K8GT USA CV19466C21 USA CV855 6H6GT USA CV1931 STC6C31 Mazda Ferranti Ferranti601 Mazda STC Tungsram

Cossor 6K25 Mazda (CV2217)6H6GTjG USA CV1931

602 Mazda (CV140) 6J4 USA CV1763 6L03 Mazda (CV3882)604 USA CV1949 GS4w14 Cv~ 6L020 Mazda CVI920'

EEV 6L5G RCA CV862606 USA CV1900 6J5 USA CV1933 6L6 USA CV1948

STC Ferranti FerrantiTungsram Cossor CossorFerranti 6J5G USA (CVI932) 6L6G USA (CVI947)Cossor Cossor STC

607 RCA CVl776 MuIlard Tungsram608G ·RCA CV1902 STC Ferranti

Tungsram CossorFerranti

6EG4 Cin Tel· 6J5GT USA (CVI934) 6L6GA USA CV28176EG5 Cin Tel Ferranti Tungsram6E5 USA CV1906 STC 6L6WGA USA CV36186E8G USA Cossor 6L6WGB USA CV2796

Tungsram Tungsram 6L7 USA CV19516Fl Mazda CV3841 6J5GTjG USA (CV1934) Cossor

6J6 USA (CV858) 6L7G USA CV1950STC

6F4 ~ Mazda CV2939 Tungsram6F5 RCA CV1909 6J6W. USA CV2843

STC r 6J7 USA CV1936 6L18 Mazda CV18996F5G 1 USA CV1908 Ferranti 6L19 Mazda CV18506F5GT RCA CVl9l0 Cossor 6L34 Mazda (CV417)6F6 USA CV1912 6J7G USA (CVl935) 6Ml Mazda

Ferranti Ferranti 6M5 MuIlardSTC PhilipsCossor

6F6EG Cossor Tungsram6F6G USA (CVI91l) 6J7GT USA (CVI937) 6M6G USA

STC Ferranti TungsramCossor Tungsram 6N5 USA CV843Ferranti STC 6N6 USA CV1954Tungsram 6J8G USA CV859 6N6G USA CV1953

6F6GT USA CV731 Tungsram STC6F6GTjG USA CV731 6N7 USA CV19576F7 USA CV1915 Ferranti

STC 6K4 USA CV28556KSG USA CV860

STC 6N7G USA CV1956,6F7B Cossor 6K5GT USA CV861 STCSTC 6K5GTjG' USA CV861

6N7GT USA CV19S86F7E STC 6K6G USA CV1938 Ferranti6F8 USA CV1918 Ferranti STC... Cossor STCFerranti 6N8 MuIlard

6F8G USA CV1917 Philips

Ferranti 6K6GT CV1940 6P5GT/G RCA CV1819USA 6P7G RCA CV864Cossor Ferranti

6Fll Mazda CV1901 6K6GTjG USA CV19406K7 USA CV1942

STCFerranti 6P8G6F12 Mazda (CV138) Cossor 6P25 Mazda CV18536F13 Mazda CV1839 6K7EG RCA 6P28 Mazda6F14 Mazda CVl919 6K7G USA (CVI94l) 6Q4 MuIlard CV18866Fl5 Mazda Tungsram Philips6Fl7 Mazda (CV416) Cossor 6Q5G USA CV1815

65

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Type Maker or CYNo. Type Maker or CYNo. Type Maker or CYNo., ,Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or' nearest

in brackets)6~~j;;.7''''q.'(

in brackets) in brackets)F'.,.., ...-r.~'

6Q6G USA - 6SL7GT USA CVi985 6X5G USA (CV572)Tungsram Ferranti STC

6Q7 USA CV588 STC Ferranti6Q7G USA (CV587) Cossor Cossor

Cossor 6SN7W USA TungsramBrimar 6SN7GT USA (CV1988) 6X5GT USA (CV574)Tungsram STC STCFerranti Tungsram FerrantiSTC Ferranti Cossor

6Q7GT USA (CV589) Cossor 6X5GT/G USA (CV574)Ferranti 6SN7WGT USA CV3627 6X5WGT USA CV3734STC 6SQ7 USA CV1990 6Y3G Canadian CV1816Tungsram FerrantiCossor STC 6Y6G USA CV51S

6R4 Mullard CV1865 Cossor FerrantiCossor

6SQ7GT USA CV1991 6ZY5G USA CV873Ferranti STC

Philips Tungsram 6Z4' . USA CV619.6R6G USA CV1960 6SQ7GT/G USA CV1991 6Z5 USA CV8716R7 USA CV1963 6SR7 . USA CV867 6Z7G USA CV872

,6R7G USA CV1962 6SS7 USA CV1993STC Ferranti 7 USA CV874Ferranti Cossor 7AN7/PCC84 STCTungsram 6ST7 . USA CV1996 7A USA CV823

6R7GT USA CV1964 MJS 7A2 STC (CV1174)6R7GT/G USA CV1964 USA CV1995 7A3 STC (CV118l)

! 6S7 USA CV19756S7G USA CV1974 7A4 USA CVl7706TH8G Tungsram 7A6 USA CV876

6SA7 USA CV1966 6T4 USA CV3808 7A7 : USA CV877STC STCFerranti 6T7G . USA CV500 FerrantiCossor 6T8 STC 7A7E

6SA7GT USA CV1967 6U3 Mullard 7A7LM USA CV8776SA7GTjG USA CV1967 Philips ' .: (

6SC7 USA CV1969 6U4GT USA 7A8E6SC7GT USA CV1970 STC 7A8 USA CV878

6U5/6G5 USA CV504 STCSTC 7B CV824

~~Tungsram Cv?'OC(, 7BP7 USA CV884

6SD7GT USA CV865 US'" 7BP7A USA ~ CV36376SF5 USA CV1972 .'V1t'1 ())~ ((J5°~ ;

6SF5GT USA CV1973 6U5G STC (CV2747) 7B4 USA CV8796SG7 USA CV1978 Tungsram 7B5 USA CV880

Ferranti 6U7G USA CV706 STCSTC STC 7B5E STC (CV880)

6SH7 USA CV594 Ferranti 7B5LT RCA CV881Ferranti , Tungsram 7B6 USA CV882·STC 6V4 Mullard STCCossor Philips Ferranti

6V6 USA CV510Ferranti 7B6LM USA CV882

f'9H?1- us 11 C:f/~b7 Cossor 7B7 USA CV5226SH7GT USA CV595 6V6G USA (CV509) STC, ' Ferra,nti Cossor ET6~J7 . Ferranti FerrantiUSA CV591 STC 7B8 USA CV883STC

Ferranti Tungsram STCCossor 7B8LM USA CV883

6S17G USA CV590 7C4/1203A RCA CV27066817G1' USA CV592 6V6GT USA (CV511)

Ferranti Ferranti 7C5 USA CV88,5Tungsram STC Ferranti

6S17WGT USA CV3619 Tungsram STCCossor ET

6V6GTjG USA (CV51l) 7C5LT RCA CV8866V7G USA CV870 7C6 USA CV887

'6S17Y CV866,,')Q(6W2 ET ,,,:,'\ , STC

RCA 6W7G U:SA CV512 ET6SK7 USA CV1981 'Perranti

Ferranti /' 7C7 , USA CV1777STC 6X2 Mullard (CV426) STC

6SK7GT USA CV1982 Philips 7D3 STCPerranti 6X4 ,USA (CV493) -- .

\ Tungsram STC 7D5,', STC CV1425Cossor 6X4W USA CV2844 7D6 STC (CV1672)

6SK7GTjG USA CV1982 6X4WA USA 708 STC CV889__6SK8 Cossor 6X5 RCA CV573 7D8S' STC (CV1328)7D9 STC (CV136) __

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7D10 STC (CV2127) 9MW5AX Cin Tel (CV2192) 12E1 Mazda (CV345)7E5 USA CV2704 9PK5 EMI (CV109) 12FP7 USA CV9157E5/1201 USA CV2704 9V8/PCF82 STC 12H6 RCA CV9167E6 USA CV891 10 RCA CV603 12J5 ReA CV5347E7 USA CV892 Tungsram 12J5GT USA CV535

10 (Special) RCA CV906 Cossor7F7 USA CV893 Ferranti

STC lOCI Mazda Tungsram7F8 USA CV2968 10D Cossor7G7 USA CV894 IOD1 STC (CV1300) 1217GT USA CV9177G7/1232 USA CV894 10F1 Mazda Ferranti I

7H7 USA CV895 IOF3 Mazda STCFerranti Tungsram

CV917STC IOF9 Mazda 1217GT/G USAET IOKP7 I USA CV3693 12K7GT USA CV918

1OLD3 Mazda Ferranti717 USA CV897 IOLDll Mazda STC7K7 USA CV896 10P13 Mazda Tungsram

STC 12K7GT/G USA CV918Ferranti 10P14 Mazda 12K8 USA CV703

7MB1A Cin Tel (CV1880) 10Y USA (CV603) Ferranti·7N7 USA CV898 llA2 STC (CV2813)

CV3'1;l.7Cossor 11D3 STC CV1419 12K8GT USASTC llD5 STC Ferranti

7Q7 USA CV899 STCFerranti llE1 Mazda TungsramCossor llE2 Mazda (CV276) 12L01A Cin-Tel (CV2162)

llE3 Mazda (CV73) 12Q7GT USA

7R7 USA CV900 12A/112A ;RCA CVl774 Ferranti

Ferranti 12AH7 Ferranti STC

STC " Tungsram

7S7 USA 12SA7 USA CV537

Ferranti 12AH7GT USA CV529 Cossor

STC Ferranti 12S

ET 12AH8 STC7UP7 USA CV3639 12AT6 USA 12SA7GT USA CV538

7W7 USA CV902 STC Tungsram

7Y4 USA CV901 12AT7 USA (CV455) 12SC7 USA CV540

Ferranti STC Ferranti

STC ET 12SC7G Cossor

ET 12AT7WA USA (CV4024) 12SF5 RCA CV919.7'(1')... 11>11- f't/ sx" ~.

12SF5GT RCA CV920

7Z4 USA CV1790 12AU6 USA CV1961 12SF7 RCA CV921Ferranti STC 12SG7 USA CV694STC 12AU7 USA (CV49l) CossorCossor STC Ferranti

8AI STC (CV1282) Hivac 12SH7 USA CV9228A3 W Electric CV3813 12AX7 USA (CV492) Ferranti8D2 STC (CV1108) STC 12SH7GT USA CV36518D3 STC (CV138) 12AY7 USA CV3650 Ferranti

12A5 RCA CV908 12SJ7 USA CV697Ferranti

8D4 STC STC8D5 STC (CV2135) 12A6 USA CV5258D6 STC Ferranti 12S17GT USA CV6988D7 STC STC Ferranti9-3 (CV368) 12A6GT RCA CV526 Tungsram

12A,7 USA CV909 12SK7 USA CV543STC Ferranti

9AI STC (CV1172) 12A8GT RCA CV910 STC9BW6 STC 12A8GT/G RCA CV910 Cossor9DI

. 12SK7GT USA CV5449D2 STC (CV1106) Ferranti9D5 STC (CV1053) 12BA6 USA (CV1928) Tungsram

STC 12SK7GT/G USA CV54412BE6 USA 12SL7GT RCA CV924

9D6 STC (CV131) STC \

9HP7 USA CV905 12BH7 STC c v )lJlJ.2.. 12SN7GT USA CV9259JP1 USA CV1783 12BY7 STC9LD1 Cin Tel 12B8GT RCA CV911 Ferranti9L01 Cin Tel 12SQ7 USA CV546

Ferranti

9LOIA12C8 USA CV531 STC

Cin Tel (CV464) Ferranti Cossor9LP7 USA CV2789 12C8 (Special) USA CV837 12SQ7GT USA CV5479MD6 Cin Tel (CV262) 12C8GT STC CV3827 Ferranti9M06A Cin Tel (CV2108) 12DP7 USA CV913 Tungsram9MW5A Cin Tel 12DP8 USA CV914 12SQ7GT/G USA CV547

12SP7 USA CV3655

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12SR7 USA CV700 18K Cossor 25A6GTjG USA CV550Ferranti 19 USA 25B6G USA CV939STC Cossor 25A7G USA

12SW7 USA CV3666 STC STC12SX7GT USA CV3697 Tungsram 25A7GTjG USA CV93712SY7 USA CV3668 19AQ5 STC 25B8GT USA CV94012TOIA Cin-Tel CV1869 19BGSG USA STC

(' 1/ .2.:~;lYSTC

12T03A Cin-Tel 19E2 Mazda (CV265) 25L6 USA CV55212XP4 ET 25L6G USA CV55112Y4 Canadian CV523 19G3 Mazda (CV277) Ferranti12Z3 RCA CV927 19G6 Mazda (CV37l) Tungsram

STC' 19H1 Mazda (CVI21) 25L6GT USA CV553Mullard 19H4 Mazda (CV2180) STC

BD1 STC (CV423) 19H5 Mazda (CV490) Tungsram25L6GTjG USA CV553

13D3 STC (CV2212) 19J Cossor 25RE STC13J Cossor 19T8 STC Cossor13PA Cossor 19X3 ET13SPA Cossor CV929 19Y3 ET 25SN7GT STC (CV423)13VPA Cossor (CV1106) 20Al STC CV1424 25T Eimac CV941

CV"f1<t,(25TG Eimac CV789

14A7 USA 20A2 Mazda CV1848 25U4GT STCFerranti 20A3 Mazda (CV797) 25Y5 USA

14B6 USA 20AV Mullard STC CV942STC 20CG Mullard MullardFerranti 20CV Mullard

14D Cossor 25Y5G Tungsram14F7 USA CV930 20D Cossor 25Z4G STC14H7 USA 20Dl Mazda Tungsram

ET 20D2 STC CossorSTC 20D3 STC 25Z5 USAFerranti 20F2 Mazda STC CV555

Cossor14KP4 ET 20J Cossor Tungsram14KP4A ET 20K' Cossor (CV954) 25Z6 USA CV55814K7 STC (CV1379) 25Z6G STC14L Cossor (CVI087) 20Pl Mazda Tungsram14R7 USA cJ":1q~7 20P2 Mazda

STC 20P3 Mazda 25Z6GT USA CV559Tungsram

cv~<f,"20P4 Mazda 25Z6GTjG USA CV559

14S7 USA 21A6 Mullard 26 USA CV943STC Philips 26A7GT USA CV3571ET ET 26D Cossor CV2727Ferranti 21K Cossor U2s'"iJ (I~11 cV (o3d

15 RCA CV931 21/2 USA CV3584STC 21A6jPL81 STC 26J Cossor CV2786Cossor 27 USA CV944

15A Siemens (CV986) STC15A2 STC (CV3576) 22/11BXA MOV (CV439) Cossor15A6 Mullard 22J Cossor MulIard

Philips 22Sj101G STC Tungsram22Sj200A STC CV1451 27J Cossor22Vj310A STC 27Ml Mazda (CV337)

15B Siemens (CV326) 27M2 Mazda CI5bS{15Dl STC (CV2956)15D2 STC (CV1107) 23D Cossor (CVI588)15EP4 ET (CV1382) 27M3 Mazda15E USA CV933 24 USA 27SU ET

STC 2824A USA CV936 28D7 USA CV945

15LOIA Cin-Tel CV1744 STC 28D7GTjG USA CV94615R USA CV934 Tungsram16A5 Mullard 24Bl Mazda

Philips 24B2 Mazda (CV339) 29Cl Mazda (CV430)17ARP4 Marconi- 29D Cossor CV2728

phone 29D2 Mazda17ASP4 ET 24C3 Mazda 30 USA CV604

25AC5GTjG USA CV938 Cossor25A6 USA CV549 STC

17E7 STC 30 Twin Eimac CV178017Z3 Mullard Cossor So~{t?"\ tfIJ I Sv.41-A! ()V(O~

Philips MulIardET 25A6G USA 30BIPl Mazda

18 USA STC 30C2 MazdaTungsram I Cossor 30C4 Mazda

18E Cossor Tungsram 30C8 Mazda (CV987)18J Cossor 25A6GT USA CV550 30C12Pl Mazda CV1746

-- _..-'

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30D5 Mazda CVI860l~ 35/51 USA CV1752 43CED Met. Vick30E7 Mazda 36 USA 43D Cossor30E8Pl Mazda (CV2216) Cossor CV1775 43E Cossor30HM/HD (CV1140) Mullard STC CV251431 RCA CV947 STC 43J Cossor

36E Cossor 43IU Co\sor (CV1039)36G Cossor

32 USA CV711 . 36J Cossor 44Aj160M STC (CV415)STC

32 Cossor (CV711)44lU Cossor (CV1039)

32A Cossor (CV95l) 37 USA CV606 44J Cossor

32D CossorSTC 44K Cossor

32E Cossor (CV957)Cossor 45 RCAMullard Cossor CV610

38 USA CV712 STC38 Cossor (CV712) Tungsram

32E USA (CV71!) 38A USA CV712STC 38E 45D Cossor

32G Cossor (CV953)32J Cossor (CV958) 39J Cossor 45DS Cossor CV2528

32L7GT USA CV948 39/44 USA45IU Cossor CV2529

STC STC CVI771 45J Cossor

33 USA CV949 39/44E Cossor 45SP RCA CV596

Tungsram 40 USA CV2501 45Z5GT RCA CV253040SUA Cossor (CVI267) 46 RCA CV2531

33A/I00A STC CV1750 40TZ46D Cossor

33A/138A STC (CV18) 40Z5 USA CV253047 USA

33A/158M STC (CVI884) 40Z5GT USA CV2530STC CVI772.

34 USA CV1751 41 USATungsram

34E STC (CV175l) STC CV60847E STC

41DS (CV1131)Cossor

34E Cossor 47K Cossor

35 USA CV1752 41E STC 48K Cossor

Tungsram 41FP Cossor CV2502 49 RCA CV2532

Cossor 41IU Cossor 49J Cossor

Mullard 41MDG Cossor 49J Cossor

35A5 USA 41ME CossorSTC 50 USA CV2533

Ferranti Tungsram

ET 41MH Cossor (CV2503) 50A5 USA

35A5LT USA CV1753 41MHF Cossor (CVI037) Ferranti

35L6 USA CV561 41MHL Cossor CV2504 50CD6G STC41MLF Cossor (CVI038) 50C5 USA (CVI959)41MP Cossor (CVI458) STC

35L6G USA 50D Cossor

Ferranti41MPG Cossor35L6GT USA CV2505

Ferranti CV562 41MPT Cossor CV2506 50L6G USA CV2534 (0)

STC 41MRC Cossor FerrantiTungsram 41MSG Cossor 50L6GT USA CV571

35L6GT/G USA CV562 41MTA Cossor STC

35RE Cossor TungsramSTC 50Y6GT USA CV805

35T Eimac CV668 41MTB Cossor 50Y6GT/G USA CV805

MOV 41MTL Cossor (CVI117) 51 EMI (CV487)41MTS Cossor41MXP Cossor (CVI122)

35TG Eimac CV1754 41PGD Cossor 51 USA35W4 USA Tungsram

STC 51CG MuIIard35Y4 USA 41STH Cossor (CV2508) 52CG Mullard CV2896

Ferranti 42 USA 52KU Cossor (CVI86~)

35Z3 USA Ferranti CV609 53 USA CV2535STC CV564 STCFerranti TungsramET 42E Cossor 53A· USA. CV2536

35Z3GT USA CV565 STC CV609 53KU ET (CV378)42MP/PEN Cossor (CV1181) 54KU Cossor (CV729)'42MPT Cossor (CV1325) 54NCPll USA CV2885

35Z3LT USA CV726 55 USA CV2537.35Z4GT USA

Ferranti CV2500 420T Cossor CV2511Ct/tJo~-

STC 420TDD Cossor CV2512 55CG MullardTungsram 42Pay Cossor 56 USA CV611

35Z5 USA CV567 42SPT Cossor CV1444 Tungsram35Z5GT USA CV568 43 USA 56CG Mullard

Tungsram STC CV2514 57 USA CV61235Z5GT/G USA CV568 Tungsram Tungsram

57CV Mullard '

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Type Maker or cv No. Type Maker or . CV No. Type Maker or CV No.Desianation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearest


58 USA CV613 81 RCA CV2546 154V Mullard (CV1037)Tungsrarn Tungsram 161 GEC CV708

58CG MulIard 82 RCA CVI773 164V MulIard CV256258CV Mullard 83 RCA CV618 171K Cossor58M Tungsrarn STC 185BT Cossor CV198059 USA CV2538 83V RCA CV2547

84 RCA (CV2548) 200 USA CV2988(0)59A3 USA (CV2692) Cossor 202 (CVI200)59A4 USA (CV2692) 202DDT Cossor59G Cossor 84/6Z4 RCA CV619 202STH- Cossor59J , Cossor STC 202VP Cossor61BT Cossor CV1979 85 RCA CV2549~(SPr CO'>fo(L C.r~~?( Cossor 202VPB Cossor61P Cossor . CV2539· STC 203A USA61SPT Cossor 85Al Mullard (CV43l) 203B USA CV298662BT ET CV1745 85A2 Mullard (CV449) 203THA Cossor63D Cossoi CV2540 88D Cossor (CV2185) 204A USA CV256363DS Cosser CV2731 '88J Cossor 205D USA CV174963ME Cossor 88L Cossor 205E W.EIectric CV2566

89 USA CV833 205F W.EIectric CV256763SPT Cossor (CV1091) 89D Cossor (CV2193) 206P7 Cossor64ME Cossor64SU Cossor (CV13S) 89J Cossor CV2750 210DDT Cossor (CV1044)65K Cossor 89Y USA CV833 21ODET(0) Cossor CV2569

90A/G Mullard (CV2270) 210DG Cossor70Bl Mullard1... (CV470) 90A/V Mullard (CV2132) 210DGB Cossor

90C/G Mullard (CV2133) 210HF Cossor CV257070L7GT STC 90C/V Mullard (CV2134) 210HL Cossor CV257171A USA CV254171A3 USA (CVI764) 90Cl Mullard 210LF Cossor (CV102l)711 Cossor 90EG4 Cin Tel (CVI587) 210PG Cossor (CV1043)

100Bl Mullard (CVI199) 210PGA Cossor

72 USA CV709100El Mullard 2l0RC Cossor CV2977

72R Raytheon CV709100R CV2967 2l0SPT Cossor (CV1049)

73 USA CV2543 100TH Eimac CV2552 210VPA Cossor CV257473J Cossor 10lD USA CV1778 210VPT Cossor (CV1083)73R Raytheon CV2543 101F USA CV2553 211 RCA CV620102D USA CVI779 211 (Spec~aI) RCA CV2576

74K Cossorl04V Mullard (CVI161) 2l2E W.EIectric CV2577

75 RCA 105Bl MulIard 215P Cossor (CVlO19)Cossor CV6l4 108Cl Mullard (CV1833) 215SG Cossor (CV1018)STC IlIA USA CV2554 218 RCA CV2579Tungsrarn 112 USA 220B Cossor (CVl032)76 USA Tungsram 220C Fed Union CV2580STC CV615 l12A USA CVl774

76]Tungsrarn 220HPT Cossor (CV1118)Cossor 114A} 220IPT Cossor (CV1333)

76K Cossor 114B CV3505 220LF Cossor (CV1313)116Pen Cossor (CV1337) 220LPT Cossor (CV1195)

77117L7GT USA CV2556 220/0T Cossor (CVI118)

USA 117N7GT RCA CV2557STC CV616 STC' 220P Cossor (CVl020)Ferranti 220PA Cossor (CVl022)

17ETungsrarn 220PT Cossor (CVl051)STC 117P7GT USA 220RC Cossor (CV1312)Cossor STC 220SG Cossor (CV1018)

78 USA 117Z3 USASTC CV2544 STC 220TH Cossor (CV1082)Ferranti Il7Z6GT RCA CV2558 220VPT Cossor

'. Tungsrarn STC 220VS. Cossor CV258278DS STC (CVI328) l17Z6GT/G RCA CV2558 220VSG Cossor (CV1028)78E STC l2lA USA CV2560 225DU Cossor CV1454

Cossor

121K Cossor 228A W.EIectric CV73479 RCA CV254S(o) l22A USA CV2561 230/HPT Cossor

Cossor l29B Fed Union CV2950 230XP Cossor (CV1023)STC .142BT Cossor 231D W.EIectric CV2584

790 Cossor 143D USA CV597 239 US1\. CV177l79] Cossor80 USA

STC CV617 l50A2 MulIard 240B Cossor CV2586Tungsrarn l50Bl Mullard 240QP Cossor . (CVl035)Ferranti 150B2 Mullard ~CV2225) 242C W.Electric CV2587Cossor 150C2 MulIard CV1832) 244A .W.EIectric CV2588

80A Tungsrarn 152RA USA CV3878 244V Mullard (CVI038)Cri I ,4 USA cV·<)6~O

70

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Type Maker or cv No. Type Maker or cv No. Type Maker or CV No.'Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearest


250TH Eimac CV2589 375A USA CV2636 707B W.Electric CV1768256B W.Electric CV2592 388A USA CV2637 708A W.Electric CV3590257A W.Electric CV2593 393A USA CV2638 709A W.Electric CV2652258B Taylor CV2594 Ferranti 710A W.Electric (CV62)259A W.Electric CV2595 394A USA CV2639 713A W.Electric CV3593

401CAHA GEC (CV389)262A W.Electric CV2597 \ 714AY W.Electric CV2653262B W.Electric CV2597 402CAHA GEC 715A USA CV2654264A W.Electric CV2598 402Pen Cossor (CV1672) 715B USA CV2655264C W.Electric CV2599 402PenA Cossor 715C USA CV598267B W.Electric CV2600 405BU Cossor CV2640 717A W.Electric CV3594

. 408BU Cossor270A W.Electric (CV30) 720C W.Electric CV3907271A W.Electric CV2601 408CAHA GEC (CV221l) 721A W.Electric CV3595272A W.Electric CV2602 410LF Cossor (CVl152) 721B W.Electric274A W.Electric CV2603 410PT Cossor (CV1167) 722A W.Electric CV3596274B W.Electric CV684 410SG Cossor 723A W.Electric CV720

.412SU Cossor275A W.Electric CV2604 723A/B W.Electric CV1795279A W.Electric CV669 415PT Cossor 724A W.Electric CV2656282A W.Electric CV2605 415XP Cossor (CV1154) 724B W.Electric CV1793293A W.Electric CV3829 416A .USA 725A W.Electric CV722300A W.Electric CV2608 417A Westing- CV2642 726A W.Electric CV676

house300B W.Electric CV2609 419A 726B W.Electric CV3597301 GEC 726C W.Electric CV3644302 GEC 419CAHA GEC 729A USA (CV539)302THA Cossor 420XP Cossor (CV1040) 731A W.Electric (CV85Q)303 GEC CV2610 421CAHA GEC 732A W.Electric CV812

425XP Cossor (CV1655)303A USA CV2986 428T USA CV812 rungsram CV2657304 GEC (CV1202) 800 ReA304TH USA CV2611 440XP Cossor Cossor304TL USA CV3580 442BU Cossor (CV1796) STC307A W.Electric eV2612 446 USA CV3725 801 USA CV621

446A USA CV932 801A USA CV621310A W.Electric CV2613 446B USA CV687 801A/801 USA .CV621310B W.Electric CV1781 l.J.fl)"IL lJS,4 cV';o17 802 RCA CV622311A W.Electric CV2614 450TH USA CV2572313C W.Electric CV2615 460BU Cossor CV2644 803 RCA CV623314A W.Electric CV2616 464A USA CV688 804 RCA CV624

471A USA CV3586 805 RCA CV625316A W.Electric CV683 484V Mullard (CV1678) 806 RCA CV2658322A W.Electric CV623 rSA (CV124)323A W.Electric CV2617 496CAHA GEe 807 Cossor327A W.Electric CV926 506BU Cossor CV2645 Tungsram327A USA CV2618 506K Mullard STC

522 USA eV999328A W.Electric CV2619 532 Westing- CV2647 807W USA CV3809329A W.Electric CV2620 house 808 RCA CV626330B W.Electric CV2621 809 RCA CV2660331A W.Electric CV2622 810 RCA CV627332A W.Electric CV2623 532A Westing- CV2648 ftll RCA CV628

house (lA USA- ~v?~,.

332Pen Cossor (CV140l) 576 USA CV3749 812 RCA CV2661337A W.Electric CV2624 578 USA CV2967 {USA338A W.Electric CV2625 610XP Cossor (CV1154) 813 STC340A W.Electric CV1782 615 CV3506 Cossor (CV26)346A W.Electric eV2626 t..C11 t! It>A- C(/'~I 814 RCA CV629

'~2..t.. if f /0- C ~( S0 7" 815 RCA CV2663349A W.Electric CV2627 625P Cossor (CV1208) 816 RCA CV724349B W.Electric CV2628 631P1 USA (CV220)350A W.Electric CV2629 645 HeinzKauf CV670 822 USA CV2664350B W.Electric eV1799 648P1 USA' CV746 825 RCA CV2665350D W.Electric CV621 653B USA CV666 826 RCA CV630

828 RCA CV631STC

351A W.Electric CV2630 700A W.Electric CV689 829 USA CV2666352A W.Electric CV2631 700B W.Electric CV695354A W.Electric CV2632 70De W.Electric CV696 829A USA CV3599354V Mullard (CVl173) 70DD W.Electric eV699 829B USA (CV2666)357A W.Electric CV691 701A W.Electric CV677 830B USA CV702

832 RCA (CV1088)832A RCA CV788

362A W.Electric CV2633 702A W.Electric CV678367 Mullard CV2634 703A W.Electric CV679 833 RCA CV635367A W.Electric 705A W.Electric CV3587 833A ReA CV635368A W.Electric CV710 706A W.Electric CV3588 836 USA CV636371B USA CV3511 707A

"W.Electric CV3589 837 USA CV637

838 RCA CV638

71

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Type ,Maker or CYNo. Type Maker or CYNo. Type Maker or CYNo.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearest


841 USA CV906 991 RCA CV651 . 1861 Philips (CV1039)843 RCA CV639 994V Mullard 1867 Philips845 RCA CV735 1005 USA CV2874 1876 Philips CV2718 ,845W USA CV3646 10lOA STC 1877 Philips846 RCA CV2668 1043 Mazda (CV1097) 1878 Mullard

849 RCA CV2669 1201 RCA CV2704 1881 Philips849H RCA CV2670 1201A RCA CV2704 1881A Philips851 RCA CV2671 1203 RCA CV2705 1907 USA CV3521852 RCA CV2672 1229 USA (CV711) 1909A Philips (CV2291)857B RCA CV2673 1231 USA CV2707 1924 USA CV2719

859 USA CV2779 1267 USA CV1992 1960 USA CV1792860 RCA CV640 Mullard 2000T USA CV998861 RCA CV641 1268 USA 2050 Westing- CV2565863 RCA CV2674 Mullard house864 RCA CV2675 1282 USA CV902 2051 Westing- CV1798

1294 CV2709 house865 RCA CV2676 1299 RCA CV815 2101 Philips866 RCA (CV32) Cossor866A RCA (CV32) 1378X USA CV761 STC866JR RCA CV2679 1382M868 USA CV2680 1500T Eirnac CV2711 2102 Cossor

1547 USA (CV3789) STC868jPJ23 USA (CV2680) 1560 Philips 2103 Cossor869B USA cV~t7 " STC872 USA CV642 1561 Philips (CV1064) 2151 STC872A USA CV642 1601ABC MOV (CV440) 2501A3 Durnont CV602874 USA CV643 GEC Lab.

1603 RCA CV652 2505A5 Durnont CV740875A Taylor CV644 1608ABCA GEC Lab. ..876 USA CV645 1608BCCA GEC878 USA CV2683 2511A5 Durnont CV741878A USA CV2683 1609 RCA CV2712 Lab.879 USA CV597 1610 RCA CV2713 2529A5 Durnont CV1791-

1611 RCA CV653 Lab.880 USA CV2685 1612 RCA CV654 3025 USA CV2722-884 USA CV647 1613 RCA CV655 3071 USA CV2723·885 USA CV648 3073A STC889 USA CV2686 1614 RCA CV2714889R USA (CV2687) 1616 USA CV656 3209 Cossor CV2725

1619 RCA CV723 3220K Cossor (CV954)889RA USA (CV2687) 1620 RCA CV657 3226D - Cossor CV2727891R USA CV2688 1622 RCA CV658 3226J Cossor CV2786892R USA CV904 3229D Cossor CV2728893R USA CV2689 1625 USA CV659902 USA CV3600 STC 3263DS' COSSOf' CV2731

904V1626 RCA CV1755 3530 Philips (CV405)

Mullard CV2690 Hytron 3874 STC905 RCA CV736 1629 RCA CV1756 3951 USA CV2733906 RCA CV737 STC 3982 USA (CV2680)906P1 RCA CV602 1630 RCA CV2715908BCC GEC 1637 RCA (CV1052)

908CARA4003A STC CV2734

GEC 1642 USA CV875 4004A STC913 RCA CV2691 1655 USA CV2716 4004B STC (CV2329)918 USA CV2692 1693HKM GEC 4006A STC (CV1600)920 RCA 1729 Mullard CV2717 4007A STC927 RCA (CV405) 1754 USA CV3518

929 RCA CV2693 1805 Philips 4008B STC (CV1601)930 RCA CV2694 1805P1 RCA CV832 4009B STC930B USA CV702 1806P1 USA CV817 4011A STC CV1415931 RCA CV2695 1807 Philips 4012A STC CV1445-931A RCA CV2696 - 1809P1 RCA CV1783 4013C STC (CV1605),.935 RCA CV2697 1813P7 USA CV884 4013D STC953 RCA CV738 1814P1 USA CV790 4014A STC (CVI603)954 USA (CV1095) 1815 Philips 4015A STC CV2735955 USA (CV1059) 1821 Philips (CV1443) 4017B STC CV1446-956 RCA CV649 1831 Philips 4018AD STC

957 RCA CV2700 1851 RCA CV599 4018G STC (CV1733)958 RCA CV650 1852 RCA CV660 4019A STC (CV249) -958A RCA CV2701 1852j6AC7 RCA CV660 4019B STC . (CV1655)959 USA CV1794 1853 RCA CVI873 4020A STC (CV1653)972 USA (CV642) 1853j6AB7 RCA CVI873 4020B STC (CVI657)

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Type Maker or cv No. Type Maker or cv No. Type Maker or cv No.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearest


4021A STC (CVI67l) 4120A STC 4687 Mullard CV27664021B STC (CVI663) 4120AA STC (CV536) 4687A MulIard4022AR STC (CVI664) 4121A STC 4690 CV27674022B STC (CVI659) 4121AA STC 4701A CV6774030A STC CV1447 4121AB 4702A CV678

4030C STC CV1447 4140 EMI 4703A CV6794030D ..STC 4201 GEC (CV1097) 4705A CV35874033A STC (CVI220) 4203 . GEC (CV1587) 4706A CV35884033AF STC· CV2743 4205E STC (CV1648) 4707A CV35894033L STC (CVI688) 4211DjE STC 4708A CV3590

4039A STC 4212D STC (CVI619) 4713A CV35934043C STC (CVI448) 4212E STC (CVI619) 4717A . CV35944043D STC 4212E STC (CVI252) 4721A CV35954045A STC (CV243) 4220C STC 4722A CV35964046A STC (CV244) 4222B STC (CVI601) 4726A CV676

4047B STC (CV1600) 4228A STC CV1450 5060 EMI4048C 4242A STC (C\t25) 5215A Ediswan (CVI081)4049C STC (CV1355) 4251AX STC CV2755 5311 EM!4049D STC (CV5) 4257 5517 USA CV36094049GD STC 4257A 5517jCKI013 USA CV3609

4050AB STC 4260A STC CV2756 5544 USA (CV221O)4050AD STC 4264A STC CV2598 5545 USA (CV2215)4050AG STC CV2745 4270A STC (CV30) STC4050BB STC 4274A STC CV1451 5556 USA CV36404050BD STC 4275A STC 5557 USA CV2957

5586 USA CV36114050BG STC 4278A STC4052A STC (CVI081) 4279A STC (CVI250) 5594 USA4053 MOV (CV950) 4282B STC 5607 USA4053A STC 4282BZ STC (CVI365) 5626 USA (CV298)4053A GEC (CV967) 4300A STC CV1452 5628 USA CV2952

5639 USA CV26624056A STC (CVI025) 4304 STC CV27594056B STC 4304B STC CV2760 5641 USA (CV473)4059A STC (CVI61l) 4304BB STC . CV2761 5642 USA (CV2241)4060 MulIard 4304CA STC 5643 USA (CV474) (> 114060A STC (CVI030) 4304CB STC (CV1288) 5644 USA (! v ~'J"7

5647 USA ( 11 "'§1/' I

4061A STC (CV1369) 4307A STC (CV1080)4062A STC (CVI568) 4307AF STC (CVI080) 5651 USA CV25734063ABjYB STC 4310A STC 5654 USA CV40104064A STC CV2746 4313C STC (CV75) 5654j6AK5W USA CV401040MB STC CV1449 4316A STC CV683 5656 USA CV297~

5657 USA c I/~··h

4065A STC 4317 Mullard (CVI20l) ..4066A STC (CV1l81) 4328A STC CV2619 5663 USA CV36104069 4328D STC (CV245) 5664 USA CV17654069A STC (CV1372) 4357 5667 USA (CV2687)4074A STC (CVI8) 4357A STC (CV27) 5670 USA CV4013

5670WA USA CV40134074B STC (CVI573) 43764077A STC (CV33) 4378 Philips CV1453 5672 USA (CV2238)4078A STC CV1420 4390 5675 USA CV29714078GA STC (CV447) 4407 GEC (CVI084) 5676 USA (CV2239)4079A STt 4409 GEC (CV955) 5678 USA (CV2254)

5684 USA CV27534079GA STC4080A STC 44io GEC (CV1087) 5684jC3JjA USA CV27534080GA STC 4502 GEC (CVI086) 5685 USA CV27544081 CV2749 4588 EMI 5685jC6J USA CV27544081A 4602 GEC (CV956) 5686 USA CV3612

5687 USA CV2578

4081A STC CV1797 4605 GEC (CV1085) 5691 USA CV37054094A STC (CVI620) 4606 CV2764 5692 USA cv'~'742..4096AB STC CV2751 4607 MOV (CV960) 5693 USA CV36994100BU Cossor (CVI264) 4608 GEC (CVI511) 5696 USA CV35124101 GEC (CV1588) 4643 .. 5702 USA CV3895

4101D STC (CV2845) 4648 5702WA USA c,/ f")74101E STC (CV1639) 4671 Mullard (CV10S9) 5703WA USA4102D STC (CV1640) 4672 MulIard (CV1095) 5704 USA CV28474102E STC (CV164l) 4673 Mullard CV2765. 5718 USA CC ('>'nc)41Q~D STC (CV1694) 4683 5719 USA CV4008

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Mazda68503USA5971




5725 USA CV4011 5992 USA 6150 USA

5725/6AS6W USA CV4011 5993 USA 6151 USA

5726 USA CV4007 6000 USA 6155 USA (CV2130)

5726/6AL5W USA CV4007 6002 USA CV3902 6155/4-125A Amperex (CV2130)

5727 USA CV4018 6005 USA CV4019 6156 USA (CV2131)

5727/2D21W USA CV4018 6005/6AQ5W USA CV4019 6156/4-250A Amperex (CV2131)

5744WA USA <: fI /b"> 6021 USA C'/'J-ii!..t.rd.. 6157 STC

5749 USA (CV4009) 6024 USA CV3539 6158 STC

STC 6038 USA CV3628 6161 USA CV3901

5749/6BA6W USA (CV4009) 6042 STC 6173 USA

STC5750 USA ~CV4012) 6057 • STC (CV4004) 6180 STC

sl{t(.4-STC

CV~6058 STC (CV4OO7) 6184 USA

IJ~~ 6059 STC (CV4006) 6185 USA

5750/6BE6W USA (CV4012) 6060 STC (CV4024) 6186 USA

STC 6061 STC 6186/ USA

5751 USA CV4017 6AG5WA

5751WA USA CV4017 6062 STC5755 USA CV3755 6063 STC (CV4005) 6187 USA (CV4011)

5755/420A USA CV3755 6064 STC (CV4014) 6188 USA

~/ (/~AC If ')G(.t. 6065 STC (CV4015) 6188/ USA

5763 UA (CV2129) 6066 STC 6SU7WGT

STC 6189 USA ,5768 USA 6067 STC (CV4003) 6189/ USA

5783 USA CcI'J'l'"> 6072 USA 12AU7WA

5784 I USA CV3896{ 6073 ' USA CV2903

57~4WA USA c 11 ~'b) 6074 USA (CV4028) 6201 USA CV3508

>7 ) VIA U5'r+ CI/ ~('~ 6076 Amperex 6202

5787 USA CV3897 6203 0')11 ('I!~

5792 USA 6078 USA 6205

5793 , USA 6079 USA CV3522 6252 Amperex

5794 USA 6080 USA CV2984

5796 USA CV3706 6084 Mullard 6262 EMI

"'",?'-:''7 V'SfJ ~ If >fJClc; Philips ·6286 USA

5799 USA CV2678 6085 Mullard 6299 USA

5800 USA (CV2730) Philips 6305 STC

5814 USA CV4016 t360 U,1r (V51><t..5814A USA CV4016 6086 Mullard -;9c>

5814WA USA CV4032 Philips 6410 USA CV3903

J1:2Jlw'~ CV>"O<j"') 6087 6504A GEC

5829 USA CV3898 6088 USA CV2699 6505A GEe

5839 USA 6089 USA 6685 EMI

5840 USA cv'SG'ut 6090 USA 6853/U650 Ediswan

5842 USA CV3789~846 USA CV2859 6095 USA ~tt7 (CV4019) 6901A GEC

>~'7b \.r> ;q c..rJSt)~ 6096 USA (CV4010) 7101A GEC

5847 USA CV3905 6097 USA (CV4007) 7102A GEC

5852 USA C: I/'~q,,-.., '6098 USA 7184

5861 Mullard (CV273) 6098/ USA 7193 USA CV3601

Philips ~~R6WA USft CIf ...U(1)5866 Amperex ~cl' 7475 Mullard (CV1070)

5876 USA CV2972 8001 CV8246099 USA 8003 'RCA CV2768

5879. USA 6100 USA 8011 RCA (CV62)

5886 USA (CV495) 6100/6C4WA USA 8012 RCA CV662

5889 USA 6101 USA (CV4031)

5894 Mullard (CV424) 6101/6J6WA USA (CV4031) 8013A RCA CV716

Philips 8016 USA CV541

Amperex 8020 RCA CV2967

5894/AX9003 Amperex 6106 USA CV2992 8021 RCA CV35876110 USA (VC;~l 8022 RCA CV934

5894A Philips CV2797 6111 USA cll 'lq, i

Mullard 6112 USA ('(/ :;0:.7 ' 8023 ReA CV933

5896 USA CV2698 6117 USA CV3906 . 8025 RCA CV663

5899 USA (CV475) 8025A RCA (CV~) Ct!

5902 USA CV4029 8026 RCA (CV92)

5903 USA 6130 USA CV3629 9001 RCA CV17576130/3C45 USA CV3629

5907 USA 6131 USA CV3632 9002 RCA CV664

5932 USA CV3899 6132 STC 9003 RCA CV665 . ,

5933 USA CV3517 6135. USA CV4022 9004 RCA CV666

5939 USA CV3545 9005 RCA CV667

5948/1754 USA CV3518 9006 RCA CV27696136 USA CV2990

5948 USA CV3518 6137 USA 9512

5949/1907 USA CV3521 6146 USA CV3523 13077 USA CV2770

5949 USA CV3521 6148 USA 13201A Mullard

5963 USA CV3900 6149 USA 23043 USA CV2772

74

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Type Maker or CYNo. Type Maker or cv No. Type Maker or cv No.Designation Originator (or nearest Designation Originator (or nearest Designation Originator (or nearest


68503 (mod) Mazda CV277368504 Ediswan CV277468506 Ediswan CV277568508 Ediswan68510 Ediswan CV2776

68530jU600 Ediswan CV375668530 Ediswan189048 USA CV2777859483 Westing- CV2779

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CHAPTER II-ADDENDUM

Type Maker or cv No. Type Maker or cv No. Type Maker or cv No.Designation Originator (or nearest Designation Originator (or nearest Designation Originator ( or nearest


AA76 MulIard (CV2369) DP16-22 Mullard (CV2498) GET104 GECACT29 MOV (CV6057) D4G Mullard (CV5319 GETI06 GEC (CV7008)AD80 Ferranti CV5229 D4P 20th CE CV5320 GET110 GEC (CV7009)AFX212 EEV (CV1949) D5AK/611 (CV6019) GET111 GECAH217 EEV (CV642) EA52 Mullard CVS140 GETll3 GECALl 3-36 Mullard CV5282 EC71 Mullard (CV3930) GET114 GECAL22-1O Mullard CV5300 ECC70 Mullard (CV3986) GET115 GECANT Mullard (CVtl28) ECC84 Mullard CVS281 GET116 GEC (CV7002)AW223 EEV (CV160l) ECC189 Mullard CV5331 GET571 GEC (CV7080)AX224 EEV (CV1835) ECF 80 MulIard I CV5215 GET572 GEC (CV708l)AX228 EEV (CV2399) EF37A MulIard I (CVS080) GET573 GEC (CV7082)AX230 EEV (CV2518) EF74 Mullard (CV476) GET872 GEC (CV7042)A232 EEV CV3587 EF89 Mullard CV5156 GET873 GEC (CV7004)A17l4 GEC EF711 Mullard (CV477) GET874 GEC (CV7003)A2094 USA CVS056 EF732 I GET875 GEC (CV7087)A2196 GEC CV3920 EF734 (CV3929) GEX36(quad) GEC (CV2279)A2244 GEC CV3921 EF800 CV5092 GEX37 GEC (CV442)A2272 MOV (CV2318) ElT Mullard CV5106 GEX45jl GEC (CV425)A2293 MOV (CV4079) EL34 Mullard CV1741 GEX45/1B GEC CV5145A2426 MOV (CV4082) EFP60 Philip CVS108 GEX54 GEC (CV448)A2521 MOV (CV2453) EL71 Mullard (CV4029) GEX54/3 GEC CV166A2599 MOV CV5242 FL803 CV5093 GEX64 GEC (CV2310)A2688 MOV (CV408l) EL821 Mullard (CV2127) GEX66 GEC (CV2290)A2744 MOV (CV4105) EL822 Mullard (CV2382) GEX541 GEC CV5104A2913 MOV (CV4107) EM81 MulIard CV5055 (CV7122)

CV5413 EN92 Mullard (CV3S12) GEX941 GEC (CV7047)BL25 USA CV5066 EN93 Mullard (CV1949) GEX942 GEC (CV7048)BR189 EEV CV5218 ES75H GPO (CV5060) GHT2 MOV (CV2418)BR19lB EEV CV5289 ET51 Mullard CV5277 GHT4 MOV (CV6026)BS112 BTH (CV1743) EW51 GEC GJ3M AEI (CV7038)RT95 BTH CV5141 EWS3 GEC GJ4M AEI (CV7036)BU28/4 Ediswan CV5003 FW54 GEC GJ5M AET (CV7039)BW187 EEV (CV421) EW58 GEC GJ6M AEI (CV7037)Bll09 EEV CV789; EW59 GEC GK2261 CV5095

CV2736 EZ81 Mullard CV5072 GK2401 CV5096CCT6 MOV (CV60l6) E88CC German CV5231 GL6621 USA CV5069CClL Hivac CV5299 E88CC MulIard (CV2492) GN10 CV5240CGTE AET (CV425) E88CC/Ol Mullard (CV2493) GR10A CV5291CG3E USA eV164 E90CC MulIard CV5214 GS12/C Ericsson CV1740CG4E AET (CV448) E180F GPO (CV3998) GT41 AET (CV7042)CG5E AEI (CV442) E686 CV5094 GTE175M Ericsson CV5348CG64H AET CV478 E2196 GEC CV3920 GTK95M/S Ericsson (CV256)CK705 USA CV2650 E2244 GEC CV3921 GTR120A Ericsson (CV45)CME141 Mazda CV5267 E2811 GEC CVS210 GXU2 GEC (CV2518)CRllOO EEV CV52l9 E28l5 MOV CV5315 GXU3 GEC (CV2399)eS31A BTH CV5022 E2908 MOV (CV5326) GX403 EEV CV5297C36A USA CV165 FX219 EEV CV3540 GX406 EEV CV5230CS37A USA CV367 FX225 EEV (CV1787) GX415 EEV CV5204CV2290 GEC (CV7l10) FX227 EEV (CV372) G233 MulIard (CV378)CX1113 EEV (CV2851) FX229 EEV (CV352l) G234 Mullard (CV1377)CXl119 EEV CV5268 FX231 EEV CV2993 G237 MulIard (CV378)ex11 20 EEV (CV605l) FX290 EEV (CV6022) G5S3 USA CV3981CXTl eV2389 F3Al Leigh Elect (CV4509) G7A USA CV5l27CXT2 CV2400 F3A2 Leigh Elect (CV4510) G7B USA CV5047C3M Germany CV5232 GAl STC CV5237 G1O/200E STC CV535lC68MM/1D STC CV5l29 GA2 STC CV5238) G55/1K STC CV5298Cl 108 EEV (CV2130) GCTOD Ericsson (CV5143) G400 EEV (CV289)Cll11 EEV (CV427) HD2016A USA CV5051Cl112 EEV (CV2131) GC12/4B Ericsson CV5243 HD6002 USA CV3992Cl133/ GD60 Ericsson (CV2374) HD6616 USA CV5J96

4PR60A EEV (CV2416) GD90 Ferranti CV5229 HR8 Ferranti CV5159DA42 GEC (CV2394) GDI00 Ericsson (CV2375) JP9-15D MulIard CV5123DF61 Mullard (CV2371) GDlOOA Ericsson (CV188) JP9-80 Mullard CV3569DF62 MulIard (CV2237) GD100B Ericsson (CV1070) JP9-180 MulIard (CV2373)DF63 Mullard (CV2433) GD120A Ericsson (CV5110) JP9-250 Mullard (CV2284)DG4-1 Mullard CV5131 GD150A Ericsson (CV216) JP9-2S0A Mullard CV3953DG7-6 MlllIard CV5269 GD150C3 Ericsson (CV2l6) JPG9-02C Mullard CV5443DG7-32 MlllIard (CV2431) GD150M Ericsson (CV1832) JPT9-Gl MulIard (CV2420)DG7-36 Mullard (CV3946) GEIO Ferranti CV5109 JPT9-G2 Mullard (CV242l)DG16-22 Mullard (CV2352) GET3 GEC KD63 Ferranti CV5107DH3-91 Mullard CV2302 GET4 GEC KS38-A F~rranti CVS283DK92 MulIard CV5172 GET5 GEC KT55 MOVDL96 Mullard (CV2361) GET6 GEC KT88 MOV CV5220DL91 Mullard (CV783) GET103 GEC (CV7001) K311 EEVDL98 Mullard (CV2240) (CV7005)

IDL620 Mullard (CV2238) (CV7006)DP7-5 Mullard CV5171 (CV7074)DP13-2 Mullard CV5157

76a July, 1961

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K312 EEV (CV2273) Nl032 EEV CV5402 RG4-1250 Mullard (CV5)K3l3 EEV Nl033 EEV CV5403 RG4-3000 MullardK3l5 EEV Nl034 EEV (CV2381) RR3-l250 MullardK3l7 EEV OA2WA USA (CV4020) RR3-l250A Mullard (CV2399)K328 EEV Mullard RR3-1250B MullardK329 EEV (CV2496) EEV RL7076-2A Ediswan CV5206K335 EEV (CV2343) OA5 Mullard (CV7047) RL7076-2B Ediswan CV2965K337 EEV CV5130 (CV7048) RS20A ST&C (CV702l)K35l EEV (CV2494) OA10 Mullard (CV7049) RS21A ST&C (CV702l)L3040 USA CV5089 OA47 Mullard (CV7076) RS22A ST&C CV5124L304l USA CV5090 OA7l Mullard (CV448) RS23A ST&C (CV7022)MAG8 GEC (CV2380) OA73 Mullard (CV442) RS24A ST&C (CV7023)MB13-l Mullard CV5244 OA74 Mullard (CV425) RS25A ST&C (CV7023)MF22-75 Mullard (CV2372) OA8l Mullard CV1353 RS26A ST&C (CV7024)MF31-95 Mullard CVl869 (CV425) RS27A ST&C (CV7024)

(CV2328) (CV448) RS28A ST&C (CV7025)MG13-11 MuUard (CV2497) OA85 Mullard CVl354 RS32A ST&C CV5286MM13-10 Mullard CV5164 OA95 Mullard (CV704l) RS35A ST&C CV5336MP3l-55 Mullard (CV2413) OA202 Mullard (CV7040) RS52A ST&C CV5250MX14 EMI CV5163 OA21O Mullard (CV7113) RS52AF/l ST&C CV5346MX4084 Thorn CV5024 OA2l1 Mullard (CV7ll4) RS55A ST&C CV5275MY3-275 Mullard (CV1252) OAZ203 Mullard CV5308 R508l EMIM5RM-32l (CV2489) OB2WA USA (CV4028) R5146 EMIM6SJ-303 (CV2490) EEV R5l49 EMIM518A EEV CV2744 Mullard R5161 EMIM521 EEV (CV2376) OC16 CV7010(0) R5222 EMIM523 EEV (CV24l2) OC23 Mullard (CV7054) R5289 EMIM525 EEV (CV2362- OC28 Mullard (CV7085) SA495 Semicon-

CV2368) OC29 Mullard (CV7083) ductors CV5335M528 EEV (CV160) OC35 Mullard (CV7084) SC1/350 GEC (CV2456)M537 EEV (CV228l) OC36 Mullard (CV7086) SCl/400 GEC (CV2457)M538A EEV (CV2473) OC41 Mullard (CV7042) SCl/600 GEC (CV2458)M542 EEV CV3602 OC44 Mullard (CV7003) SCt/800 GEC (CV2459)M548 EEV (CV503l) OC45 Mullard (CV7004) SC1/1000 GEC (CV2460)M8080 Mullard (CV4058) CV5105 SCl/1200 GEC (CV2461)M8091 Mullard (CV4044) OC70 Mullard SCl/l400 GEC (CV2462)M8096 Mullard (CV4039) OC71 Mullard (CV7005) SCI/1600 GEC (CV6065)M8097 Mullard (CV4059) OC72 Mullard (CV7006) SCI/1800 GEC (CV6066)M8098 MuIlard (CV4048) OC72 SCI/2000 GEC (CV6067)M8099 Mullard (CV4070) (matched S0432 Mullard CV3544M8136 Mullard (CV4003) pair) Mullard SJ052B AEI CV5252M8137 Mullard (CV4(y)4) OC73 Mullard CV5337 SJ102A AEI (CV703l)M8l40 MulIard (CV4002) OC77 Mullard (CV7007) SJt02B AEI (CV7026)M814l Mullard (CV4036) OC139 Mullard (CV711l) SJ202A AEI (CV7032)M8l42 MuIlard (CV4054) OC140 Mullard (CV7112) SJ202B AEI (CV7027)M8144 Mullard (CV4033) OC170 Mullard (CV7089) SJ30IA AEI CV5208JM8149 Mullard (CV4034) OC200 Mullard (CV7043) SJ301B AEI CV5342M8157 Mullard (CV483) OC20l Mullard (CV7044) SJ401B AEI CV5253M816l MuIlard (CV40l5) OC20l (low SJ401F CV5253M8162 Mullard (CV4024) noise) Mullard (CV7075) SJ402A AEI (CV7033)M8163 Mullard CV4104 OC203 MuIlard (CV71l7) SJ402B AEI (CV7028)M8167 Mullard (CV4067) OC450 Brush SJDX13/B4 AEI CV5208M8l78 Mullard Crystal CV5334 SIM2 GEC (CV2154)M8179 MuUard (CV4076) OC470 Brush SIM5 GEC (CV2155)M8l80 Mullard (CV4050) Crystal CV5352 S1M8 GEC (CV2391)M8184 Mullard OCP7l Mullard SIM9 GEC (CV2392)M8190 Mullard (CV4066) OD3W Mullard CV3979 SU42 CV5159)M8195 Mullard (CV4085) PCC84 Mullard CV5l92 SV15 USA CV5199M8l96 Mullard (CV4011) PCL83 Mullard CV5l44 SVCl GEC (CV7088)M8204 Mullard (CV40l8) PL8l Mullard CV5077 SVCII-l5 GEC CV5318M8206 Mullard PEN Tl39 Mullard (CV399) SX47(5%) GEC (CV7067)M8207 Mullard PO NO.3 (CV7001) SX5l(5%) GEC (CV7068)M8208 Mullard PO NoA (CV7002) SC56(5 %) GEC (CV7069)M82l2 Mullard (CV4007) PSV13 Ediswan (CV6025) SX62(5%) GEC (CV7070)M8214 Mullard (CV4035) P40 STC SX68(5%) GEC (CV7071)M8223 Mullard (CV4020) QK387 USA CV5019 SX7S(5%) GEC (CV7072)M8224 Mullard (CV4028) QK388 USA CVS020 SX82(S %) GEC (CV7073)M822S Mullard (CV4080) QK428 USA CV3966 SX63l GEC (CV7021)M8232 Mullard CVS029 QQV02-6 Mullard (CV2466) (CV7026)M8234 Mullard CV5082 QQV04-15 Mullard (CV788) SX632 GEC (CV7022)M8237 Mullard (CV4049) QQVOS-PlO Mullard CV2295 (CV7027)M8245 Mullard (CV4019) QSl209 EEV (CV449) SX634 GEC (CV7023)Nl00l EEV CV5406 QV2Q-P18 Mullard (CV27S2) (CV7028)Nl002 EEV CV5407 QV2Q-PI8B Mullard (CV24l6) SX636 GEC (CV7024)NlOlO EEV (CV2393) QYS-SQ-P40 Mullard (CV313) SX638 GEC (CV7025)NI013 EEV CV5408 QY3-6S Mullard (CVI90S) SX64l GEC (CV4073)NI031 EEV CV5401 RGI-240A Mullard (CVI072)

76b July,. 1961

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SX642 GEC (CV4074) VR575BB AEI CV5254 VX8209 MulIard (CV2369)SX643 GEC (CV4077) VS lOG CV5290 VX8222 Mullard (CV2421)SX644 GEC (CV4078) VXI7I Mullard (CV2361) VX8234 Mullard (CV4098)SX645 GEC CV5347 VXI002 Ferranti (CV2480 VX8241 Mullard (CV6072)SX76I See VXI009 Ferranti (CV2484) VX8248 Mullard (CV5311)

SVCl VXI036 Ferranti (CV2479) VX9002 EEV (CV2386)SX780 GEC (CV7051) VXI042 Fcrranti (CV6006) VX9OO5 SERL (CV2350)SX781 GEC (CV7050) VXl520 Ferranti (CV4078) VX9058 Nore (CV2482)

(CV7052) VXl521 Ferranti (CV7050-3) VX9087 EEV (CV2376)SX782 GEC (CV7053) VX2511 EEV (CV6051) VX9132 EEV (CV4052)S6A203 20th CE VX2525 EEV (CV2473) VX9133 EEV (CV4053)TBL6-60oo Mullard CV3926 VX2527 EEV (CV6022) VX9138 EECo. (CV2455)TB3/750 Philip CV1350 VX2537 EEV (CV6003) VX9156 Ferranti CV5312TB4/1250 Philip CV1351 VX3134 GEC (CV2481) VX9167 EEV (CV2496)TD3-12 Mullard VX3136 MOV (CV239l) VX9I75 Ferranti (CV2396)TD03-10F Mullard CV2204 VX3159 MOV (CV4061) VX9179 Nore (CV2482)TD04-20 Mullard (CV397) VX3171 MaV (CV2392) VX9194 Ericsson (CV6044)TD05-12 Mullard VX3176 MaV (CV2378) VX9196 NoreTD1-loo Mullard (CV2516) VX3177 MaV (CV2379) Electric (CV6028)TH1657A NATO CV5011 VX3197 MOV (CV2380) VX9200 Cintel (CV2467)TJ1 STC VX3220 GEC- VX9201 Cinte1 (CV2468)TJ2 STC MOV (CV2429) VX9202 Rank-TB STC VX3221 GEC Cinte1 (CV6050)TK20A ST&C (CV7042) MaV (CV2430) VX9208 Nore (CV2483)TK23C ST&C (CV7107) VX3222 MOV (CV2418) VX9216 ElliottTRNl GEC (CV2285) VX3250 GEC (CV6026) Bros. (CV6005)TRP3 GEC (CV2430) VX3256 GEC (CV4078) WF46 Ferranti CV5227TRP4 GEC (CV2378) VX326I GEC (CV2488) WF47 Fen'anti CV5228TRP5 GEC (CV2379) VX3263 MOV (CV2397) W7/3G STC CV5293TRP6 GEC (CV2429) VX3269 GEC (CV7080-2) XB2 Hivac CV1634TRP8 GEC (CV2488) VX3276 MaV (CV6034/ XB104 AEI (CV7118)TSlO STC CV5322 35/36) XC11 Hivac (CV2257)TTR31MR VX3286 GEC (CV7050-3) XC12 Hivac (CV6004)

(9005-9155) Fen'anti CV5162 VX3303 GEC (CV71 08) XC15 Hivac CV5088TU1250 USA CV5194 VX3304 GEC (CV7109) XC17 Hivac CV5078TYl STC VX3509 MOV (CV4075) XC18 Hivac (CV2486)TY2 STC VX3518 MOV (CV2398) XC23 Hivac CV5217TY3-250 Mullard CV1350 VX3521 MaV (CV4071) XC305/1 Hivac (CV2414)TY4-350 Mu lard CV635 VX3522 MOV (CV4072) XD60 USA CV168TY4-500B MulIard CV167 VX3524 MaV (CV4106) XD61 USA CV169TY7-6000A Mullard CV5239 VX3527 MOV (CV4105) XFRI Hivac (CV2237)T19G USA CV5160 VX4176 BTH (CV6070) XFR2 Hivac (CV2254)U2 Mav CV142 VX5023 EMI (CV6001) XFR3 Hivac (CV2239)U7 VX5048 EMI (CV6071) XFY14 Hivac (CV2238)

(Selected) MOV CV149 VX5052 EMI CV5114 XG2-500 Mullard (CV1144)U25 Mazda CV5256 VX5057 EMI (CV2353) XG2-6400 MullardU26 Mazda CV5257 VX5065 EMI (CV2495) XG15-1O MulIardU191 Mazda CV5258 VX5069 EMI (CV6002) XH25-500 MulIardU329 Mav CV5259 VX6094 Ediswan (CV6045) XRI-1600 USA CV3706UR30 Ferranti CV5225 VX6107 Ediswan (CV4064) XRl-1600A Mullard CV5234UR40 Ferranti CV5226 VX6114 Ediswan (CV4060) XSlOl AEI CV5353VI0/50A Newmarket CV5330 VX6117 Ediswan (CV2360) X79 GEC CV5115V15/20P Newmarket CV5309 VX6II8 Ediswan (CV6025) ZL6 BrushV30/20IP Newmarket CV5327 VX61I9 Ediswan (CV4041) Crystal CV5280V30/30DP Newmarket (CV7II5) VX6I20 Ediswan (CV4042) ZRll Ferranti (CV7018)V30/30P Newmarket (CV7011) VX7039 STC (CV2358) (CV7026)V60/30DP Newmarket (CV7116) VX7098 STC (CV405l) ZRl2 Ferranti (CV7019)V60/30P Newmarket (CV7012) VX7099 STC (CV4052) (CV7027)V238A/IK STC CV5292 VX7104 STC (CV2422) ZR14 Ferranti (CV7020)V239CjlK STC CV5048 VX7I 10 STC (CV2465) (CV7028)V241C/IK STC CV5049 VX7I26 STC (CV4504) ZR20 Ferranti (CV7014)VA201B USA (CV2494) VX7147 STC (CV2499) ZR21 Ferranti (CV7015)

Ferranti VX7I54 STC (CV53 14) ZR22 Ferranti (CV7016)VA203B USA CV5249 VX7507 STC (CV4506) ZR24 Ferranti (CV7017)VCRX225 EMI (CV2415) VX7512 STC (CV4069) ZR31 Ferranti (CV7077)VCRX346 Mullard CV2372 VX8084 Mullard (CV2387) ZR32 Ferranti (CV7078)VCRX387 GEC (CV2435) VX8121 Mullard (CV4501) ZR34 Ferranti (CV7079)VCRX389 GEC (CV2436- VX8I22 Mullard (CV4502) ZS10 Ferranti (CV4073)

43) VX8123 MulIard (CV4504) ZSlOA Ferranti CV5174VCRX397A EMI (CV2388) VX8155 Mullard (CV4505) (CV4073)VCRX407 (CV2469) VX8163 MulIard (CV4104) ZSlOB Ferranti CV5202VCRX412 GEC (CV2464) VX8166 Mullard (CV2382) (CV4073)VCRX426 20th CE (CV2485) VX8170 Mullard (CV2371) ZS10C Ferranti (CV2384)VCRX432 MOV (CV2463) VX8182 Muliard (CV2420) ZS20 Ferranti (CV4074)VCRX433 Mullard (CV2463) VX8190 Mullard (CV4066) ZS20A Ferranti CV5175VCRX437C (CV2497) VX8194 Mullard (CV2411) (CV4074)VR7B AEI CV5255 VX8205 Mullard (CV6015) ZS20B Ferranti CV5103

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Type Maker or CYNo. Type Maker or CYNo. Type Maker or CYNo.Designation Originator (or nearest Designation Originator ( or nearest Designation Originator (or nearest


ZS21 Ferranti (CV4077) IP39 CV5241 4G8 Plessey (CV7028)CV5098 IS001 Texas (UK) (CV7027) 4J26 USA CV3779

ZS22 Ferranti (CV4078) 1S003 Texas (UK) (CV7028) 4127 USA CV3780CV5099 1SOO5 Texas (UK) (CV7029) 4128 USA CV3781

ZS30A Fen"anti IS007 Texas (UK) (CV7030) 4129 USA CV3782ZS30B Ferranti ISI11 Texas (UK) (CV7045) 4130 CV3783ZS31 Ferranti (CV7119) 1S112 Texas (UK) 4132 EEVZS31A Ferranti 1S113 Texas (UK) (CV7013) 4J43 EEVZS31B Ferranti IS115 Texas (UK) (CV7046) 4J52A USA CV5018ZS32 Ferranti (CV7120) (CV7047) 4J54 USA CV3947ZS32A Ferranti IS121 Texas (UK) (CV7040) 4J55 USA CV3948ZS32B Ferranti 1S401 Texas (UK) CV5344 4J56 USA CV3949ZS34 Ferranti (CV7121) (CV7032) 4J57 USA CV3950ZS51 Ferranti Cv5279 IS401R Texas (UK) CV5345 4J58 USA CV3951Z2A33(5%) ST&C (Cv7090) 15403 Texas (UK) CV7033 4J59 USA CV3952Z2A39(5%) ST&C (CV709l) 1S405 Texas (UK) CV5205 4178 EEVZ2A47(5%) ST&C (CV7092) (CV7034) 4X150D USA (CV399l)Z2A47(l0%) ST&C CV5222 IS407 Texas (UK) 4X250B USA (CV2487)Z2A51(5%) ST & C CV5251 1S5022 Texas (UK) 5ADP1 USA (CV5035)Z2A56(5%) ST & C (CV7093) 1S5027 Texas (UK) 5ADP7 USA CV5125Z2A62(5%) ST & C CV5338 1S5033 Texas (UK) 5BKP1 ET I Cv5168Z2A68(5%) ST & C (CV7094) 1S5039 Texas (UK) 5CP7A USA

ICv3954

Z2A75(5%) ST & C CV5339 1S5047 Texas (UK) 5CP12 USA CV3955Z2A82(5%) ST & C (CV7095) IS5056 Texas (UK) 5JP2A USA CV3918Z2A91(5 %) ST & C CV5340 1S5068 Texas (UK) 5FP11 USA Cv5070Z2A91(l0%) ST&C CV5288 1S5082 Texas (UK) 5FP14 USA CV1789Z2A1oo(5%) ST&C (Cv7096) ~lS7047 Texas (UK) (CV7099) 5FP14A USA CV5248Z2A1 10(5 %) ST&C CV5341 1S7051 Texas (UK) (Cv71OO) 5FPl5 USA CV5139Z2A120(5%) ST&C (CV7097) IS7056 Texas (UK) (CV71Ol) 5JP7A USA CV5154Z2A130(5%) ST&C CV5316 1S7062 Texas (UK) (CV7102) CinTelZ2A150(5%) ST&C (Cv7098) IS7068 Texas (UK) (CV7103) 5R4WGB USA CV5181Z8 Brush CV5350 IS7075 Texas (UK) (CV7104) 5UP1 USA Cv5223Z319 GEC (CV2276) 1S7082 Texas (UK) (CV7105) 5Z094 USA CV162Z502S MuJlard (CV2325) .lS7150 Texas (UK) (CV7106).. 6AC7W USA CV3924Z510M Philips CV5278 1v2 USA CV3994 6AC7Y USA CV3973Z700T Mullard CV5122 1X2A USA CV5032 6AF4 USA CV5036Z759 GEC (CV5060) 2C36 USA CV3965 6AF4A USA CV5074Z759S MOV CV5325 2C39 USA CV3940 6AG7 USA CV1882Z803U Mullard (Cv2434) 2E26 USA (Cv3990) 6AG7Y USA CV39781B59jRI130B USA Cv5207 2G8 Plessey (CV7027) 6AJ4 USA CV51261G8 Plessey (CV7026) 2130 USA CV3944 6AJ6 USA Cv995IN21D USA CV5148 2J51A USA CV5134 6AM4 USA CV5073IN23C USA CV5012 2K45 USA Cv3945 6AN4 USA Cv3989IN23CR USA CV5013 2N456 USA CV5321 6ANS5WA USA Cv51821N23E USA 2-01C USA CV5176 6AU7 Cv50521N32 USA CV5016 2SM15 USA CV5193 6BA6W USA CV5037IN34A USA CV3934 2S002 Texas (UK) (CV7056) 6BC4 USA CV5038IN38A USA CV5064 2S0D3 Texas (UK) (CV7057) 6BL7 USA CV5039IN53 USA CV5015 2S004 Texas (UK) (CV7058) 6BM6 USA CV3615IN63 USA CV3967 2S005 Texas (UK) (CV7059) 6BM6A USA CV3939IN66 USA CV2650 2S012A Texas (UK) (CV7061) 6BQ6G USA Cv5040IN67A USA CV3993 2S013A Texas (UK) (CV7066) 6C4WA USA CV51831N70 USA Cv5063 2S014 Texas (UK) (Cv7060) UK CV4058IN78 USA CV5014 2S017 Texas (UK) (CV7062) 6CB6 USA CV39951N82 USA CV1632 2S018 Texas (UK) (CV7063) 6CD6GA USA CV5184IN82A USA CV5213 2S019 Texas (UK) (CV7064) 6CL6 USA CV5041IN127 USA CV5177 2S020 Texas (UK) (CV7065) 6EP GECIN191 USA CV5149 3Ajl67M STC (CV5112) 6EPll GEC CV5349IN198 USA 3ACP2 USA CV1537 6G8 Pless~y (CV7029)

Hughes Int. CV5076 3AFPl USA CV5302 6J4WA USA CV5029IN210 USA CY5178 3B/241M ST&C CV5116 6J6WA USA (CV403l)1N220 USA CV5179 3C45 USA (CV6007) 6L6GTY USA CV53061N254 USA CV5180 Mullard STCIN277 USA CV5294 3D22A STC (CV285l) 6L6Y USA CV51181N311 GEC (CV2154) 3DPIA USA CV3968 6SA7Y USA CV39741N311R GEC (Cv2155) 3J/195E STC CV5071 6SH7L USA CV5067IN320 USA CV5026 3JP2 USA CV5004 6U4GT ST&C Cv52871N358 USA CV5303 3JPll USA CV5034 6U8 USA CV5065IN457 USA CV5295 3RPI USA CV3941 6V3A USA CV50211N458 USA CV5296 3Vj390A STC CV5027 6X4WA USA CV5185IN459

I

USA CV5198 3v j390B STC CV5028 UK CV4005Hughes Int. 3WPl USA CV3941 6/30L2 Mazda CV5264

1N462 USA CV5236 3-14 USA CV5033 7YP2 USA CV50611N540 USA CV5197 4B36 USA CV2779 8G7 PI~ss~y (CV7030)

I

Texas Inst. (CV7028) 4C35A USA

I

CV5247 8MG6 Mullard CV5274IN547 USA CV5305 4EP7 ET CV5087 10C2 Mazda CV52601P21 USA CV5138 4G8 Sp. Plessey CV5301 12AEP26 (CV429)

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Type Maker or CV No. Type Maker or

ICV No. Type Maker or I CV No.

Designation Originator (or nearest Designation Originator (or nearest Designation Originator ( or nearestin brackets) in brackets) in brackets)

!I

12AH8 STC CV5317 5841 USA CV506212AT7WA UK (CV4024) 5844 USA CV50t6

USA (CV5212) 5881 USA CV279612BH7 ST&C CV5042 5906 USA CV393112E1 Ediswan 5933W/A USA CV524612GH GEC (CV2287) 5947 USA CV515112SC8Gt USA CV3938 5977 USA CV393212SF7GT USA CV170 6005/12SP7D USA CV3655 6AQ5W/6095 USA CV519012SR7GT USA CV3980 6027B USA CV513512SW7GT USA CV3983 6080WA USA CV500813El Ediswan (CV2377) 6097B EMI (CV2316)20CV Mullard .cV5120 6097C EMI (CV2317)20Ll Mazda CV5261 6098CT USA CV505320P3 Mazda CV5262 6110 USA CV500520P4 Mazda CV5263 6112 USA CV500726Z5W USA CV5030 6203 USA CV500927M2 Ediswan CV5085 6205 USA (CV2432)'27M13 Mazda CV5310 Mullard30BIP3 Ediswan CV5084 6236 USA CV397530P4 Mazda CV5265 6260B EMI CV511430P12 Mazda CV5266 6336 USA CV518733B/152M ST&C (CV1540) 6390 USA CV505461SPT Cossor CV5081 6442 USA CV398867A USA CV5127 6443 (CV4044)75B1 Mullard (CV284) 6463 USA CV530475C1 Mullard (CV4080) 6481/5767 USA CV522485A3 Mullard (CV4066) 6533 USA CV513689L ET CV3971 6538 Mullard (CV2236)90C1 Mullard CV5173 6539 Mullard (CV2255)95A1 Mullard (CV286) 6574 Mullard150B3 Mul1ard (CV287) 6870 STC CV5121150C3 Mullard (CV216) 6975150C4 MuIlard (CV4020) (VA203B) USA CV5249212-G11A USA CV5050 25110 EMI (CV2428)354 USA CV3964450TL USA CV5017559 USA CV3963576A USA CV5150577 USA CV3969578 USA CV5165601C USA CV5001622C USA CV5075719A USA CV3956811A USA CV5043902A GEC (CV2301)1252W GEC (CV2464)1258 USA CV39571601G GEC (CV6027)1601M GEC (CV2435)1608ABA GEC (CV1536)2269Y GEC (CV2463)2803U Mullard5636 USA (CV3928)

Mul1ard5641 USA CV5211 I

5643 USA CV50795651WA USA CV51865654/6AK5/

6096 USA CV52165670WA USA CV5166 I

i

5687WA USA CV51885702WA USA CV50575703 USA CV39175721 USA CV3970

5726/6AL5W/ USA CV51896097

5762 EEV (CV2383)5783WA USA CV39605784WA USA CV50585787WA USA CV51135814 USA CV5146

5829WA USA CV50595836 USA CV50445837 USA CV5045 I

I

I

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CHAPTER IIIOLD STORES REFERENCE NUMBERS/CV TITLES

OLD TITLE OLD TITLE OLD TITLE OLD TITLE OLD TITLEA.P. (or Nearest A.P. (or Nearest A.P. (or Nearest A.P. (or Nearest A.P. (or NearestNo. in Brackets) No. in Brackets) No. in Brackets) No. in Brackets) No. in Brackets)

W 122 CV 1180 W1535 CV 1186 W7372 CV 572 3910 CV 1229 7431 CV 1225W 263 CV 1181 W1636 CV 1195 W7373 CV 1944 4407 CV 1166 7434 CV 1295W 264 CV 1182 . W1624 CV 1268 W7450 (CV 1106) 4408 CV 1164 7435 CV 1205W 265 CV 1183 W1628 CV 1196 W7451 CV 1424 4427 CV 1165 7436 CV 1206W 266 CV 1184. W1691A CV 1245 W7452 (CV 1300) 4476 CV 1265 7437 CV 1207

W 267 CV 1244 W1699 CV 1242 W7453 CV 1419 4476A CV 1266 7438 CV 1217W 268 CV 1039 W1851 CV 959 W7454 CV 1425 4556 CV 1248 7439 CV 1208W 269 CV 1128 W1889 CV 968 W7455 CV 4803 4562 CV 1293 7440 CV 1269W 281 CV 1281 Wl920 CV 957 W7983 CV 1331 4562A CV 1221 7446 CV 1271W 282 CV 1282 W1921 CV 958 W7984 CV 1306 4589 CV 1276 7447 CV 1273

W 283 CV 1187 W1927 CV 1197 W7985 CV 1366 4656 CV 1220 7448 CV 1274W 284 CV 1113 W2077 CV 509 W8174 CV 977 4687· CV 1223 7448C CV 1275W 285 CV 1201 W2078 CV 1861 W8182* CV 1409 4738A CV 1236 7449 CV 1272W 306 CV 950 W2160 CV 609 W8246 CV 1347 4803 CV 1141 7469 CV 981W 307 CV 951 W2161 . CV 612 W8249 CV 1370 4869 CV 1203 7505 CV 1473

W 308 CV 952 W2162 CV 613 W8335 CV 1420 4889 CV 1288 7508 CV 242W 337 CV 1232 W2163 CV 1834 W8337 CV 1372 5199A CV 1204 7608 CV 248W 560 CV 1234 W2164 CV 1837 W8380 CV 1322 5232 CV 1292 7662 CV 1774W 580 CV 1235 W2165 CV 1891 W3881 (CV 171) 5233 CV 1258 8431 CV 980W 612 CV 1142 W2166 CV 585 W8382 (CV 124) 5381 CV 1175 8751 CV 1038

W 613 CV 1279 W2167 CV 1900 W8836 CV 1422 5382 CV 1109 8752 CV 1160W 614 CV 1143 W2168 CV 690 W8850 CV 176 5433 CV 1259 8753 CV 1019W 628 CV 1250 W2193 CV 617 W8920 CV 976 5458 CV 1069 9589 (CV 1648)W 790 CV 1176 W2510 CV 1255 W9074 CV 975 5459 CV 1199 9590 (CV 25)W1039 CV 1161 W2511 CV 1254 W9284 (CV 1473) 5476 CV 1278 9591 CV 1415

W1065 CV 1124 W2512 CV 1148 W9285 (CV 242) 5529 CV 1178 13730 CV 1456W1066 CV 1129 W2514 CV 1256 W9286 (CV 1432) 5631 CV 1179 13731 CV 1457WI067 CV 1188 W2515 CV 969 W9287 (CV 1472) 6237B CV 1211 21054 CV 1331WI068 CV 1290 W2529 CV 1198 412 CV 1171 6380 CV 1267 53064 CV 248WI068A CV 1291 W2536 CV 1257 789A CV 1239 6675D CV 1233 53065 CV 1474

W1069 CV 1252 W2697 CV 1202 803 CV 1264 6712 CV 982 53162 CV 964W1070 CV 953 W2973 CV 1149 813 CV 1222 7021 CV 1200 53270 CV 965W1071 CV 954 W3128 CV 960 850 CV 1055 7029 CV 1472 5327<1 CV 966WlO72 CV 978 W3244 CV 970 1166 CV 1172 7050 CV 1294 54218 CV 967W1231 CV 1243 W3337 CV 963 1188 CV 2951 7120 CV 1213 _ 55059 CV 986

W1240 CV 1251 W3394 CV 1296 1260 CV 1056 7201C CV 1270W1241 CV 1249 W3446 CV 1287 1347 CV 1226 7403 CV 1064W1244 CV 1144 W3792 CV 1863 1348B CV 1216 7404 CV 1151W1280 CV 1285 W4000 CV 575 1349 CV 1228 . 7404A CV 1152W1290 CV 1147 W4251 CV 988 1457 CV 1174 7405 CV 1153

W1295 CV 1286 W4825 CV 971 1512A CV 1240 7405A CV 1154W1301 CV 1189 W5534 CV 972 1607 CV 1173 7406 CV 1150W1302 CV 1190 W5600 CV 973 1959 CV 1218 7407 CV 1155W1303 CV 1191 W6023 CV 1400 3077 CV 1542 7408 CV 1156W1304 CV 1134 W6024 CV 1402 3191 CV 1241 7409 CV 1157

W1305 CV 1253 W6025 CV 1401 3567t CV 979 7410 CV 1158W1306 CV 1145 W6026 (CV 1056) 3704 CV 1167 7412 CV 1159W1306A CV 1146 W6114 CV 1405 3776 CV 1277 7413 CV 399 ".

W1307 CV 955 W6138 CV 961 3777 CV 1118 7414 CV 1163W1308 CV 956 W6138A CV 987 3794 CV 1237 7415 CV 1260

W1525 CV 1280 W6389 CV 974 3794A CV 1238 7416 CV 1261W1526 CV. 587 W6577 CV 1410 3795 CV 1083 7417 CV 1247W1527 CV 1103 W6601 CV 962 3798 CV 1230 7418 CV 1246W1528 CV 581 W7365 (CV 21) 3807 CV 1169 7419 CV 1212W1528A CV 1932 W7366 CV 1411 3813 CV 1170 7420B CV 1209

W1529 CV 1192 W7367 CV 1408 3816 CV 1040 7420C CV 1210W1531 CV 1941 W7368 CV 1403 3822 CV 1262 7425 CV 1215W1532 CV 1193 W7369 CV 24 3828 CV 1263 7426 (CV 2788)W1533 CV 1074 W7370 CV 1407 3830 CV 1219 7429 CV 1224W1534 CV 1194 W7371 CV 1413 3832 CV 1168 7430 CV 1214

... Specially selected valve for D.A/S.M. Normal valve is CV 1320. t Specially selected DLSI0. Normal switch is CV 190•

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Documents

Type Maker or cv No. Type Maker or cv No. Type …CEIE USA (CV2680) CS6B BTH B8B/IC STC CEIV USA CS31A /3""'1-/ CV~022. Bl2 20th CE (CV494) CE2 USA CVl764 CS7A BTH Bl2E 20th CE (CV2142)