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VT TUBE CODE CROSS REFERENCE CHART


Due to the numbering schemes in use there are three variant classifications of VTxyz valves; the USA types, the UK military types (VT = Valve, Transmitting), and the UK GPO types. In the cases tabulated below there are more than one valve for a given VT marking. This list was compiled from the CV Register and several other sources. We wish to thank Mr. Jeremy Harmer for his kind permission to allow us to post this list he has very carefully compiled. We also thank the Tube Collectors Association that host the original of this chart, along with the links here to the Virtual Valve Museum. This material is presented free of charge or commercial endorsement or obligation. It is believed to be accurate, but Brent Jessee Recording & Supply, Inc. makes no claims as to it accuracy, and is presented here for your use "as is and as found." Clicking any link on the chart will take you to data and pictures (where available) of the tube listed. This will navigate you away from the audiotubes.com site. To return to this page, click your "back" button, or previous page (return) arrow on your browser.

VT number

Made for/by

CV equivalent

Commercial
number

Description

VT1

 

 

WE-203A

 

VT2

 

 

WE-205B

 

VT3

 

 

 

 

VT4A

 

 

 

 

VT4B

 

 

211

 

VT4C

 

 

JAN 211 (VT4C)

 

VT5

 

 

WE-215A

 

VT6

 

 

212A

 

VT7

 

 

WX-12

 

VT8

 

 

UV-04

 

VT10

 

 

 

 

VT11

 

 

 

 

VT12

 

 

 

 

VT13

 

 

 

 

VT14

 

 

 

 

VT16

 

 

 

 

VT17

GPO

CV1608

 

 

USA

CV640

860

 

VT18

 

 

 

 

VT19

GPO

CV1612

 

 

USA

CV641

861

 

VT20

 

 

 

 

VT21

 

 

 

 

VT22

 

 

204A

 

VT23

 

 

 

 

VT24

GPO

CV1636

 

 

USA

CV2675

864

 

VT25

UK

CV1025

 

 

GPO

CV1637

 

 

USA

CV603

10

 

VT25A

 

 

10 special

 

VT26

UK

CV1026

 

 

GPO

CV1600

 

 

USA

 

26

 

VT27

GPO

CV1601

 

 

USA

CV604

30

 

VT28

 

 

24, 24A

 

VT29

 

 

27

 

VT30

UK

CV1030

 

 

USA

CV750

0-1A

 

VT31

UK

CV1031

 

 

GPO

CV1638

 

 

USA

CV947

31

 

VT32

 

 

 

 

VT33

GPO

CV1642

 

 

USA

CV949

33

 

VT34

UK

CV1034

 

 

GPO

CV1614

 

 

USA

 

207

 

VT35

GPO

CV1615

 

 

USA

CV1752

35/51

 

VT36

GPO

CV1602

 

 

USA

CV1775

36

 

VT37

 

 

37

 

VT38

GPO

CV1645

 

 

USA

CV712

38

 

VT39

 

 

869

 

VT39A

 

 

869A

 

VT40

GPO

CV1647

 

 

USA

CV2501

40

 

VT41

 

 

851

 

VT42

 

 

872

 

VT42A

 

 

872A special

 

VT43

 

 

845

 

VT44

 

 

32

 

VT45

 

 

45

 

VT46

UK

CV1046

 

 

GPO

CV1616

 

 

USA

(CV32)

866

 

VT46A

 

 

866A

 

VT47

UK

CV1047

 

 

GPO

CV1603

 

 

USA

CV1772

47

 

VT48

 

 

41

 

VT49

 

 

39/44

 

VT50

UK

CV1050

 

 

USA

CV2533

50

 

VT51

UK

CV1051

 

 

GPO

CV1617

 

 

USA

 

841

 

VT52

UK

CV1052

 

 

GPO

(CV1025)

 

 

USA

CV596

45 special

 

VT53

 

 

(VT42A)

 

VT54

GPO

CV1618

 

 

USA

CV1751

34

 

VT55

 

 

865

 

VT56

GPO

CV1648

 

 

USA

CV611

56

 

VT57

GPO

CV25

 

 

USA

CV612

57

 

VT58

UK

CV1058

 

 

GPO

CV1619

 

 

USA

CV613

58

 

VT60

UK

CV1060

(VT60)

 

GPO

CV1605

 

 

USA

 

850

 

VT60A

 

 

(VT60A)

 

VT61

UK

CV1061

(VT61)

 

GPO

CV1609

 

 

VT61A

 

 

(VT61A)

 

VT62

UK

CV1062

 

 

GPO

CV1606

 

 

USA

CV621

801, 801A

 

VT63

 

 

46

 

VT64

 

 

800

 

VT65

GPO

CV1649

 

 

USA

CV582

6CG

 

VT65A

 

 

6C5G

 

VT66

GPO

CV1650

 

 

USA

CV1912

6F6

 

VT66A

 

 

6F6G

 

VT67

 

 

30 special

 

VT68

GPO

CV1651

 

 

USA

CV1891

6B7

 

VT69

GPO

CV1652

 

 

USA

CV1900

6D6

 

VT70

 

 

6F7

 

VT72

 

 

842

 

VT73

UK

CV1073

 

 

USA

CV639

843

 

VT74

UK

CV1074

 

 

GPO

CV1654

 

 

USA

CV1864

5Z4

 

VT75

UK

CV1075

 

 

GPO

CV1655

 

 

USA

CV614

75

 

VT76

UK

CV1076

 

 

USA

CV615

76

 

VT77

 

 

77

 

VT78

GPO

CV1656

 

 

USA

CV2544

78

 

VT79

 

 

KT8C

 

VT80

UK

CV1080

 

 

USA

CV617

80

 

VT81

UK

CV1081

 

 

GPO

CV1659

 

 

VT82

GPO

CV1660

 

 

VT83

 

 

83

 

VT84

 

 

84 / 6Z4

 

VT86

GPO

CV1662

 

 

USA

CV1942

6K7

 

VT86A

 

 

6K7G

 

VT86B

 

 

6K7GT

 

VT87

GPO

CV1663

 

 

USA

CV1951

6L7

 

VT87A

 

 

6L7G

 

VT88

UK

CV1088

 

 

GPO

CV1664

 

 

USA

CV1963

6R7

 

VT88A

 

 

6R7G

 

VT88B

 

 

6R7GT

 

VT89

UK

CV1089

 

 

GPO

CV1665

 

 

USA

CV833

89

 

VT90

UK

CV1090

 

 

GPO

CV1732

(PO VT90)

 

USA

CV1930

6H6

 

VT90A

 

 

6H6GT

 

VT91

GPO

CV1038

 

 

USA

CV1936

6J7

 

VT91A

 

 

6J7GT

 

VT92

GPO

CV1735

 

 

USA

CV588

6Q7

 

VT92A

 

 

6Q7G

 

VT93

UK

CV1093

 

 

GPO

CV1666

 

 

USA

CV1894

6B8

 

VT93A

 

 

6B8G

 

VT94

UK

CV1094

 

 

GPO

CV1667

 

 

USA

CV1933

6J5

 

VT94A

 

 

6J5G

 

VT94B

 

 

6J5 specialy selected

 

VT94C

 

 

6J5G specially selected

 

VT94D

 

 

6J5GT

 

VT95

GPO

CV1668

 

 

USA

CV1831

2A3

 

VT96

UK

CV1096

 

 

USA

CV1957

6N7

 

VT96B

 

 

6N7 specially selected

 

VT97

 

 

5W4

 

VT98

UK

CV1098

(VT98)

 

GPO

CV1669

 

 

USA

CV504

6U5 / 6G5

 

VT98A

 

 

(VT98A)

 

VT99

 

 

6F8G

 

VT100

GPO

(CV1670)

 

 

USA

(CV124)

807

 

VT100A

 

 

807 modified

 

VT101

 

 

837

 

VT102

 

 

cancelled

 

VT103

 

 

6SQ7

 

VT104

UK

CV1104

(VT104)

 

GPO

CV1040

 

 

USA

CV546

12SQ7

 

VT105

UK

CV1105

(VT105)

 

GPO

CV1673

 

 

USA

CV1969

6SC7

 

VT106

GPO

CV1674

(VT106)

 

USA

CV623

803

 

VT107

GPO

CV1675

 

 

USA

CV510

6V6

 

VT107A

 

 

6V6GT(/G)

 

VT107B

 

 

6V6G

 

VT108

 

 

450TH

 

VT109

GPO

CV1677

 

 

USA

CV1798

2051

 

VT111

GPO

CV1679

 

 

USA

CV836

5BP4 / 1802P4

 

VT112

GPO

CV1680

 

 

USA

CV660

6AC7 / 1852

 

VT114

UK

CV1114

 

 

GPO

CV1682

 

 

USA

CV1846

5T4

 

VT115

GPO

CV1683

(PO VT115)

 

USA

CV1948

6L6

 

VT115A

 

 

6L6G

 

VT116

GPO

CV1684

 

 

USA

CV591

6SJ7

 

VT116A

 

 

6SJ7GT

 

VT116B

 

 

6SJ7Y

 

VT117

 

 

6SK7

 

VT117A

 

 

6SK7GT

 

VT118

 

 

832

 

VT119

GPO

CV1169

 

 

USA

(CV597)

2X2 / 879

 

VT120

GPO

CV1688

 

 

USA

(CV1095)

954

 

VT121

 

 

955

 

VT122

 

 

530

 

VT123

 

 

RCA A5586 superceded by VT128

 

VT124

 

 

1A5GT

 

VT125

GPO

CV1689

 

 

USA

CV1805

1C5GT

 

VT126

GPO

CV1690

 

 

USA

CV573

6X5

 

VT126A

 

 

6X5G

 

VT126B

 

 

6X5GT

 

VT127

UK

CV1127

(VT127)

 

GPO

(CV1187)

 

 

 

 

special

 

VT127A

GPO

 

(PO VT127A)

 

 

 

(VT127A)

 

VT128

GPO

CV1692

 

 

USA

CV2715

1630

 

VT129

 

 

304TL

 

VT130

 

 

250TL

 

VT131

GPO

CV1168

 

 

USA

CV543

12SK7

 

VT132

 

 

12K8 special

 

VT133

GPO

CV1695

 

 

USA

CV700

12SR7

 

VT134

 

 

12A6

 

VT135

 

 

12J5GT

 

VT135A

 

 

12J5

 

VT136

GPO

CV1118

 

 

USA

CV659

1625

 

VT137

GPO

CV1081

 

 

USA

CV1755

1626

 

VT138

GPO

CV1623

 

 

USA

CV1756

1629

 

VT139

GPO

CV399

 

 

USA

(CV216)

VR150/30

 

VT140

GPO

CV1166

 

 

USA

(CV662)

1628

 

VT141

 

 

531

 

VT142

 

 

WE-39DY1

 

VT143

GPO

CV1696

 

 

USA

CV625

805

 

VT144

GPO

CV1371

 

 

USA

(CV26)

813

 

VT145

GPO

CV243

 

 

USA

CV1861

5Z3

 

VT146

GPO

CV1625

 

 

USA

CV1823

1N5GT

 

VT147

GPO

CV1697

 

 

USA

CV1802

1A7GT

 

VT148

GPO

CV1698

 

 

USA

CV1811

1D8GT

 

VT149

 

 

3A8GT

 

VT150

GPO

CV1699

 

 

USA

CV1966

6SA7

 

VT150A

GPO

CV1700

 

 

USA

CV1967

6SA7GT

 

VT151

GPO

CV1701

 

 

USA

CV578

6A8G

 

VT151B

 

 

6A8GT

 

VT152

GPO

CV1702

 

 

USA

CV1940

6K6GT

 

VT152A

 

 

6K6G

 

VT153

GPO

CV1703

 

 

USA

CV837

12C8 special

 

VT154

GPO

CV1067

 

 

USA

CV629

814

 

VT155

 

 

special

 

VT156

 

 

special

 

VT158

 

 

Zahl tube

 

VT158

 

 

special

 

VT159

 

 

special

 

VT160

 

 

special

 

VT161

GPO

CV1710

 

 

USA

CV537

12SA7

 

VT162

GPO

CV1711

 

 

USA

CV697

12SJ7

 

VT163

GPO

CV1712

 

 

USA

CV1896

6C8G

 

VT164

GPO

CV1713

 

 

USA

CV723

1619

 

VT165

 

 

1624

 

VT166

 

 

371A

 

VT167

GPO

CV1716

 

 

USA

CV1945

6K8

 

VT167A

 

 

6K8G

 

VT168A

 

 

6Y6G

 

VT169

GPO

CV1717

 

 

USA

CV531

12C8

 

VT170

GPO

CV1718

 

 

USA

CV766

1E5-GP

 

VT171

GPO

CV1719

 

 

USA

CV782

1R5

 

VT171A

 

 

1R5 (loktal)

 

VT172

 

 

1S5

 

VT173

 

 

1T4

 

VT174

 

 

3S4

 

VT175

 

 

1613

 

VT176

 

 

6AB7 / 1853

 

VT177

GPO

CV1720

 

 

USA

CV780

1LH4

 

VT178

GPO

CV1721

 

 

USA

CV778

1LC6

 

VT179

GPO

CV1722

 

 

USA

CV781

1LN5

 

VT180

GPO

CV1053

 

 

 

 

3LF4

 

VT181

GPO

CV1052

 

 

USA

CV1790

7Z4

 

VT182

GPO

CV1723

 

 

USA

CV811

3B7 / 1291

 

VT183

GPO

CV1724

 

 

USA

CV2709

1R4 / 1294

 

VT184

 

 

VR90/30

 

VT185

GPO

CV245

 

 

USA

CV815

3D6 / 1299

 

VT186

 

 

special

 

VT187

 

 

575A

 

VT188

GPO

CV1727

 

 

USA

CV891

7E6

 

VT189

GPO

CV1128

 

 

USA

CV893

7F7

 

VT190

GPO

CV1728

 

 

USA

CV895

7H7

 

VT191

GPO

CV1628

 

 

USA

CV683

316A

 

VT192

 

 

7A4

 

VT193

GPO

CV1100

 

 

USA

CV1777

7C7

 

VT194

GPO

CV587

 

 

USA

CV897

7J7

 

VT195

GPO

CV1863

 

 

USA

CV2874

1005

 

VT196

GPO

CV509

 

 

USA

(CV574)

6W5G

 

VT197A

 

 

5Y3GT/G

 

VT198A

 

 

6G6G

 

VT199

GPO

CV124

 

 

USA

CV1993

6SS7

 

VT200

GPO

CV1065

 

 

USA

CV686

VR105/30

 

VT201

GPO

CV1056

 

 

USA

CV552

25L6

 

VT201C

 

 

25L6GT

 

VT202

GPO

CV1054

 

 

USA

CV664

9002

 

VT203

GPO

CV9

 

 

USA

CV665

9003

 

VT204

GPO

CV18

 

 

USA

CV789

HK-24G

 

VT205

GPO

CV1630

 

 

USA

CV1996

6ST7

 

VT206A

 

 

5V4G

 

VT207

GPO

CV1091

 

 

USA

CV529

12AH7GT

 

VT208

 

 

7B8

 

VT209

 

 

12SG7

 

VT210

 

 

1S4

 

VT211

 

CV1978

6SG7

 

VT212

 

 

958

 

VT213A

 

 

6L5G

 

VT214

 

 

12H6

 

VT215

 

 

6E5

 

VT216

 

 

816

 

VT217

 

 

811

 

VT218

 

 

100TH

 

VT219

 

 

 

 

VT220

 

 

250TH

 

VT221

 

 

3Q5GT

 

VT222

 

 

884

 

VT223

 

 

1H5GT

 

VT224

 

CV18

RK-34

 

VT225

 

 

307A

 

VT226

 

 

3EP1 / 1806P1

 

VT227

 

 

7184

 

VT228

 

 

8012

 

VT229

 

 

6SL7GT

 

VT230

 

 

350A

 

VT231

 

 

6SN7GT

 

VT232

 

CV6

E1148

 

VT233

 

 

6SR7

 

VT234

 

 

HT-114B

 

VT235

 

 

HY-615

 

VT236

 

 

836

 

VT237

 

 

957

 

VT238

 

 

956

 

VT239

 

 

1LE3

 

VT240

 

 

710A

 

VT241

 

 

7E5 / 1201

 

VT243

 

 

7C4 / 1203A

 

VT244

 

 

5U4G

 

VT245

 

 

2050

 

VT246

 

 

918

 

VT247

 

 

6AG7

 

VT248

 

 

1808P1

 

VT249

 

 

1006

 

VT250

 

 

EF50

 

VT251

 

 

441

 

VT252

 

 

923

 

VT254

 

 

304TH

 

VT255

 

 

705A

 

VT256

 

 

ZP486

 

VT257

 

 

K-7

 

VT259

 

 

829

 

VT260

 

 

VR75/30

 

VT264

 

 

3Q4

 

VT266

 

 

1616

 

VT267

 

 

578

 

VT268

 

 

12SC7

 

VT269

 

 

717A

 

VT277

 

 

417

 

VT279

 

 

GY-2

 

VT280

 

 

C7063

 

VT281

 

 

HY-145ZT

 

VT282

 

 

ZG489

 

VT283

 

 

QF-206

 

VT284

 

 

QF-197

 

VT285

 

 

QF-200C

 

VT286

 

 

832A

 

VT287

 

 

815

 

VT288

 

 

12SH7

 

VT289

 

 

12SL7GT

 

VT501

UK

CV1501

 

Beam tetrode