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Valve Types and Equivalents

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Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A …
M-OV A-Series valves

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A0897
Triode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A110
Triode
1925
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A1178
Triode
1939
Ct4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A11B
Rectifier FW
1935
B4
IW4-350

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A11C
Rectifier FW
1936

UU5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A11D
Rectifier FW
1936
B4
IW4-350 UU5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A1320
Tuning Indicator

IO
CV51 Y65

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A141
Bi-Grid

B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A15
Pentode
1937
IO

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A1714
Triode

B7G
CV408

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A1820
Tetrode
1938
B8B
CV409

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2/DC/S
Concentrated Arc Lamp

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A207
Rectifier HW
1960

CV2160 CV8051

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2087
Noise Diode
1959
B7G
CV2171

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A20B
Double Diode
1934
B5
2D4A CV1119 D41 V914 VR119

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A211
Triode
1937
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2134
Pentode

B7G
CV2179 CV4062 CV4065

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2196
Triode

CV3920

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2244
Triode

CV3921

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2272
Rectifier EHT
1955

CV2318

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2293
Triode

CV4079

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A237
Rectifier HW
1960

CV482

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A239
Rectifier HW
1957

3B24W CV2858

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2521
Triode
1957
B9A
CR4 CV2453

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2599
Triode
1960
B9A
6CT4 CV5242

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2674
Pentode
1960
B9D
436A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2688
Triode
1959
B7G
CV4081

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2792
Shunt Stabiliser

B9A
CV6097

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A27D
Pentode

CV519 Pen4DD

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2900
Double Triode
1963
B9A
CV6091

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2913
Triode
1940
B7G
CV4107 CV5413

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A292
Rectifier HW
1965

CV5998

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A2975
Triode

B7G
A1714 CV10813

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A3064
Pentode
1963

CV4014

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A3283
Pentode
1956
CV4062

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A3343
Triode
1954
CV3544 DET23

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A36A
Triode Hexode
1936
B7
TH4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A373
Diode

CV1184 NR62

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A39A
Tuning Indicator
1936
Ct8
TV4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A40
Acorn Triode
1939

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A40.
Thermal Delay Switch

B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A410
Triode
1924
B4
PR37

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A420
Triode
1931
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A4388
Beam Tetrode
1946

50B5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A440N
Triode
1932
B5
41MH 904V AC/2HL MH41

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A441
Bi-Grid

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A45
Triode
1925
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A50A
Pentode
1935
B7
SP4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A50B
Pentode

SP4B

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A50P
Pentode
1936
B7
VP4B

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A520
Triode
1932
B5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A577
Triode
1936
B5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A580
Triode

B4
CV1716 E1541 POVT167

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A70B
Pentode
1936

7A2 AC/Pen

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A70C
Pentode
1935
B7
7A3 AC2/Pen

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A70D
Pentode
1936
B7
PenA4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A70E
Pentode
1937

PenB4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A80A
Octode

B7
15A2 FC4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A915
Pentode

CV1462

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AB500
Triode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/2Pen
Pentode
1933
B7
7A3 A70C CV2808 KT41 N41 PT4 Pen4UB PenA4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/DD
Double Diode
1932

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/DD4A
Double Diode

B5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/DDT
Double Diode Triode
1934

MHD4 TDD4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/DDTR
Double Diode Triode

B7
MHD4 TDD4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/G
Triode
1927
Misc

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/HL
Triode
1929
B5
354V 41MHL A30D AR17 CV399 CV1037 CV2811 D4 HL4 MH4 MHL4 NR31 VR37

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/HLDD
Double Diode Triode
1933
B7
11A2 A234 CV2813 DDT4 DDT DH42 H4D MHD4 TDD4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/HLDDD
Triple Diode Triode
1934

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/HPen
Pentode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/ME
Tuning Indicator
1937
B7

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/OC4
Octode

B7

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/P
Triode
1929
B5
CV1179 CV2815 ML4 NR57

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/P1
Triode
1928

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/P4
Triode
1937

CV207 CV1190 CV1198

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/Pen
Pentode
1930
B7
7A2 A70B APP4A CV1174 KT42 MKT4/5 MKT4/7 MP/Pen N40 Pen4VA

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/R
Triode
1927
Misc

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/S1VM
Pentode
1932
B5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/S2
Tetrode
1931

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/S2Pen
Pentode
1933
B7
8A1 AC/SG CV1282 CV1282 HP410C MS/Pen MSP4 NR65 SPT4A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/SG
Tetrode
1929
B5
8A1 AC/S2Pen CV1164 CV2822 HP4101C MS/Pen MSP4 SP4 SPT4A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/SGVM
Tetrode
1932
B5
AS4125 AS4125 CV1165 MM4V MVS-Pen VMS4B VP4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/SP1
Pentode
1936
B7
CV2820

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/SP3
Pentode
1937
B7
CV2823 TSP4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/SP3/RH
Pentode
1958

CV1430

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/TH1
Triode Heptode
1936
B7
20A1 41STH 4THA AS4125 CV2830 MM4V TH4/A/B TH4B X41

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/TH1A
Triode Heptode
1938

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/TP
Triode Pentode
1934
B9
TP4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/VHPB
Pentode

B7

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/VM
Tetrode

B5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/VMSG
Tetrode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/VMSG12
Tetrode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/VP1
Pentode
1934
B7
9A1 A50M CV518 HP4106C MVS-Pen VMP4G VP4A VP4 VPT4B

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/VP2
Pentode
1936
B7
A50P CV2832 MVS/PenB VP4B W42

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC/VS
Vari-μ tetrode

B5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC042
Triode
1937
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC044
Triode
1930
B4
4XP LP4 P12/250 PP3/250 PX4 S30C

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC064
Output Triode
1930

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC104
Output Triode
1930
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC2/HL
Triode
1931
B5
41MHL 41MH 904V A30B CV2806 HLA1 HLA2 MH41 MH4 NH41

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC2/P
Triode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC2/Pen
Pentode
1933
B7
7A3 A70C CV2808 KT41 N41 PT4 Pen4UB PenA4 TL44

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC2/PenDD
Double Diode Pentode
1934
B7
DDPP4B DN41 PT4D

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC4/Pen
Pentode
1937

ARP8 CV1326

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC5/Pen
Pentode
1938
B7
CV2809 PT10

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC5/PenDD
Double Diode Pentode
1938
B7
CV1196 NR87

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AC6/Pen
Pentode
1939

CV1189 NR74

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACD
Double Diode
1936

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACG
GP/Output Triode
1933

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACHF
RF Triode
1932

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACHP
RF Pentode
1934

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACL
AF/Output Triode
1933

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACL4
Triode
1933
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACM3
Triode
1954
BR1167

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACP
Output Triode
1932

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACPN
Output Pentode
1933

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACPP
Output Triode
1936

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACS2/Pen
Pentode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACS4
Tetrode (Power)

CR1100

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACS5
Tetrode (Power)

4CX5000A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACSG
RF Tetrode
1932

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT14
Triode (Power)
1954

BR140

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT16
Triode (Power)
1959

BR153

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT17
Triode (Power)

CV225

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT22
Triode (Power)

CV257

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT20
Triode (Power)

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT24
Triode (Power)

CV240 E1239 E1496 E1860

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT25
Triode (Power)

CV436 E1996

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT27
Triode (Power)
1954

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT28
Triode (Power)
1958

CV2163 VX3071

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT30
Triode (Power)

5762 CV2383 TY6-5000A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT36
Triode (Power)

AT37

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT6
Triode (Power)

AT75 CV1222 CV2825 E472+D3157 NT39

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT70
Triode (Power)

BR1160

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACT9
Triode (Power)
1959
CV28

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACVHP
VM RF Pentode
1934

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACV/P1
Pentode
1934
B7
A50M AC/VP1 CV518 MVS-Pen VP4A VP4 VPT4B

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACV/P2
Pentode
1938

A50P AC/VP2 MVS/PenB VP4B VP4B W42

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ACVS
VM RF Tetrode
1933

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AD/P4
Triode

C1198 NR94

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AD1
Thermal Delay Switch

CV1314 DLS10

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AD101
Triode
1944
B5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ADG
Output Triode
1934

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ADHF
Triode
1934

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ADHP
RF Pentode
1934

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ADL
Output Triode
1934

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ADPN
Output Pentode
1933

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ADVHP
VM RF Pentode
1934

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AF100
Pentode
1940

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AF2
VM Pentode
1947

TF2 VAF2 WE25

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AF22-10
Radar CRT
1959

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AF3
Pentode

Ct8
CV2833

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AF31-10
Radar CRT
1959

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AFN202

CV3

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AFX203
Thyratron (Xenon)
1954
UX4
CV2868

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AFX212
Thyratron (Xenon)

6D4 CV1949

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AFX234
Thyratron (Xenon)

CV5023

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AG5209
Voltage Reference Tube
1958

0G3 QS1209/5651

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AG5210
Voltage Stabiliser
1958

0B2 CV1833 CV8162

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AG5211
Voltage Stabiliser
1958

0A2 CV1832 CV8161

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AG8
Octode
1940
IO
EK32 OM8

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AG869B
Rectifier MV
1952

869B

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AH201
Rectifier HW
1952

2V/400A 3B28 866A CV32 ESU866 RG3-250A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AH205
Rectifier MV
1954

CV2673

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AH211A
Rectifier MV
1959

CV532

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AH213
Rectifier MV
1957

869B

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AH217
Rectifier MV

4064B 872 872A CV642 ESU872

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AH221
Rectifier MV
1959

CV5 CV1435 ESU200 GU21 RG4-1250

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AH238
Rectifier MV
1963

CV1629

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AH2511
Rectifier MV
1969

6693

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AL1
Pentode
1959

CV159

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AL13-36
Radar CRT
1957

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

Al22-10
Radar CRT
1959

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AL31-10
Radar CRT
1959

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AL4
Output Pentode
1936

4E1 4L4 A4FF4 NLP61 OSW3103 RAL4 TAL4 TL44 UAL4 WE38

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AL60
Pentode

B7
CV9 POVT203

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AMG2/25
General Purpose Triode
1926

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AMG6/9
General Purpose Triode
1926

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AML2/30
Output Triode
1926
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AML6/25
Output Triode
1926

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AMR2/9
RF/ RCC Triode
1926

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AMR6/9
RF/Detector Triode
1926

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AMS6/100
Output Triode
1926

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AN1
Thyratron
1937
B5
CV1128 GT1C

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AP1188
Neon Wattmeter

CV264

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AP235
Bi-Grid
1927

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AP4
Acorn Pentode
1937

CV1175 CV1176

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AP406
Bi-Grid
1927

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AP4100
Rectifier FW

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AP412HF
Bi-Grid
1927

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AP412LF
Bi-Grid
1927
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AP412P
Bi-Grid (Output)
1927
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AP412RC
Bi-Grid
1927

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AP412SG
Bi-Grid
1927

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AP412U
Bi-Grid
1927

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AP4200
Rectifier FW
1933

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AP425P
Bi-Grid
1927

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

APNDH
Output Pentode
1936

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

APP4A
Pentode
1936

7A2 A70B AC/Pen CV1683 KT42 MKT4/5 MKT4/7 MP/Pen N40 P4VA Pen4VA

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

APP4B
Pentode
1936

42MP/Pen 7A2 7A3 A70C AC2/Pen CV1181 KT41 N41 PT4 Pen4VB PenA4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

APP4C
Pentode
1936
B7
CV1684

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

APP4G
Pentode
1939
B7
ARP10 CV1329

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

APV4
Rectifier FW
1936
B4
1867 1W4-350 CV1039 MU14 R3 R42 UU5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

APV4200
Rectifier FW
1933
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

A.R.
Triode
1922

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AR
Triode
1922
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AR.06
Triode
1923
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AR10T
Ignitron

BK24/5552A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AR14T
Ignitron

BK42/5551A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AR3
Triode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AR31
Ignitron

BK66/5550

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AR4100
Triode
1930
B5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AR4101
Triode
1931
B5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ARDE
Triode
1923
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AS4100
Tetrode
1930
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AS4120
Tetrode
1933
B5
MS4B

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AS4125
Tetrode
1933
B5
AC/SGVM CV1165 MVS-Pen VMS4B VP4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

ASG5017
Thyratron (Mercury Vapour)
1953

BT19 CV1144

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AT4
Acorn Triode
1937

CV1171

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

Audiovisor
Photocell
1931

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AV11
Rectifier HW
1941
UX4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AV33
Control Diode

IO

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AV44
Control Diode
1960
IO

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AVC2
Diode Pentode
1933
B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AW13-36
TV Viewfinder CRT
1958

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AW17-20
TV Monitor CRT
1961

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AW22-10
TV Monitor CRT
1957

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AW36-20
TV CRT
1957

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AW36-20Z
TV CRT
1957

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AW36-21
TV CRT
1957

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AW36-48
TV Monitor CRT
1961

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AW43-48
TV Monitor CRT
1961

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX105
Thyratron

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX228
Rectifier (Xenon)
1960

CV5 CV2399

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX255
Thyratron

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX260
Thyratron

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX4-125A/4D21
Tetrode (Power)

C1108 CV2130

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX4-250A/5D22
Tetrode (Power)

C1112 CV2131

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX50
Rectifier FW
1950

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX9903
Tetrode (Power)

C178A/5894 CV2797

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX9904
Triode (Power)

BW1165

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX9904R
Triode (Power)

BR1165

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX9907

CW1100

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX9907R

CR1100

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX9910
Tetrode (Power)

C1134 CV2799

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX9911
Thyratron (Hydrogen)
1953

CV1787 CV5247 FX2505

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AX9912
Thyratron (Hydrogen)

8503 CV6022

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AZ1
Rectifier FW
1936
Ct8
CV2860

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AZ2
Rectifier FW
1936
Ct8
RGN2004 Topf-P8A WE53

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AZ3
Rectifier FW
1936
Ct8

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AZ31
Rectifier FW
1938
IO
CV2862 U143

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AZ32
Rectifier FW
1939

1868 1RV/120/350

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AZ4
Rectifier FW
1953

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AZ41
Rectifier FW
1947
B8A
CV3892

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

AZ50
Rectifier FW
1939

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

Audion
Triode
1911

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

Audion Type T
Triode
1916

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

Augetron
Electron Multiplier

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