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Valve Types and Equivalents
    
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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
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
A11B
Rectifier FW
1935
 
UU5
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:
A1714
Triode
 
 
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
 
 
CV2160 CV8051
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
A2087
Noise Diode
 
 
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:
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
 
 
CV2318
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
A2293
Triode
 
 
CV4079
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
A237
Rectifier HW
 
 
CV482
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
A239
Rectifier HW
 
 
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
1963
B9D
436A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
A2688
Triode
1959
B7G
CV4081
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
A27D
Pentode
 
 
CV519 Pen4DD
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
 
 
CV5998
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
A2975
Triode
 
B7G
A1714 CV10813
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
A3064
Pentode
 
 
CV4014
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
A3343
Triode
1954
CV3544 DET23
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
A373
Diode
 
 
CV1184 NR62
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
A40.
Thermal Delay Switch
 
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:
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
 
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
 
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
 
 
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/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
B4
 
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/HL+A11366
Triode
1929
 
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
 
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/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
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
B4
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AC/S1VM
Pentode
1932
 
 
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 MVSPen 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/SP3RH
Pentode
 
 
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/VMSG12
Tetrode
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AC/VP1
Pentode
1934
B7
9A1 A50M CV518 HP4106C MVSPen VMP4G VP4A VP4 VPT4B
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AC/VP2
Pentode
1936
B7
A50P CV2832 MVS/PenB VP41 VP4B W42
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:
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
1938
 
CV1189 NR74
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:
ACP4
Triode
 
 
CV1190 CV1198
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:
ACT14
Triode (Power)
 
 
BR140
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
ACT16
Triode (Power)
 
 
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:
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)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
ACT28
Triode (Power)
 
 
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 NT39
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
ACT70
Triode (Power)
 
 
BR1160
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
ACT9
Triode (Power)
 
CV28
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
ACV/P1
Pentode
1934
B7
A50M AC/VP1 CV518 MVSPen VP4A VP4 VPT4B
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
ACV/P2
Pentode
1938
 
A50P AC/VP2 MVS/PenB VP41 VP4B VP4B W42
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:
AF2
VM Pentode
 
 
TF2 VAF2 WE25
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AF3
Pentode
 
Ct8
CV2833
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
 
 
QS1209/5651
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AG5210
Voltage Stabiliser
 
 
0B2 CV1833 CV8162
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AG5211
Voltage Stabiliser
 
 
0A2 CV1832 CV8161
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AG869B
Rectifier MV
 
 
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
 
 
CV2673
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AH211A
Rectifier MV
 
 
CV532
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AH213
Rectifier MV
 
 
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
 
 
CV5 CV1435 ESU200 GU21 RG4-1250
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AH238
Rectifier MV
 
 
CV1629
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AH2511
Rectifier MV
 
 
6693
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AL1
 
 
 
CV159
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AL60
Pentode
 
B7
CV9
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:
AP4
Pentode
1937
 
CV1175 CV1176
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:
AP4100
Rectifier FW
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AP4200
Rectifier FW
1933
 
 
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
 
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:
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:
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:
AS4125
Tetrode
1933
B5
AC/SGVM CV1165 MVSPen VMS4B VP4
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
ASG5017
Thyratron (Mercury Vapour)
 
 
BT19 CV1144
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AT4
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:
AVC2
Diode Pentode
1933
B4
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AX105
Thyratron
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AX228
Xenon Rectifier
 
 
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
 
 
 
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)
 
 
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
1938
Ct8
CV2860
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AZ2
Rectifier FW
1938
 
RGN2004 Topf-P8A WE53
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
AZ3
Rectifier FW
1938
 
 
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:
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:
Augetron
Electron Multiplier
 
 
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