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Valve Types and Equivalents
    
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Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4
Triode
 
B4
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4/1
Cathode-Ray Tube
1937
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4/100BU
Rectifier FW
1937
 
FW4/500 U18/20
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4-125
Beam Tetrode (Power)
 
 
C1108
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4-125A
Beam Tetrode (Power)
1946
 
4D21 C1108 CV2963 QY3-125 TT16
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4-250
Beam Tetrode (Power)
 
 
C1112
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4-250A
Beam Tetrode (Power)
1946
 
C1112 QY4-250
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4-250A/5D22
Beam Tetrode (Power)
 
 
C1112
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4-400A
Beam Tetrode (Power)
 
 
C1136
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4-65A
Beam Tetrode
 
 
CV1905 QY3-65
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4-THA
Triode Hexode
1938
B7
A36C AC/TH1 CV826 TH4A TH4B
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4304CA
Power Triode
1942
UX4
834 DET12 NT58 VT62
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4AV6
Double Diode Triode
1958
B7G
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4B/550E
Tetrode (Pulse Amplifier)
 
 
C1148
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4B/551E
Tetrode (Pulse Amplifier)
 
 
C1166
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4B/602E
Tetrode (Pulse Amplifier)
 
 
C1149/1
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4B/603E
Tetrode (Pulse Amplifier)
1962
B4A
C1150/1 CV398
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4B31
Rectifier HW
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4B33
Rectifier HW
 
 
CV2518
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4B3L
Rectifier HW
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4BZ7
Double Triode
1956
 
4BQ7A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4C/603E
Tetrode (Pulse Amplifier)
1962
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4C21
Triode
1943
 
211 CV2576 VT-4C
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4C25
Triode
1938
 
CV707 HK54
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4C27
Micropup Triode
 
 
CV92 REL7
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4C28
Micropup Triode
1943
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4C35
Thyratron
1954
CV1787 FX2505 PL435 XH8-100
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4C35A
Thyratron
 
CV5247 FX2505 XH8-100
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4C35/PL435
Thyratron
 
 
FX2505
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CM4
UHF Triode
1958
B9A
PC86
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CPX250K
Tetrode (Power)
1970
8590
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CV75000A
Tetrode (Power)
 
 
CY1170J
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CW1000A
Tetrode (Power)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CW25000a
Tetrode (Power)
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CX1000A
Tetrode (Power)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CX1000K
Tetrode (Power)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CX10000D
Tetrode (Power)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CX1500B
Tetrode (Power)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CX15000A
Tetrode (Power)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CX250B
Tetrode (Power)
1960
B8F
7203
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CX250FG
Tetrode (Power)
1960
B8F
E3280
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CX300A
Tetrode (Power)
1956
8167
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CX35000A
Tetrode (Power)
1962
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CX35000C
Tetrode (Power)
1962
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4CX5000A
Tetrode (Power)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4D1
Triode
1936
 
3A/172B AR7 C30B CV1000 CV1109 DA HL1320 HL13C NR55 VR109
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4D21
Beam Tetrode
 
 
4-125A C1108 CV2963 TT16
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4D32
Beam Tetrode
1945
B7A
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4DI
Triode
1936
 
CV1000
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4DL4
Triode
 
 
PC88
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4E27
Pentode
 
 
CV824 HK257B
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4EP1
Cathode-Ray Tube
1956
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4EW6
Pentode
1959
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4F21
Tetrode (Power)
 
 
C1108
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4FNG45
Cathode-Ray Tube
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4FY5
UHF Triode
1961
 
PC97
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4GC
Photocell
 
 
814A CE2 GS117A NU2 R71A WL737
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4GP
Cathode-Ray Tube
1958
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4GSM
Photocell
 
 
3554 4GSM 50CG 868 CE1 CMG32 G8 GS146 NU.1 PJ23 R59A WL735
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4HG8
Triode Pentode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4J31
Magnetron (S-Band Pulse)
 
 
CV1914
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4J32
Magnetron (S-Band Pulse)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4J33
Magnetron (S-Band Pulse)
1945
CV1916
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4J34
Magnetron (S-Band Pulse)
 
 
CV1897 CV2744
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4J35
Magnetron (S-Band Pulse)
 
 
CV1898
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4J43
Magnetron (S-Band Pulse)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4J44
Magnetron (S-Band Pulse)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4J50
Magnetron (S-Band Pulse)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4J50A
Magnetron (X-Band Pulse)
 
 
CV2284
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4J52A
Magnetron (X-Band Pulse)
 
 
CV5018
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4J53
Magnetron (S-Band Pulse)
 
 
CV513
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4J78
Magnetron (X-Band Pulse)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4JC/201E
Tetrode (Power)
 
 
6166A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4JC/201S
Tetrode (Power)
 
 
CR192A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4KC/160M
Tetrode (Power)
1961
B8F
CCS1 Y-799
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4KM100LA
Klystron (TV Amplifier)
 
 
K376
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4KM100LF
Klystron (TV Amplifier)
 
 
K377
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4KM50000LA3
Klystron (TV Amplifier)
 
 
K365
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4KM50000LQ
Klystron (TV Amplifier)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4KM50000LR
Klystron (TV Amplifier)
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4MA7
Magnetron (Q-Band Pulse)
 
 
M5057
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4P(Gold Line)
Output Triode
1926
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4PR60A
Tetrode (Pulse Amplifier)
 
C1133
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4PR60B
Tetrode (Pulse Amplifier)
 
 
C1149/1
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4SH
Hexode
 
 
CV1126 VR126
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4THA
Triode Hexode
1938
B7
A36C AC/TH1 X41
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4TP
Triode Pentode
1939
B7
CV827
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4TPB
RF Pentode
1939
B7
CV828 CV829
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4TSA
Pentode
1938
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4TSP
Pentode
1938
B7
4.TSP CV830
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4VDE
Triode
1925
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4X140D
Beam Tetrode
 
 
CV3991
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4X150A
Beam Tetrode
 
B8F
7034 CV2519 QV1-150A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4X150D
Beam Tetrode
 
B8F
7035 CV3991
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4X150G
Beam Tetrode
 
 
CV3893 QV1-150
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4X250B
Beam Tetrode
 
 
CV2487
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4XP
Output Triode
1930
 
11P4 AC044 LP4 P12/250 PP3/250 PX4 S30C
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4Y35
Rectifier FW
1930
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4YSGAC
Pentode
1930
B5
S4VB SS4YSGAC
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
4Z60C
Rectifier FW
1942
 
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