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Valve Types and Equivalents

    
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Type
Structure
Date
Base
PDF
Sensibly equivalent to:
0/20
Triode
 
B4
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OA2403
Voltage Stabiliser
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OB2
Voltage Stabiliser
1957
B7G
108C1 108C1 6074 CV1833 CV1833 G108/1K QS1208
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OM1
Rectifier HW
1940
 
CY31 U281
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OA2WA
Voltage Stabiliser
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OM10
Triode Hexode
1940
IO
6C31 CV1581 ECH33 ECH35 X147 X61M X65
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OM3
Double Diode
1940
 
ARDD5 CV1054 EB34 VR54
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OM4
Double Diode Triode
1940
IO
6R7G AR21 CV1055 DH147 EBC33 NR48 VR55
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OM5
Pentode
1940
 
CV1056 EF36 NR49 VR56
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OM525
Magnetron
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OM5A
Pentode
1940
 
EF37
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OM5B
Pentode
1940
 
EF37A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OM5C
Pentode
1940
IO
OM5B
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OM6
Pentode
1940
IO
ARP34 CV1053 EF39 VR53 W147
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OM8
Octode
1940
 
EK32
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OM9
Pentode
1940
 
6AG6G CV1052 EL32 KT61 VT-52 VT52
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OP41
Pentode
1937
B7
Pen4B
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OP42
Pentode
1937
 
Pen4B
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
ORA
Triode
1922
B4
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
ORA-B
Triode
1922
I/S1
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
ORP11
Photocell
1959
7633
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
ORP60
Photocell
1959
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
ORP90
Photocell
1958
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OS40/1250
Pentode
1947
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OS41/1250
Pentode
1947
 
804 CV624
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OS75/60
Thyratron
 
 
CV434
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
Osglim
Neon Tube (Trade Name)
 
CV71
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OTH231
Thyratron
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OTK-4
Triode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OTK17
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OZ4
Rectifier FW
 
 
CV692
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
OZ4A
Rectifier FW
 
 
CV517
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