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Valve Types and Equivalents
    
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Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X05
Triode Hexode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X101
Triode Hexode
 
B8B
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X109
Triode Hexode
1951
B9A
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X118
Triode Hexode
1957
 
10C1 X145
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X119
Triode Hexode
1958
B9A
10C14 19D8 UCH81
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X138
Pentode
1944
B7G
CV138 EF91 V888
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X14
Heptode
1940
IO
1A7G 1A7G DK32
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X142
Triode Hexode
1950
B8A
141TH 14K7 UCH42
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X143
Triode Heptode
1949
B8B
ECH21
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X145
Triode Hexode
1947
B8A
10C1 X118
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X147
Triode Hexode
1948
IO
ECH33 ECH35 X61M X61
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X148
Triode Hexode
1948
B8B
7S7
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X150
Triode Hexode
1948
B8A
6C10 6CU7 ECH42
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X17
Heptode
1947
B7G
1C1 1R5 CV782 DK91 VT-171
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X18
Heptode
1954
B7G
1AC6 1C2 DK92
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X20
Heptode
 
 
1AC6 1C2 DK92
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X21
Heptode
1934
B7
CV3816
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X21MET
Heptode
1934
 
CV3817
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X22
Heptode
1937
B7
210PG CV1043 CV3818 VHT2A VR43
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X22MET
Heptode
1937
 
210PG CV1043 CV3818 VHT2A VR43
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X23
Triode Hexode
1938
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X24
Triode Hexode
1939
B7
220TH CV1082 CV3819
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X24MET
Triode Hexode
1939
 
CV3820
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X25
Heptode
1954
B7G
1AB6 1C3 DK96
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X30
Heptode
1934
B7
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X31
Triode Hexode
1935
B7
CV3821
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X31MET
Triode Hexode
1931
 
CV3822
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X32
Heptode
1935
 
X30
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X41
Triode Hexode
1935
B7
20A1 CV1194 CV1460 NR84
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X41MET
Triode Hexode
1935
 
20A1 41STH 4THA A36C AC/TH1 CV3823
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X42
Hexode
1936
B7
15A2 41MPG A80A CV3576 FC4 MX40 VHT4
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X481D
Reflex Klystron
1952
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X56
Triode
 
 
CV1045 VT45
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X61
Triode Hexode
1947
IO
CV3824 ECH35 OM10 X61M X65
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X61M
Triode Hexode
1940
IO
CV281 CV1944 ECH35 OM10 X147 X65
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X63
Heptode
1937
IO
6A8G CV578 CV3825
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X64
Heptode
1937
IO
ARH1 CV1280 NR67
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X65
Triode Hexode
1937
IO
CV1193 CV3826 ECH35 NR82 OM10 VR99 X147 X61M X61M
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X66
Triode Hexode
1940
IO
CV1099 CV3828 VR99
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X719
Triode Hexode
1955
B9A
6AJ8 6C12 CV2128 ECH81
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X71M
Triode Hexode
1939
IO
12K8GT X76M
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X727
Heptode
 
 
6BE6 CV453 EK90 X77
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X76
Triode Hexode
1946
IO
12K8G
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X76M
Triode Hexode
1946
IO
12K8GT X71M
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X77
Heptode
1950
 
6A2P 6BE6 CV453 EK90 X727
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X78
Triode Hexode
1949
B7G
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X79
Triode Hexode
1950
B9A
CV5115
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XA3446
Katz Adder
1950
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
X81
Triode Heptode
1947
B8B
7S7 X148
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XB1
Barretter
 
B7G
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XB2
Barretter
 
 
CV1634
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XC12
Voltage Stabiliser
1960
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XC12T
Voltage Stabiliser
1960
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XC13
Thyratron
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XC15
Voltage Stabiliser
 
 
CV5088
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XC18
Thyratron
 
 
G1/237G
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XC23
Thyratron
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XC24
Thyratron
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XC31
Thyratron
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XD
Triode
1935
Peanut
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XD1.5V
Triode
 
Peanut
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XD4
Triode
1931
 
E420
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XD60
 
 
 
CV168
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XD61
 
 
 
CV169
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XE2
Triode
1950
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFG1
Thyratron
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFR1
Subminiature RF Pentode
 
 
1AD4 CV2237 DF62
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFR2
Subminiature RF Pentode
 
 
5678 CV2254
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFR3
Subminiature VHF Triode
1956
5676 CV2239
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFR5
Subminiature RF Pentode
 
 
5678 CV2254
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFW10
Pentode
1949
Base B5A & B5B
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFW20
Pentode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFW30
Pentode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFW40
Subminiature AF Pentode
 
 
CV2260
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFW50
Pentode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY10
Pentode
1949
Base B5A & B5B
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY11
Pentode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY12
Pentode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY14
Subminiature Output Pentode
 
 
5672 CV2238 DL620
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY15
Subminiature Output Pentode
 
 
5672 CV2238
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY21
Beam Tetrode
 
Base B5A & B5B
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY22
Beam Tetrode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY23
Beam Tetrode
1950
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY31
Beam Tetrode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY32
Beam Tetrode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY33
Beam Tetrode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY34
Beam Tetrode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY35
Beam Tetrode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY41
Beam Tetrode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY42
Beam Tetrode
1953
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY43
Beam Tetrode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY51
Beam Tetrode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY53
Beam Tetrode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XFY54
Subminiature Output Beam Tetrode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XG1-2500
Thyratron
1952
MT57
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XG15-10
Triode Thyratron
1957
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XG15-12
Triode Thyratron
1957
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XG2
Tetrode Thyratron
1958
 
CV474
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XG2-12
Tetrode Thyratron
1957
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XG2-25
TriodeThyratron
1956
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XG5-500
Triode Thyratron
1957
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XGQ2-6400
Tetrode Thyratron
1952
B4D
MT105
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XH1.5
Triode
1935
Sm4
CV3830
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XH1.5V
Triode
1935
Sm4
CV3830
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XH16-200
Triode Thyratron
1955
 
5C22 CV2520 PL522
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XH25-500
Triode Thyratron
1957
 
CV3521
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XH3-045
Triode Thyratron
1958
 
3C45 CV372
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XH8-100
Triode Thyratron
1958
 
4C35 CV1787
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XJ
 
 
 
CV119
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XL601
Glow Modulator
1970
IO
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XN1
Cold Cathode Indicator Tube
1960
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XN13
Cold Cathode Indicator Tube
1960
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XN13-FA
Cold Cathode Indicator Tube
1960
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XNP12
Cold Cathode Indicator Tube
1960
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XP1.5V
Triode
 
Sm4
CV176
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XP1114
Photomultipliers
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XQ1020G
Camera Tube
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XQ1410B
Camera Tube
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XQ3457R
Camera Tube
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XR1-12
Triode Thyratron
1959
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XR1-1600
Triode Thyratron
1959
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XR1-1600A
Thyratron
1961
 
8063 CV5234 ZT1011
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XR1-3200
Triode Thyratron
1958
 
5544 CV2210
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XR1-3200A
Triode Thyratron
1960
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XR1-6400
Triode Thyratron
1959
B4D
5545
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XR1-6400A
Triode Thyratron
1959
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XR4
RF Power Pentode
 
 
6397
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XR6
Pentode
1958
 
CV465
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XR7
Pentode
1958
 
CV466
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XR8
Triode
1958
 
CV468
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XR9
Double Triode
1958
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XSG
RF Tetrode
1935
XSGSW
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XSG1.5V
Pentode
1935
Sm4
CV175
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XSG2.0V
Pentode
1935
Sm4
CV3833
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XT45A
Thermal Delay Switch
 
B7G
F9031A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XY
Pentode
1935
Sm5
XY2.0
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
XW2.0V
Pentode
 
Sm5
CV3834 XW
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