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Valve Types and Equivalents

    
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Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1A3
Diode
1943
B7G
1D13 CV753 DA90
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1A5G
Pentode
1940
IO
CV755
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1A5GT
Pentode
1940
IO
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1A7
Rectifier FW
1935
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1A7G
Heptode
1937
 
CV1800
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1A7GT
Heptode
1937
IO
CV1802 DK32 VT-147 X14
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1AB5
Pentode
1949
B8B
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1AB6
Heptode
1955
B7G
1C3 DK96 DK98 X25
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1AC6
Heptode
 
B7G
1C2 DK92 X18 X20
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1AH5
Diode Pentode
1953
 
1FD1 DAF96 ZD25
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1AJ4
Pentode
1953
B7G
1F1 DF96 W25
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1B3GT
Rectifier EHT
1946
IO
1G3GTA 1Z7S CV1830
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1B35A
TB Cell (X-Band)
 
 
BS412
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1B59
Glow Modulator
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1B7GT
Heptode
1940
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1B5L
Double Diode Triode
 
 
1H6G
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1C1
Heptode
1947
B7G
1R5 CV782 DK91 X17
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1C2
Heptode
1952
B7G
1AC6 DK92 X18 X20
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1C3
Heptode
1957
 
1AB6 DK96 X25
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1C5G
Pentode
1940
 
CV1803 DL35 N14
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1C5GT
Pentode
1941
IO
1C5GT/G CV1803 DL35 N14
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1C5GT/G
Pentode
1941
IO
1C5GT CV1805 DL35 N14
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1C6
Heptode
1934
UX6
1C6S
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1C610
Triode
 
B4
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1C6E
Heptode
1936
UX6
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1C6F
Heptode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1CP1
Cathode-Ray Tube
1953
B8B
CV2302 DH3/91
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1D13
Diode
 
 
1A3 CV753 DA90
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1D5
Rectifier HW
1935
B5
405UA 40SUA C10B CV1267 RZ U4020 UR1C
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1D5GP
Pentode
1937
 
CV705
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1D5GT
Tetrode
1940
B5
CV1806
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1D6
Rectifier HW
1947
UX6
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1D7
Heptode
1937
IO
1A6
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1D8GT
Diode Triode Pentode
1941
IO
CV1811 VT-148
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1E7G
Double Pentode
1936
IO
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1E7GT
Double Pentode
 
CV1812
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1EP1
Cathode-Ray Tube
1956
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1F1
Pentode
1953
 
1AJ4 DF96 W25
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1F2
Pentode
 
 
1L4 CV1758 DF92
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1F3
Pentode
 
 
1T4 CV785 DF91 W17
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1F4
Pentode
1936
UX5
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1F5
Pentode
1936
 
1F5G KL35
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1F5G
Pentode
1936
IO
1F5 KL35
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1F6
Double Diode Tetrode
1936
UX6
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1F7G
Double Diode Tetrode
1937
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1FD1
Diode Pentode
1953
 
1AH5 DAF96 ZD25
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1FD9
Diode Pentode
1947
B7G
1S5 CV784 DAF91 ZD17
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1G35P
Thyratron (Hydrogen)
 
 
FX2505
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1G45P
Thyratron (Hydrogen)
 
 
FX227
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1G4GT/G
Triode
 
CV1817
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1G6G
Double Triode
1939
IO
1G6 CV772
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1H33
Heptode
 
 
DK91
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1H4G
Triode
1936
IO
CV774
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1H5
Diode Triode
1939
 
CV1818
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1H5G
Diode Triode
1940
 
CV1818
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1H5GT
Diode Triode
1940
IO
CV1820 DAC32
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1H6G
Double Diode Triode
1937
IO
1B5L
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1J5G
Power Pentode
1938
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1J6G
Double Triode (Class B)
1936
IO
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1K24
Rectifier HW
 
 
3B24W
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1L4
Pentode
1941
B7G
1F2 CV1758 DF92
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1LA4
Power Pentode
1940
B8B
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1LA6
Heptode
1939
B8B
CV775
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1LA6E
Heptode
1940
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1LB4
Pentode
1939
B8B
CV776
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1LC6
Heptode
1939
B8B
CV778 VT-178
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1LD5
Diode Pentode
1939
B8B
CV779
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1LE3
Triode
1940
B8B
VT-239
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1LG5
Pentode
1949
B8B
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1LH4
Diode Triode
1940
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1LN5
Pentode
1940
B8B
CV781
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1M1
Tuning Indicator
 
B8D & B8D/F
1M3 1N3 DM70 DM71 Y25
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1M3
Tuning Indicator
 
 
DM70
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1N3
Tuning Indicator
 
 
DM71
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1N5G
Pentode
1937
IO
CV1821 DF33 Z14
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1N5GT
Pentode
1937
IO
1N5G CV1823 DF33 VT-146 Z14
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1N6G
Diode Power Pentode
1940
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1P1
Pentode
1953
 
3C4 DL96 N25
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1P10
Pentode
 
 
3S4 CV820 DL92 N17
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1P11
Pentode
1946
B7G
3V4 DL94 N19
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1P11/3V4
Pentode
1946
 
3V4 DL94 N19
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1P39
Photocell
1946
CE29 IP39
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1P40
Photocell
1946
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1P5GT
RF Pentode
1940
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1Q5
Tetrode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1Q5G
Tetrode
1940
 
CV1824
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1Q5G/GT
Tetrode
1940
IO
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1Q5GT
Tetrode
1940
 
CV1826
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1R5
Heptode
1945
B7G
1C1 CV782 DK91 X17
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1R5/DK91
Heptode
1949
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1S2
Rectifier EHT
1955
 
DY86
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1S2A
Rectifier HW
1955
 
DY87
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1S4
Pentode
1940
B7G
CV783 DL91
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1S5
Diode Pentode
1938
B7G
1FD9 CV784 DAF91 ZD17
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1S5/DAF91
Diode Pentode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1T2
Rectifier EHT
 
 
U37
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1T4
Pentode
1940
B7G
1F3 CV785 DF91 VT-173 W17
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1T4/DF91
Pentode
1947
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1T5GT
Beam Tetrode
1939
IO
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1U4
Pentode
1946
B7G
CV2507 DF904 DT153
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1U5
Diode Pentode
1945
B7G
CV3912
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1V
Rectifier HW
1939
UX4
6Z3 CV1999
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1V2
Rectifier EHT
1950
B9A
CV3994
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
1X2B
Rectifier EHT
1955
B9A
CV5427 R19+C358
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