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Valve Types and Equivalents

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Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2-01C
UHF Diode
1958
EA53

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2A
Photocell

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2A3
Output Triode
1935
UX4
CV1831

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2A4G
Thyratron
1940

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2A5
Output Pentode
1932
UX6
CV1834

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2A6
Double Diode Triode
1933
UX6
A4006B CV1769 PH2A6 UZ2A6

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2A7
Heptode
1936
UX7
CV787

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2AHL
Triode

VT158

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2AP1
Cathode-Ray Tube
1944

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2B
Barretter

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2B21
Rectifier EHT
1939

2X2A 2X2 879 CV597

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2B22
Planar Diode
1945
IO
559 CV2931 GL2B22 GL559

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2B35
Diode

6D1 EA50

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2B4
Thyratron

885 CV648

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2B52
Tetrode (Power)

C1134

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2B7
Double Diode Pentode
1936

CV1837

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2B94
Tetrode (Power)

C178A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2BP1
Cathode-Ray Tube

B12A
CV3678

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C21
Double Triode
1943

1642 CV875 RK33

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C22
Triode
1943

7193 CV792

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C26
Triode
1943

CV802

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C26A
Triode
1944
IO
CV1759

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C34
Double Triode
1938
UX7
4074A CV18 DET19 RK34 VT-224

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C36
Triode
1946
CV3965 SB846

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C39
Triode

CV3940

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C39A
Triode

CV2516 TD1-100

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C40
Triode
1940

446B CV687 CV2643

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C40A
Triode
1961

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C42
Planar Triode

IO
CV2932 TD3-12

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C43
Triode
1945
IO
464A CV688

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C46
Triode

IO
CV2933

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C51
Double Triode
1960
B9A
396A 5670 CV2831

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2C51W
Double Triode

CV2866

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2CW4
Nuvistor Triode
1964

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2D1
Rectifier FW

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2D13
Double Diode
1934
Ct5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2D13A
Double Diode
1935
Ct5
DDA/13L

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2D13C
Double Diode
1935
B5
10D1 ARDD1 CV796 CV1300 DDA/13 ZD

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2D2
Diode
1937
B5
CV794

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2D21
Thyratron
1944
B7G
20A3 4G/280K 5121 5727 ASG5121 CV797 E1955 EN91 G4S2 PL21 PL2D21 QX21 Ste1300/01/05 WT-210-0001

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2D21W
Thyratron
1958
B7G
CV2876

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2D4
Double Diode
1934

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2D4A
Double Diode
1934
B5
A20B D41 DDL4 TB24 V914

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2D4B
Double Diode
1937
B7

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2DS4
Nuvistor Triode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2E22
Pentode
1945
UX5
CV798

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2E24
Beam Tetrode
1946
IO

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2E26
Beam Tetrode
1947
IO
CV3990

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2E30
Beam Tetrode
1949

CV2517

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2E5
Tuning Indicator
1937

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2G
Barretter

CV1842

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2G22P
Thyratron (Hydrogen)

8503

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2G5
Tuning Indicator
1937

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2G57
Thyratron (Mercury Vapour)

5557

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2GK5
Triode
1961

2FQ5A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2H-20
Barretter

IO

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2HF
Double Bi-Grid

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J2
Rectifier EHT
1958

U26

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J30
S Band Magnetron
1944

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J31
S Band Magnetron

CV1807

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J32
S Band Magnetron

CV1808

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J33
S Band Magnetron

CV1809

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J34
S Band Magnetron

CV1810

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J37
S Band Magnetron
1945

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J42
Magnetron (X-Band Pulse)
1957

CV3676

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J42H
Magnetron (X-Band Pulse)

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J55
Magnetron (X-Band Pulse)
1957

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J56
Magnetron (X-Band Pulse)

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J70
Magnetron (S-Band Pulse)
1955

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J70A
Magnetron (S-Band Pulse)

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2J70B
Magnetron (S-Band Pulse)

M5063

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2K25
Klystron (Oscillator)

IO
723A-B CV2792 KS9/20D

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2K28
Klystron (Oscillator)

K3033

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2K33
Klystron

IO

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2K41
Reflex Klystron
1941

417A CV2642 WL-417A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2L2
Rectifier EHT
1959

U25

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2P
Triode
1939
B4
AC042 PA20 S30D

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2P(Gold Line)
Output Triode
1926

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2T/270K
Rectifier EHT

6305 CV261

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2V/400A
Rectifier HW
1952
UX4
3B28 866A AH201 CV32 ESU866 RG3-250A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2V/531E
Rectifier MV

869B

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2V3G
Rectifier EHT
1936
IO

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2V4
Pentode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2VDE
Probably A DE2
1926

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2V.LF
Triode

B4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2X2
Rectifier EHT
1939
UX4
2B21 2X2A 879 CV597 CV3748 VT-119

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2X2A
Rectifier EHT
1949
UX4
2B21 2X2 879 CV597

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

2Y2
Rectifier HW

CV1843

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