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Valve Types and Equivalents
    
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Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20
Output Triode
1937
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20.
Triode
1920
UVThe Shaw Base
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
200-0069
Thyratron (Mercury Vapour)
 
 
BT19
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
2000
 
 
 
18049 68506
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20026
Triode
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
201-A
Triode
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
201A
Triode
1922
UVThe Shaw Base
CT-201A UX201A+D4823
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
202
Barretter
 
 
CV1200 NS3
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
202DDT
Double Diode Triode
1936
B7
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
202STH
Triode Hexode
1937
B7
C36A TH21C TH2321
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
202VP
Pentode
1938
B7
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
202VPB
Pentode
1938
B7
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
203THA
 
1938
B7
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
204A
 
 
 
ES204A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
2050
Thyratron
 
IO
BR-105050 CV2565
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
2050A
Thyratron
1948
IO
EN32 ME1501
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
205D
Triode
1924
UX4
CV1749
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
2051
Thyratron
 
IO
CV1798 VT-109
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
206D(While Line)
Detector Triode
1926
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
206H(Red Line)
RF Triode
1926
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
206L(Green Line)
AF Triode
1926
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
206RC(Blue Line)
RCC Triode
1926
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
207
 
 
 
ESW207
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20A1
Triode Hexode
1938
 
41STH AC/TH1 CV1194 CV1424 NR84 X41
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20A2
Thyratron
1957
IO
2050 4G/281D CV1848 WT-210-0004 WT-246 XB7674
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20A3
Thyratron
1944
 
2D21 4G/280K CV797 E1955 EN91
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20CG
Photocell
1949
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20CV
Photocell
1949
B8B
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20D1
Double Diode
1949
B7G
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20D2
Triode Hexode
1940
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20D3
Diode Heptode
 
 
12AH8
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20D4
Triode Heptode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20F2
Pentode
1949
B8A
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20L1
Triode
 
B8A
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20P1
Pentode
1951
IO
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20P2
Beam Tetrode
1950
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20P3
Beam Tetrode
1952
IO
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20P4
Pentode
1953
IO
CL30
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20P5
Beam Tetrode
1948
B8A
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
20PE20
Camera Tube
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
21
Triode
 
 
CV620
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
2101
Output Pentode
1940
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
2102
Triode
1935
UX6
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
2103
Double Output Pentode
1935
UX7
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
210DDT
Double Diode Triode
1938
B5
CV1044 H20 HD24 HL21/DD K23B TDD2A VR44
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
210DET
Triode
1930
B4
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
210DG
Bi-Grid
1931
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
210HF
Triode
1928
B4
HL2 HLB1 PM1HF
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
210HL
Triode
1931
B4
CV1050 CV2571 HL2K K30C K30D K30K PM2HL VT50
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
210LF
Triode
1929
B4
AR9 CV1021 CV1027 CV1307 K30B L210 L21 L2 PM1LF VR21 VR27
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
210PG
Heptode
1934
B7
CV1043 FC2 K80A VHT2A VR43 X22
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
210PGA
Heptode
1938
B7
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
210RC
Triode
1929
B4
H2 H210
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
210SPT
Pentode
1934
B7
CV1049 SP210 SP2 SPT2 VR49 Z22
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
210VPA
Pentode
1938
B7
CV2574 W21
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
210VPT
Pentode
1934
B7
ARP13 CV171 CV1083 CV1332 K50M NR41 VP21 VP210 VP2 VPT2 VR83
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
211
Triode
 
 
242C 4242A CV25 CV2576 ES85 UE311 UV-211 VT4C
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
211A
Triode
 
 
4242A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
212E
Triode
 
 
4212E
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
2151
Output Pentode
1940
UX6
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
215D(While Line)
Detector Triode
1926
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
215H(Red Line)
RF Triode
1926
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
215L(Green Line)
AF Triode
1926
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
215A
Triode
1919
 
38015 4215A CW-1344 CW-38015 CW1344 R215A VT-5 WE215A Wecovalve
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
215P
Triode
1930
B4
P215
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
215S.G.
Bi-Grid
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
215SG
Pentode
1929
B4
CV1018 CV1048 PM12 S23 S2 SG215 VR18 VW48 Z21
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
216A
Triode
1922
UVThe Shaw Base
R216A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
21A1
Thyratron (Hydrogen)+B370
 
 
4G/320D 6574
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
21A6
Pentode
 
B9A
CV5077 N152 N359 PL81
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
21LU8
Triode Beam Tetrode
1970
B12C
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
21VO6
Pentode
 
 
EL822
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
22
RF Tetrode
1936
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220B
Double Triode (Class B)
1933
B7
AR16 CV1032 VR32
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220DD
Double Diode
1934
B5
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220HPT
Pentode
1932
B5
KT2
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220LF
Triode
1952
 
AR15 CV1313
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220IPT
Pentode
1938
B7
ARP14 CV1333 Z22
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220OT
Pentode
1937
220HPT K70B KT2 PM22A PT2 Pen220 PenB1
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220P
Triode
1929
B4
CV1020 P2 PM2 VT20
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220PA
Triode
1931
B4
CV1022 K30G L2 LP2 LP2 P220 P220 PB1 PM2A VR22
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220PT
Pentode
1932
B4
CV1051 PM22C Pen220A VT51
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220R
Triode
 
 
AR14 CV1312
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220SG
Pentode
1928
B4
SG220
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220TH
Triode Heptode
1938
B7
CV1082 TH2 X24
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220VPT
Pentode
1942
 
ARP24 CV1338
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220VS
Pentode
 
B4
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
220VSG
Pentode
1931
B4
CV1028 S215VM VR28
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
222B
Rectifier HW
 
 
4222B
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
2255
Camera Tube (Videcon)
 
 
8626
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
2255ROE
Camera Tube (Videcon)
 
 
8541A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
2255IND
Camera Tube (Videcon)
 
 
P849
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
225DU
Rectifier FW
1937
B7
CV1454
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
226
Triode
1927
UX4
26 CX-326 UX-226
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
227
Triode
1927
 
27 DE-1 ER227 G-27 MY227 NY227 SY227 UY227
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
227A
Triode
1944
 
3-100E3
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
228A
Triode
 
 
4228A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
22M1
Glow Modulator
1946
 
1B59
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
22V/310A/F
Rectifier FW MV
1939
UX4
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
230HPT
Pentode
1931
B4
PM22
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
230PT
Triode
1929
B4
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
230XP
Triode
1929
B4
CV1023 VT23
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
238B
Ignitron
 
 
BK46/5555
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
239A
Triode
1927
UX4
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
23D
Cathode-Ray Tube
1952
B12B
CV1588 VCR139A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
23Z9
Double Triode Pentode
1967
B12C
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
24
Pentode
 
 
324 CV936
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
240B
Double Triode (Class B)
1933
B7
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
240QP
Double Pentode
1936
B7
QP21 QP22B QP230 QPT2
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
242A
Triode
 
 
4242A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
242C
Triode
 
 
211 4242A CV25 ES85 UE311
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
244V
Triode
1930
B5
TE244
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
245
Output Triode
1929
 
345 45 CV610 UX245
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
249B
Rectifier MV
1936
UX4
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
24A/24E
Pentode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
24B1
Trigatron
 
 
CV6008
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
24B9
Trigatron
1971
CV6008 CV6173
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
24A
RF Tetrode
1938
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
24D
Cathode-Ray Tube
 
 
3AFP31 DH7-91
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
24E
RF Tetrode
1938
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
24G
Triode
1944
UX4
3C24 HK24 VT-204
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
24S
RF Tetrode
1936
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
250TH
Triode
 
 
CV2589
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
251
Barretter
1934
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
252A
Triode
1926
 
WE252A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
253
Triode
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25A6
Pentode
1936
 
CV549
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25A6G
Output Pentode
1936
IO
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25A6GT
Output Pentode
1940
 
CV550
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25A7GT
Output Pentode Rectifier HW
1940
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25B5
Double Trode
1940
UX6
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25B8GT
Triode RF Pentode
1940
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25C6G
Beam Tetrode
1940
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25E6
Pentode
1956
 
25F7 PL36
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25L6
Output Pentode
1937
IO
CV552
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25L6G
Output Pentode
1937
 
CV551 CV1287 KT32
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25L6GT
Output Pentode
1937
IO
CV553 KT32
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25N6G
Double Triode
1940
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25RE
Rectifier FW
1940
IO
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25SN7GT
Double Triode
 
 
CV423
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25T
Triode
1945
 
3C24 CV941 HK24
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25TG
Triode
1945
 
3C24
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25U4GT
Rectifier HW
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25W4GT
Rectifier HW
1950
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25X4G
Rectifier HW
 
IO
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25Y5
Rectifier FW
1941
UX6
CV942
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25Z4G
Rectifier HW
1939
IO
U31
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25Z5
Rectifier FW
1936
UX6
CV555
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25Z6
Rectifier FW
1936
 
CV558
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25Z6G
Rectifier FW
1936
IO
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
25Z6GT
Rectifier FW
1938
IO
CV559
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
26
Triode
1927
UX4
226 CV943 REN326 UX226
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
260A
Pentode
 
 
4260A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
26A7GT
Double Tetrode
 
 
CV3577
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
26AQ8
Double Triode
1954
B9A
UCC85
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
27
Triode
1935
UX5
UY-227
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
270A
Triode
 
 
4270A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
272
Rectifier MV
 
 
5557
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
274A
Rectifier FW
 
 
4274A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
279A
 
 
 
4279A CV669
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
27GB5
Pentode
 
 
PL500 PL504
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
27M1
Photomultipliers
1954
931A CV337
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
27M2
Photomultipliers
 
 
CV5085
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
27S
Triode
1936
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
27SU
Rectifier HW
 
IO
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
281
Rectifier HW
 
 
UX281
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
282A
Pentode
 
 
4282A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
28AK8
Triple Diode Triode
 
 
UABC80
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
28D7
Double Beam Tetrode
1943
B8B
CV945 CV946
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
29C1
Diode
 
IO
CV430
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
29D15
Ionisation Sensor
 
 
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