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Valve Types and Equivalents
    
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Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NC1
Cathode-Ray Tube
1936
 
401A CV320 CV950 E4103/B/4
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NC2
Cathode-Ray Tube
 
 
CV951
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NC4
Cathode-Ray Tube
 
 
CV953
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NC5
Cathode-Ray Tube
 
 
3220K CV954
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NC6
Cathode-Ray Tube
 
 
4409 CV955
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NC7
Cathode-Ray Tube
 
 
4602 CV956
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NC8
Cathode-Ray Tube
 
 
32E CV957
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NC10
Cathode-Ray Tube
 
3220K ACR2X CV959
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NC13
Cathode-Ray Tube
 
 
CV961 V1047
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NC14
Cathode-Ray Tube
 
 
CV962
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NC16
Cathode-Ray Tube
 
B12B
CV964
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NC19
Cathode-Ray Tube
 
 
CV967
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NGT1
Thyratron
 
B5
4803 CV1141 DPQ GDT4C
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NGT2
Thyratron
1937
B5
CV1128 GT1C VGT128
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NGT3
Thyratron
 
 
CV1142 MR75
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NGT4
Thyratron
 
 
CV1143 GT1A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NGT5
Thyratron
 
B4
BT19 CV1144 XG2-500
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NGT7
Thyratron
 
UX4
21N13 CV1147
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NGT5
Thyratron
 
B4
BT19 CV1144 XG2-500
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NGT8
Thyratron
 
 
CV1148 CV12 E1289
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NGT121
Thyratron
1938
 
T41
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NGT128
Thyratron
1937
 
GT1C
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR4C
Triode
 
B4
R.4C
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR8
Triode
1922
B4
R.8
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR9
Triode
1919
 
S3 V24
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR14
Triode
 
I/S1
7406 CV1150
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR15
Triode
 
 
CV1151 PM3 PM4DX
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR15A
Triode
1924
B4
410LF CV1152 L410 PM4DX
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR16
Triode
 
 
CV1153 PM254
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR16A
Triode
 
 
CV1154 PM254 PM4DX
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR17
Triode
1926
CV1155
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR18
Triode
 
 
CV1156 DEQ
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR22
Pentode
 
 
CV1158 PM14
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR23
Pentode
 
 
CV1159 PM14 S410
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR26
Triode
 
 
41MLF CV1038 MHL4 POVT91+D5963 VR38
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR27
Triode
 
 
104V CV1160
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR27A
Triode
 
B5
104V CV1161
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR28
Triode
 
 
CV1019 PM2 VR19
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR31
Triode
 
 
AR17 CV1037 MH4 VR37
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR35
Double Triode
 
 
CV1163 PD220A PM2BA
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR37
Pentode
 
 
MS/Pen MS4
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR38
Pentode
 
B5
CV1165 VMS4
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR39
Pentode
1932
 
ARP1 CV1118 KT2 PM22A POVT136 VR118
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR40
Pentode
 
 
PM24D
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR41
Pentode
 
 
210VPT ARP13 CV1083 VP21 VR83
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR42
Triode
 
 
ARS CV1166 CV1304 LP2 P220 VR22
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR43
Pentode
 
B5
CV1167 PM24A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR44
Triode
 
B4
CV1168 POVT131+D5942 PX4
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR45
Pentode
 
B7
CV1169 POVT119 VMP4G
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR46
Double Diode
 
B5
CV1170 D41
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR47
Triode
 
B4
CV1040 DO24 PX25 VR40
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR48
Double Diode Triode
1938
IO
AR21 CV1055 EBC33 OM4 VR55
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR49
Pentode
 
IO
CV1056 EF36 OM5 POVT201 VR56
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR50
Acorn Triode
 
AT4 CV1171 HA1
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR51
Pentode
 
B7
CV1172 VMP4G VP4A
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR52
Triode
1929
B5
354V CV1173
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR53
Beam Tetrode
 
 
AC/Pen CV1174 KT42 MP/Pen Pen4VA
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR54
Pentode
 
 
AP4 CV1175 ZA1
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR54A
Pentode
 
 
AP4 CV1176
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR55
Triode
 
 
4D1 AR7 CV1000 CV1109 HL1320 VR109
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR56
Triode
 
 
CV1178 DA30 DO30
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR57
Triode
1929
B5
AC/P CV1179 ML4 TT4
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR58
Triode
 
 
CV1180 V312
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR59
Pentode
 
 
4066A 7A3 ARP25 CV1181 KT41 PenA4
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR60
Triode
 
B7
CV1182 H42
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR62
Diode
 
 
A373 CV1184
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR61
Pentode
 
B7
CV1183 W42
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR64
Pentode
 
IO
CV1100 CV1281 KTW61 KTW62 POVT193 VR100 W281
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR65
Pentode
1933
 
AC/S2Pen CV1282 MSP4
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR66
Double Diode
 
 
CV1187 D41
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR67
Heptode
 
IO
6L7 ARH1 CV1280 X64
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR68
Double Diode Triode
1936
IO
6Q7G CV587+D5855 POVT194
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR69
Tuning Indicator
 
 
CV1103 VI103 Y63
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR70
Pentode
 
B7
ARP23 CV1124 MS/Pen VR124
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR71
Pentode
 
 
CV1129 MS/PenT VR129
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR72
Pentode
 
 
CV1188 N43
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR73
Double Triode
1937
IO
6N7G CV1285 ECC31
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR74
Pentode
1938
B7
AC6/Pen CV1189 PV1-35
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR75
Triode
1939
B5
AC/P4 CV1190 W1302
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR76
Pentode
1938
 
CV1191 KTZ41
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR77
Pentode
 
IO
6L6G CV1286 EL35
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR78
Triode
 
 
6C5G CV581
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR78A
Triode
 
 
L63
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR79
Pentode
 
 
ARP20 ARP21 CV1192 CV1336 SP42 Z62
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR80
Triode
 
 
CV1135 DET20 E1148 VR135
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR81
Pentode
1936
IO
6K7G CV1941 KTW63
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR82
Triode Hexode
 
IO
CV1193 VR99 W1532 X65
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR83
Pentode
 
IO
6J7G ARP16 CV1074 KTZ63 VT74
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR84
Triode
 
 
20A1 CV1194 X41
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR85
Pentode
 
IO
6F6G ARP17 CV1186 KT63
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR86
Pentode
 
IO
ARP15 CV1195 KTW63
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR87
Double Diode Pentode
1938
B7
AC5PenDD CV1196
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR88
Triode
1941
B3G
CV1197 EC53
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR89
Klystron
1941
IO
CV35
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR94
Triode
 
B5
AC/P4 AD/P4 CV1198 W2529
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NR95
Beam Tetrode
1935
 
CV1287 CV1502 KT32 VR502
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NS1
Voltage Stabiliser
 
B5
5458+D1699 CV1069 STV280/80 VS69
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NS2
Voltage Stabiliser
1940
B4
5459 CV1199
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NS3
Barretter
 
 
202 CV1200
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NS4
 
 
 
4713
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NS5
Barretter
 
 
304 CV1202
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NSP1
Strobotron
 
UX4
CV220
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT.1
Magnetron
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT1
Triode
 
 
CV1203
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT17
Triode
 
 
2587T CV1205
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT18
Triode
 
 
DO60
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT19
Triode
1933
CV1207
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT20
Triode
1933
B4
CV1208 P625 PM256 PM365
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT32B
Triode
 
CV1216
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT36
Triode
1933
L4
BS100 CV1219 DA100 MZ1-100
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT37
Triode
 
 
4033A CV1220
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT38
Pentode
 
 
ATP75 CV1371 PT6 PZ1/75
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT38A
Pentode
 
 
ARP75 CV1221 PT6 PZ1-75 SW75Pen
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT39
Triode
 
 
ACT36 AT75 CV1222
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT40
Triode
 
B4
CV1223 CV384 DET5
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT46
Triode
 
 
CV1227
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT57
Triode
 
 
 
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT58
Triode
 
B4
4304CB 834 CV1062 CV1288 DET12 POVT121A TY1-50 VT62
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT58A
Triode
 
 
CV1235
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT62
Pentode
 
 
CV1237 PM24D
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT62A
Pentode
 
 
CV1238 PM24D
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT65A
Pentode
 
 
CV1240 PZ1-35
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT68
Triode
 
 
CV1241
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT68A
Triode
 
 
CV1242
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT74
Pentode
 
 
ATP35 CV1370
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT82
Triode
 
 
CV1246 P2 PM202
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT83
Triode
 
 
CV1247
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT87
Triode
 
 
CV1250
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT92
Triode
 
4212E CV1252
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT93
Triode
 
 
CV1253
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT97
Triode
 
CV1254
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT98
Magnetron
 
 
E1189
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT98A
Magnetron
 
 
CV1491 E1189
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT99
Micropup Triode
 
CV92 CV1256 E1232 W2514
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NT100
Pentode
 
 
CV1257 E1155
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU1
Rectifier HW
 
CV1258
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU2
Rectifier HW
 
 
CV1259 ESU450
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU3
Rectifier FW
1931
B4
AU4 CV1064 DW4-500 U12/14 U14 VU64
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU4
Rectifier HW
 
 
CV1260 ESU208
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU5
Rectifier HW
 
CV1261 RX3-120
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU7
Rectifier MV
1930
B4
CV1262 GU1
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU8
Rectifier MV
 
3828 CV1263
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU12
Rectifier FW
 
B4
45IU AU1 CV1264 FW4-500 U18/20
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU13
Rectifier HW
 
L4
CV1265 RZ1-250 U15
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU13A
Rectifier HW
1934
L4
4476A AU12 CV1266 RZ1-250 U15
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU15
Rectifier HW
 
B5
CV1267 U4020
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU16
Rectifier HW
 
 
AU6 CV1072 GU5 RG1-240A VU72
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU17
Rectifier FW
 
 
AU4A CV1039 IW4 MU14 R3 UU5 VU39
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU18
Rectifier HW
 
B4
AU4 CV1113 U17 VU113
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU20
Rectifier HW
 
IO
CV1268 U50
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU26
Rectifier HW
 
7448 CV1274
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU29
Rectifier HW
 
3776 CV1277
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU30
Rectifier HW
 
 
5476 CV1278
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU31
Rectifier HW
 
 
CV1279 MU2
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU33
Rectifier HW
 
B4
CV1120 CV1290 SU2150A VU120
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU33A
Rectifier HW
 
 
HVR2
Type
Structure
Date
Base
PDF
Sensibly equivalent to:
NU34
Rectifier HW
 
B4
CV1134 HVR2 VU134
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