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Radio Valve Data: 1915-1960

Keith R Thrower OBE, The Valve Museum, April, 2022.
    
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Help information: Abbreviations - Explanations - Notes.

 

Triode Receiver Valves (pre-1926)*

Type or
Trademark
Filament
Anode
Grid
ra
gm
μ
Year
Base
Notes
and applications
(1)The letters indicate the three types of filaments found on these valves. B = bright emitter, D = dull emitter, O = oxide-coated.
Volts
Amps
Volts
-Volts
mA/V
 
(2)The year shown is when it is believed the type was first issued. This date is accurate for most types but cannot be guaranteed for them all.
(3)Pin-out details for non-exhibits can be found with the base details.
  This table lists valves that were manufactured in the UK or which were claimed to be of UK manufacture. In practice several of the smaller companies imported their valves from abroad.

Navy

Audion (BTH)
B
3.5-3.7
1-1.1
25-50
0.60
3-15
1916
Can
Double/single filament
N.R.2
B
3.3
1.1
30
3.3
1917
Can
As R.2
N.R.2A
B
3.5
1.20
25-40
1918
Can
As R.2A
N.R.3
B
5.0
0.45
50-150
150.0
0.30
45.0
1917
4C
Marconi type Q
N.R.4
B
3.5
1.0
45-55
50.0
0.24
12.0
1917
Can
As R.4
N.R.4A
B
3.5
0.65
45-55
1918
Can
As R.4A
N.R.4B
B
3.8
0.65
50-80
75.0
0.19
14.0
1918
Can
As R.4B
N.R.4C
B
3.8
0.65
45-55
1919
Can
As R.4C
N.R.5
B
3.9
0.67
50-80
20.0
0.45
9.0
1918
I/S1
As R.5
N.R.7
B
3.0-3.7
0.48
30-100
0.28
1920Ω
I/S1
As R.7
N.R.7A
B
3.2
0.65
50
I/S1
General purpose
N.R.7X
B
0.57
50
I/S1
N.R.8 (Horned)
B
4.0
0.70
40-160
30.0
0.30
10.0
1916
B4+2tc
As R.8
N.R.9
B
5.0
0.75
20-60
20.0
0.30
6.0
1919
4C
Marconi V.24
N.R.10
D
N.R.10X
D
1.4
0.25
I/S2a
N.R.12
B
B4
As type R
N.R.12A
B
4.0
0.7
80
0.28
B4
As type R
N.R.13
B
3.5
0.61
50
I/S2
General purpose
N.R.13A
B
3.2
0.65
50
0.28
I/S2
General purpose
R.1
O
2.8
2.0
25-80
30.0
0.80
24.0
1916
ES
Round type N

The earlier naval valves, which usually also had an anchor symbol printed on the glass bulb, omitted the 'N' from the type.

The tables below provide brief details of UK Government valves issued before the introduction of the CV Register in 1941. The nearest commercial equivalent is provided for most of them, although, the commercial types were often modified, including change of base. Most of the valves were later given CV numbers and these have also been included in the tables.

UK Government Valves

Type
Commercial Equivalents
Filament
Description & Comments
Base
 
 
Volts
Amps
 
Type
Ref

 Navy

 Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
ND3
1.0*
0-13
Diode
B4
-
NGT1 = CV1141
GDT4C (Cossor)
4.0
1.75
Argon-filled thyratron
B5+tc
9
NGT2 = CV1128
4.0
1.3
Thyratron
B5
1
NGT3 = CV1142
MR75 (Edi)
2.0*
10.0
Thyratron
4-pin
-
NGT4 = CV1143
GT1A (MOV)
4.0
1.30
Argon-filled thyratron
B5
1
NGT5 = CV1144
BT19 (BTH)
2.5*
5.0
Mercury vapour thyratron
B4+tc
35
NGT6 = CV1145
BT9 (BTH)
5.0
20.0
Mercury vapour thyratron. Double-ended
-
-
NGT6A = CV1146
5.0*
20.0
Thyratron
None
-
NGT7 = CV1147
BT5 (BTH)
5.0
5.0
Mercury vapour thyratron
USM4b+tc
25
NGT8 = CV1148
E1289 (MOV)
2.5*
43.0
Mercury vapour thyratron
Special
-
NGT9 = CV1149
5.0
35.0
Thyratron
None
-
NR14 = CV1150
4.0*
0.10
Low-μ triode
Clips
-
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NR15 = CV1151
PM3 (Mul)
3.6*
0.12
Triode
B4
1
NR15A = CV1152
L410 (MOV), PM4DX (Mul)
3.8*
0.10
Triode
B4
1
NR16 = CV1153
PM254 (Mul)
3.6*
0.30
Output triode
B4
1
NR16A = CV1154
P425 (MOV), P425 (Edi), PM254 (Mul)
3.6*
0.25
Output triode
B4
1
NR17 = CV1155
4.0*
0.10
Low-μ triode
B4
1
NR18 = CV1156
DEQ (MOV)
3.0*
0.22
Triode
Clips
-
NR19 = CV1157
Obsolete type. No data available
Tetrode
-
-
NR22 = CV1158
PM14 (Mul)
3.6*
0.10
RF tetrode
B4+tt
2
NR23 = CV1159
S410 (MOV), PM14 (Mul)
3.6*
0.10
RF tetrode
B4+tt
2
NR26 = CV1038
MHL4 (MOV), 164V (Mul)
4.0
1.00
AF triode
B5
1
NR27 = CV1160
ML4 (MOV), 104V (Mul)
4.0
1.00
Output triode
B5
1
NR27A = CV1161
ML4 (MOV), 104V (Mul)
4.0
1.00
NR27 (Special tests)
B5
1
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NR28 = CV1019
P215 (MOV), PM2 (Mul)
2.0*
0.15
Output triode
B4
1
NR31 = CV399
AC/HL (Maz), MH4 (MOV), 354V (Mul)
4.0
1.00
AF triode
B5
1
NR35 = CV1163
PD220A (Maz)
2.0*
0.20
Class B double triode
B7
10
NR37 = CV1164
AC/SG (Maz), MS4 (MOV)
4.0
1.00
RF tetrode
B5+tt
2
NR38 = CV1165
VMS4 (MOV), VM4V (Mul)
4.0
1.00
VM RF tetrode
B5+tt
2
NR39 = CV1118
PT2 & KT2 (MOV), Pen220 (Maz)
2.0*
0.20
Output pentode or beam tetrode
B5
6
NR40 = (CV1237)
PM24D (Mul)
4.0*
2.00
Output pentode
B5
6
NR41 = CV1083
210VPT (Cos), VP21 (MOV), VP210 (Maz)
2.0*
0.10
VM RF pentode
B7+tc
4
NR42 = CV1166
220PA (Cos), LP2 (MOV), PM2A (Mul)
2.0*
0.20
Output triode
B4
1
NR43 = CV1167
PM24A (Mul)
4.0*
0.25
Output pentode
B5
6
NR44 = CV1168
4XP (Cos), PX4 (MOV), AC044 (Mul), PP3/250 (Maz)
4.0*
1.00
Output triode
B4
1
NR45 = CV1169
VMP4G (MOV)
4.0
1.00
VM RF pentode
B7+tc
5
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NR46 = CV1170
D41(MOV)
4.0*
0.30
Double diode
B5
3
NR47 = CV1040
PP5/400 (Maz), PX25 (MOV), DO24 (Mul)
4.0*
2.00
Output triode
B4
1
NR48 = CV1055
EBC33 (Mul)
6.3
0.20
Double diode triode
IO+tc
29
NR49 = CV1056
EF36 (Mul)
6.3
0.20
RF pentode
IO+tc
8
NR50 = CV1171
A40 (Maz), HA1 (MOV), AT4 (Mul)
4.0
0.25
Acorn triode
5AA
1
NR51 = CV1172
VMP4G (MOV), VPVA (Mul)
4.0
1.20
VM RF pentode
B7+tc
5
NR52 = CV1173
AC/HL (Maz), MH4 (MOV), 354V (Mul)
4.0
0.65
Medium-μ triode
B5
1
NR53 = CV1174
AC/Pen (Maz), KT42 (MOV), Pen4VA (Mul)
4.0
1.00
Output pentode
B7
24
NR54 = CV1175
ZA1(MOV), AP4 (Mul)
4.0
0.25
Acorn pentode
7AA
1
NR54A = CV1176
ZA1 (MOV), AP4 (Mul)
4.0
0.25
As NR54 (less stringent)
7AA
1
NR55 = CV1109
HL13C (Mul), 4D1 (Bri)
13.0
0.20
Medium-μ triode
B7
23
NR56 = CV1178
V503 (Maz), DA30 (MOV), DO30 (Mul)
4.0*
2.00
Output triode
B4
1
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NR57 = CV1179
AC/P (Maz), ML4 (MOV), TT4 (Mul)
4.0
1.00
Low-μ triode
B5
1
NR58 = CV1180
V312 (Maz)
4.0
0.65
Medium-μ triode
B5+tc
13
NR59 = CV1181
AC2/Pen (Maz), KT41 (MOV), PenA4 (Mul)
4.0
2.00
Output pentode or tetrode
B7
24
NR60 = CV1182
H42 (MOV)
4.0
0.60
High-μ triode
B7+tc
23
NR61 = CV1183
W42 (MOV)
4.0
0.60
VM RF pentode
B7+tc
6
NR62 = CV1184
A373 (MOV)
1.8*
1.60
Voltmeter diode (Small Edison Screw cap)
SES+tt
-
NR64 = CV1100
KTW62 (MOV)
6.3
0.30
VM RF tetrode
IO+tc
8
NR65 = CV1282
AC/S2Pen (Maz), MSP4 (MOV)
4.0
1.00
RF pentode
B7+tc
5
NR66 = CV1187
D41 (MOV)
4.0
0.30
Double diode
B5
3
NR67 = CV1280
6L7G, X64 (MOV)
6.3
0.30
VM heptode mixer
IO+tc
2
NR68 = CV587
6Q7G, DH63 (MOV)
6.3
0.30
Double diode triode
IO+tc
29
NR69 = CV1103
Y63 (MOV)
6.3
0.30
Tuning indicator
IO
46
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NR70 = CV1124
MS/Pen (Cos), SP4 (Mul)
4.0
1.00
RF pentode
B7+tc
5
NR71 = CV1129
MS/PenT (Cos)
4.0
1.00
As NR70 (special high voltage tests)
B7+tc
5
NR72 = CV1188
N43 (MOV)
4.0
2.00
Output pentode
B7+tc
15
NR73 = CV1285
6N7G, ECC31 (Mul)
6.3
1.00
Double triode
IO
22
NR74 = CV1189
AC6/Pen (Maz)
4.0
1.75
Beam power amplifier
B7+tc
35
NR75 = CV1190
AC/P4 (Maz)
4.0
1.10
Matched pair of NR94
B5+tc
9
NR76 = CV1191
KTZ41(MOV)
4.0
1.50
RF tetrode
B7+tc
30
NR77 = CV1286
6L6G, EL35 (Mul)
6.3
1.35
Output pentode
IO
36
NR78 = CV581
6C5G
6.3
0.30
Medium-μ triode
IO
20
NR78A = (CV1932)
6J5G
6.3
0.30
Detector or AF amplifier triode
IO
20
NR79 = CV1192
Z62 (MOV)
6.3
0.45
RF pentode
IO+tc
8
NR80
E1148 = CV6
Superseded by VR135
-
-
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NR81 = CV1941
6K7G
6.3
0.30
VM RF pentode
IO+tc
8
NR82 = CV1193
X65 (MOV)
6.3
0.30
Triode hexode FC
IO+tc
3
NR83 = CV1074
6J7G, KTZ63 (MOV)
6.3
0.30
RF tetrode or pentode
IO+tc
8
NR84 = CV1194
41STH (Cos), AC/TH1 (Maz), X41 (MOV), TH4 (Mul)
4.0
1.20
Triode hexode FC
B7+tc
3
NR85 = CV1186
6F6G, KT63 (MOV)
6.3
0.70
Output pentode or beam tetrode
IO
36
NR86 = CV1195
KTW63 (MOV)
6.3
0.30
VM RF tetrode
IO+tc
9
NR87 = CV1196
AC5/PenDD (Maz)
4.0
2.00
Double diode output pentode
B7+tc
9
NR88 = CV1197
RL18 (Mul)
6.3
0.25
VHF triode
B3G
2
NR94 = CV1198
AC/P4 (Maz)
4.0
1.10
Triode
B5+tc
9
NR95 = CV1287
KT32 (MOV)
26.0
0.30
Output beam tetrode
IO
36
NS1 = CV1069
STV280/80 (MOV)
Voltage stabiliser. 73V, 193V, 205V & 282V
B5
15
NS2 = CV1199
Voltage stabiliser. 97.5V nominal
B4
12
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NS3 = CV1200
202 (MOV)
Current stabiliser. 0.2A, 120-200V
B4
6
NS4 = CV1201
4317
Current stabiliser, 20mA, 100-115V
B4
12
NS5 = CV1202
304 (MOV)
Current stabiliser. 0.3A, 95-165V
ES
-
NT17 = CV1205
E1007 (MOV)
4.0*
2.50
Power triode
B4
1
NT18 = CV1206
DA60 (MWT), DO60 (Mul)
6.0*
4.00
Power triode (60W dissipation)
L4
1
NT19 = CV1207
17.0*
5.65
TX triode (450W dissipation). Double-ended
None
-
NT20 = CV1208
P625 (MOV), PM256 (Mul)
6.0*
0.25
Output triode
B4
1
NT22B = CV1209
27.0*
48.0
Silica TX triode (15kW dissipation)
None
-
NT22C = CV1210
27.0*
48.0
Silica TX triode (15kW dissipation)
None
-
NT23B = CV1211
12.5*
18.7
Silica TX triode (2.5kW dissipation)
None
-
NT23D = CV1212
12.5*
18.7
Silica TX triode (2.5kW dissipation)
None
-
NT24 = CV1213
16.5
28.00
Silica TX triode (4.0kW dissipation)
None
-
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NT26
12.5
28.0
Silica TX triode (4.0kW dissipation)
None
-
NT27
14.0
6.5
Silica TX triode 1.5kW dissipation)
None
-
NT30 = CV1214
27.0*
48.0
Silica TX triode (15kW dissipation)
None
-
NT31 = CV1215
16.5*
28.3
Silica TX triode (4kW dissipation)
None
-
NT32A
23.0*
47.0
Silica TX triode (4.5kW dissipation)
None
-
NT32B = CV1216
23.0*
47.0
Silica TX triode (4.5kW dissipation)
None
-
NT33 = CV1217
= CV1215
None
-
NT35 = CV1218
29.0*
52.0
Silica TX triode (15kW dissipation)
None
-
NT36 = CV1219
DA100 (MWT), MZ1-100 (Mul)
6.0*
2.70
Power triode (100W dissipation), later reduced to 1A
L4
1
NT37 = CV1220
4033A (STC)
6.0
1.50
Power triode (25W dissipation)
B5
1
NT38 = CV1293
10.0*
2.0
TX pentode (75W dissipation)
T4+tc
2
NT38A = CV1221
PZ1-75 (Mul), SW75/Pen (Mazda), PT6 (MWT)
10.0*
2.00
TX pentode (75W Dissipation)
T4+tc
2
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NT39 = CV1222
ACT6 (MWT)
10.0*
1.65
TX triode (75W Dissipation)
T4+tc
1
NT40 = CV1223
DET5 (MWT)
4.0*
2.00
Power triode (25W dissipation)
B4
1
NT41A = CV1224
9.1*
20.3
Silica TX triode (1kW dissipation)
None
-
NT43 = CV1225
20.0*
19.5
Silica TX triode (3.5kW dissipation)
None
-
NT45 = CV1295
10.0*
29.0
Silica TX triode (1.5kW dissipation)
None
-
NT45A = CV1226
9.5*
20.4
Silica TX triode (1.25kW dissipation)
None
-
NT46
20.0*
19.5
Silica TX triode (3.5kW dissipation)
None
-
NT46R = CV1227
15.5*
40.0
Silica TX triode (3.5kW dissipation)
None
-
NT48 = CV1228
12.5*
18.7
Silica TX triode (12kW dissipation)
None
-
NT52 = CV1229
3.0*
6.0
Silica split-anode magnetron
None
-
NT54 = CV1230
28.0*
20.0
Silica TX triode (3.5kW dissipation)
None
-
NT55
8.5*
20.3
Silica TX triode (1.75kW dissipation)
None
-
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NT57 = CV1231
15.2*
48.0
Silica TX triode (1kW dissipation)
None
-
NT57A = CV1232
15.8*
48.0
Silica TX triode (1.75kW dissipation)
None
NT57D = CV1233
DET5 (MWT)
4.0*
2.00
TX triode
B4
1
NT57T = CV1234
9.0*
35.0
TX triode
None
-
NT58 = CV1288
DET12 (MWT), TY1-50 (Mul)
7.5*
3.15
RF amplifier or oscillator triode (100MHz max, 50W dissipation)
B4+2tc
16
NT58A = CV1235
TY1-50 (Mul), DET12 (MWT)
7.5*
3.15
RF amplifier or oscillator triode (100MHz max, 50W dissipation)
B4+2tc
16
NT59A = CV1236
8.5*
20.3
TX pentode (1.75kW dissipation)
None
-
NT62 = CV1237
PM24D (Mul)
4.0*
2.00
Output pentode
B5
6
NT62A = CV1238
As Above
4.0*
2.00
Output pentode
B5
6
NT63A = CV1239
13.0*
40.9
TX pentode (2.5kW dissipation)
None
-
NT65 = CV1240
PT15 (modified) (MWT)
4.0*
2.45
TX pentode (modified - 4V heater and base change)
T4+tc
2
NT65A = CV1240
PT15 (MWT)
4.0*
2.45
TX pentode (modified - 4V heater and base change)
T4+tc
2
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NT68 = CV1241
4.0*
1.00
Power triode (20W dissipation)
B4
1
NT68A = CV1242
As NT68 with special cut-off test
4.0*
1.00
As above
B4
1
NT69 = CV1243
= NT63A
None
-
NT74 = CV1370
PV1/35 (Mul), SW35/Pen (Maz)
12.0
0.90
TX pentode
B7+tc
39
NT77A = CV50
10.7*
69.0
Silica TX tetrode (200W dissipation
None
-
NT77B = CV50
10.7*
69.0
Silica TX tetrode (200W dissipation
None
-
NT78A = CV1245
10.0*
65.0
TX triode (300W dissipation
None
-
NT82 = CV1246
P2 (MOV), PM202 (Mul)
2.0*
0.20
Output triode
B4
1
NT83 = CV1247
14.0*
6.00
TX triode (150W dissipation)
None
-
NT84 = CV1248
12.5*
40.8
TX triode (1.5kW dissipation)
None
-
NT86 = CV1249
10.5*
TX triode
None
-
NT87 = CV1250
4279-A (STC)
10.0*
21.0
TX triode (1.2kW dissipation)
2pin+tc side cap
-
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NT90 = CV1251
33.0
20.0
TX triode (6kW dissipation)
None
-
NT92 = CV1252
4212E (STC)
14.0*
6.25
TX triode (275W dissipation).
USL4b
-
NT93 = CV1253
E1161 (MOV)
12.0*
10.6
TX triode
None
-
NT97 = CV1254
E1265
11.0
12.25
TX triode (17.5kW dissipation)
None
-
NT99 = CV1256
E1232 (MWT)
6.0
6.50
Triode with forced air cooling (150W dissipation) Micropup construction
None
-
NT100 = CV1257
E1155 (MWT)
8.0
6.0
Air-cooled modulator tetrode (60W dissipation)
2-pin+tt
-
NU2 = CV1259
= U2
17.0*
6.6
Half-wave rectifier
None
-
NU3 = CV 1064
U12/14 (MOV), DW4/500 (Mul), UU120/350 (Maz)
4.0*
2.5
Full-wave rectifier. Double-ended
B4
5
NU4 = CV1260
Replaces NU1 where approved
14.0*
6.0
Half-wave rectifier. Double-ended
-
-
NU5 = CV1261
RX3-120 (Mul)
13.5*
9.7
Half-wave rectifier. Double-ended
None
-
NU7 = CV1262
GU1 (MOV)
4.0*
3.0
Half-wave mercury-vapour rectifier
B4
4
NU8 = CV1263
RG1-125 (Mul)
2.0*
5.0
Half-wave mercury-vapour rectifier
ESM+tt
-
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NU12 = CV1264
Formally U18 (MOV), FW4-500 (Mul)
4.0*
3.20
Full-wave rectifier
B4
5
NU13 = CV1265
U15 (MOV), RZ1-250 (Mul)
6.0*
2.0
Half-wave rectifier
L4
C
NU13A = CV1266
U15 (MOV), RZ1-250 (Mul)
6.0*
2.0
Half-wave rectifier
L4
C
NU15 = CV1267
1D5 (Brimar), U4020 (Maz)
40.0
0.20
Half-wave rectifier
B5
8
NU16 = CV1072
GU50 (MOV)
4.0*
3.00
Half-wave mercury-vapour rectifier
B4+tc
6
NU17 = CV1039
44IU (Cos), UU5 (Maz), MU12/14 (MOV), IW4 (Mul)
4.0
2.50
Full-wave rectifier
B4
14
NU17S = CV1296
MU14 (MOV)
4.o
2.50
Full-wave rectifier
B4
5
NU18 = CV1113
U17 (MOV)
4.0*
1.00
EHT half-wave rectifier
B4+tc
6
NU20 = CV1268
U50 (MOV)
5.0*
2.00
Full-wave rectifier
IO
60
NU21
17.0*
16.8
Silica half-wave rectifier
None
-
NU22
19.0*
19.0
Silica half-wave rectifier
None
-
NU22B = CV1269
MU2
19.0*
19.0
Silica half-wave rectifier
None
-
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NU22C = CV1270
19.0*
19.0
Silica half-wave rectifier
None
-
NU23 = CV1271
27.5*
47.0
Silica half-wave rectifier
None
-
NU24 = CV1272
22.0*
52.0
Silica half-wave rectifier
None
-
NU25 = CV1273
19.0*
19.5
Silica half-wave rectifier
None
-
NU26 = CV1274
22.0*
18.0
Silica half-wave rectifier
None
-
NU26C = CV1275
22.0*
18.0
Silica half-wave rectifier
None
-
NU28 = CV1276
28.0*
20.0
Silica half-wave rectifier
None
-
NU29 = CV1277
29.0*
52.0
Silica half-wave rectifier
None
-
NU30 = CV1278
14.0*
10.0
Silica half-wave rectifier
None
-
NU31 = CV1279
MU2 (Maz)
2.0*
3.10
Mercury-vapour half-wave rectifier
B4+tc
6
NU33 = CV1290
SU2150A (Cos)
2.0
1.50
EHT half-wave rectifier
B4+tc
17
NU33A = CV1291
HVR2A (Mul)
2.0
1.50
EHT half-wave rectifier
B4+tc
17
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
NU34 = CV1134
HVR2 (Mul)
4.0
0.65
EHT half-wave rectifier
B4+tc
17

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rvd-017