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There are fourteen valve types shown on the SSEM drawings. |
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CV, or 'Common Valves' are only 'sensibly equivalent',
therefore check carefully if changing manufacturer. |
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Valve number equivalencies from British Museum database
http://www.r-type.org/static/eqivinx.htm. |
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Note that this database uses 4-digit CV numbers, therefore
CV73 also appears as CV0073. |
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Another source is
http://www.g4nsj.co.uk/valves/ServiceValveEqu_RSGB_1947.pdf (3.4 MB). |
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Used Name |
CV1092 |
EA50 |
VR92 |
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Quantity Used |
306 |
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Other Names |
CV0375 |
2B35 |
6D1 |
D61 |
SD61 |
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Valve Type |
Diode (Va = 50 or 125V, Ia = 5.0mA). |
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Unless otherwise shown, all diodes are type CV1092 (EA50, VR92). |
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Used Name |
CV1091 |
EF50 |
VR91 |
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Quantity Used |
156 |
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Other Names |
63SPT |
ARP35 |
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Valve Type |
Pentode, 3.0W (Va = 250V, Ia = 10mA). |
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Unless otherwise shown, all pentodes are type CV1091 (EF50, VR91). |
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Used Name |
CV173 |
EF55 |
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Quantity Used |
68 |
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Other Names |
CV0173 |
CV0296 |
DDR2 |
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Valve Type |
Pentode, 10W (Va = 250V, Ia = 40mA). |
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Used Name |
VR116 |
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Quantity Used |
2 |
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Other Names |
CV0343 |
CV1116 |
6F32 |
V872 |
5A/200D |
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Valve Type |
Pentode, Fast, Wide Bandwidth, High Gain (Va = 200V, Ia = 5.1mA). |
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Used Name |
807 |
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Quantity Used |
5 |
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Other Names |
CV0124 |
CV1060 |
CV1364 |
CV1374 |
CV1572 |
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5B/250A |
ATS25 |
ATS25A |
QV05-25 |
VT60 |
VT60A |
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Valve Type |
Output Beam Tetrode, 25W (Va = 300V, Ia = 83mA). |
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Used Name |
6SN7GT |
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Quantity Used |
11 |
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Other Names |
CV0278 |
CV1988 |
CV3627 |
13D2 |
B65 |
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Valve Type |
Double Triode. (Not 6SN7 = CV1986 or 6SN7G = 13D2, B65, ECC32.) |
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Used Name |
VR105/30 |
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Quantity Used |
2 |
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Other Names |
CV0686 |
0C3 |
G105/1D |
GL-105/30 |
KD24 |
QS1206 |
W-269 |
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Valve Type |
Neon Voltage Stabiliser (Va = 105V, Ia = 40mA). |
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Used Name |
CV71 |
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Quantity Used |
1 |
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Other Names |
CV0071 |
ASGL1M |
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Valve Type |
Neon. |
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Used Name |
5U4 |
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Quantity Used |
1 |
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Other Names |
CV0575 |
CV1575 |
53KU |
5T4 |
5U4G |
5U4GB |
U52 |
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Valve Type |
Full-Wave Rectifier (Va = 450V, Ia = 225mA). |
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(Or 5U4G or GB = CV0684, CV0717, 5RGY, 274B, U52, VU17A, WE274B) |
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Used Name |
VU111 |
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Quantity Used |
2 |
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Other Names |
CV1111 |
19G7 |
AU5 |
R11 |
U27 |
V1907 |
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Valve Type |
E.H.T. Half-Wave Rectifier Diode (Va = 2500V, Ia = 30mA). |
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Used Name |
CV73 |
(aka V1120B on drawing) |
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Quantity Used |
1 |
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Other Names |
CV0073 |
11E3 |
KT44 |
Pen46 |
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Valve Type |
Power Beam Tetrode (Va = 250V, Ia = 85mA) (Not CV72 = V1120). |
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Used Name |
VR78 |
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Quantity Used |
4 |
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Other Names |
CV1078 |
ARD2 |
D1 |
T4D |
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Valve Type |
Diode for DC restore to C.R.T. grid (Va = 125V, Ia = 5mA). |
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Used Name |
VCR97 |
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Quantity Used |
3 |
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Other Names |
CV0269 |
CV1097 |
CV1385 |
ECR60 |
E4504/B/16 |
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Valve Type |
6-inch Cathode Ray Tube |
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Used Name |
CV989 |
(should really be CV1131, but not available.) |
Quantity Used |
1 |
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Other Names |
CV0989 |
CV1131 |
41D5 |
Possibly also NC2 |
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Valve Type |
12-inch Cathode Ray Tube (n.b. NC2 not on database of British Navy Types.) |
1 |
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Total Quantity Used |
563 |
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