BACK to Archive Index                                                                Brian Russell Valve type and Equivalent  Survey 2011
There are fourteen valve types shown on the SSEM drawings.        
CV, or 'Common Valves' are only 'sensibly equivalent', therefore check carefully if changing manufacturer.
Valve number equivalencies from British Museum database http://www.r-type.org/static/eqivinx.htm.
Note that this database uses 4-digit CV numbers, therefore CV73 also appears as CV0073.  
Another source is http://www.g4nsj.co.uk/valves/ServiceValveEqu_RSGB_1947.pdf (3.4 MB).
Used Name CV1092 EA50 VR92     Quantity Used 306
Other Names CV0375 2B35 6D1 D61 SD61
Valve Type Diode  (Va = 50 or 125V, Ia = 5.0mA).        
  Unless otherwise shown, all diodes are type CV1092 (EA50, VR92).    
Used Name CV1091 EF50 VR91     Quantity Used 156
Other Names 63SPT ARP35
Valve Type Pentode, 3.0W  (Va = 250V, Ia = 10mA).        
  Unless otherwise shown, all pentodes are type CV1091 (EF50, VR91).    
Used Name CV173 EF55       Quantity Used 68
Other Names CV0173 CV0296 DDR2
Valve Type Pentode, 10W  (Va = 250V, Ia = 40mA).        
Used Name VR116         Quantity Used 2
Other Names CV0343 CV1116 6F32 V872 5A/200D
Valve Type Pentode, Fast, Wide Bandwidth, High Gain  (Va = 200V, Ia = 5.1mA).    
Used Name 807         Quantity Used 5
Other Names CV0124 CV1060 CV1364 CV1374 CV1572
  5B/250A ATS25 ATS25A QV05-25 VT60 VT60A
Valve Type Output Beam Tetrode, 25W  (Va = 300V, Ia = 83mA).      
Used Name 6SN7GT         Quantity Used 11
Other Names CV0278 CV1988 CV3627 13D2 B65
Valve Type Double Triode. (Not 6SN7 = CV1986 or 6SN7G = 13D2, B65, ECC32.)    
Used Name VR105/30         Quantity Used 2
Other Names CV0686 0C3 G105/1D GL-105/30 KD24 QS1206 W-269
Valve Type Neon Voltage Stabiliser  (Va = 105V, Ia = 40mA).        
Used Name CV71         Quantity Used 1
Other Names CV0071 ASGL1M
Valve Type Neon.
Used Name 5U4         Quantity Used 1
Other Names CV0575 CV1575 53KU 5T4 5U4G 5U4GB U52
Valve Type Full-Wave Rectifier  (Va = 450V, Ia = 225mA).        
  (Or 5U4G or GB = CV0684, CV0717, 5RGY, 274B, U52, VU17A, WE274B)    
Used Name VU111         Quantity Used 2
Other Names CV1111 19G7 AU5 R11 U27 V1907
Valve Type E.H.T. Half-Wave Rectifier Diode (Va = 2500V, Ia = 30mA).      
Used Name CV73 (aka V1120B on drawing)   Quantity Used 1
Other Names CV0073 11E3 KT44 Pen46
Valve Type Power Beam Tetrode (Va = 250V, Ia = 85mA)  (Not CV72 = V1120).    
Used Name VR78         Quantity Used 4
Other Names CV1078 ARD2 D1 T4D
Valve Type Diode for DC restore to C.R.T. grid  (Va = 125V, Ia = 5mA).      
Used Name VCR97         Quantity Used 3
Other Names CV0269 CV1097 CV1385 ECR60 E4504/B/16
Valve Type 6-inch Cathode Ray Tube          
Used Name CV989 (should really be CV1131, but not available.) Quantity Used 1
Other Names CV0989 CV1131 41D5 Possibly also NC2      
Valve Type 12-inch Cathode Ray Tube (n.b. NC2 not on database of British Navy Types.) 1
            Total Quantity Used 563