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CV1688

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ID = 65367
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Developer: Standard Telephones and Cables Ltd. (STC); London, Foots Cray 
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 very rare. ***
Identical to CV1688 = 3B/252B = 4033L = VT120_GPO
Similar Tubes
Normally replaceable-slightly different:
  4033X ; 61P

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Was used by Military and/or Government
Filament Vf 6 Volts / If 1.4 Ampere / Indirect / Specified voltage AND current AC/DC
Information source Babani, International Radio Tube Encyclopaedia   Pages 78 & 79
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Page 36

b5~~7.png CV1688: Fin Stewart
Fin Stewart


Just Qvigstad
cv1688_1.png
CV1688: British ministry of supply valve electronic datasheet catalogue
Stefan Müller

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