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CV1639

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ID = 30903
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Triode, vacuum   Audio Frequency 
Identical to CV1639 = 4101E = 3A/141A = VT31B_GPO
Similar Tubes
Other class quality (otherwise equal):
  3A/141AY

Filament Vf 4.5 Volts / If 1 Ampere / Direct
Description BC4 Telephony base. 
Information source -- Original-techn. papers.   
Babani, International Radio Tube Encyclopaedia   
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uv~~39.png CV1639: Fin Stewart
Fin Stewart

 

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