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4013C

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ID = 33207
       
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:  Transmitter Triode, liquid-cooling   Text 
  Ca. 1925 up to 1945 rare.
Identical to 4013C = 3Q120G
Similar Tubes
Normally replaceable-slightly different:
  4013D ; VT60_GPO

Base SPECIAL TUBEBASE in general
Was used by Transmittertube (Radio)
Filament Vf 14 Volts / If 36 Ampere / Direct / Specified voltage AC/DC
Description

Water-cooled transmitting triode. Pure tungsten filament. Can be operated at 5KV anode voltage up to 22MHz. 5KW anode dissipation with 3 gal/min water flow in the cooling jacket. Operating filament voltage between 13.5 and 14.5 volts, exact value marked on the body.
2 to 8 amps total emission.

 
Information source - - Manufacturers Literature   
Babani, International Radio Tube Encyclopaedia   Pages 184 & 185

 

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