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CV1081

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ID = 11065
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Transmitting Tube, Pentode, air cooled   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to CV1081 = 10E/3 = VT137_GPO = VT81 = 4052A
Similar Tubes
Different maximum ratings:
  RK20A

Base UY-Base, 5 Pins (USA, April 1927) (Codex=Hr) Top contact with a cap.
Was used by Transmittertube (Radio)
Filament Vf 7.5 Volts / If 3 Ampere / Direct / Specified voltage AND current AC/DC
Description

60W max plate dissipation, 60MHz max operating frequency. G3 to a separate pin for suppressor grid modulation.
Similar to RK20A with increased power capability.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
-- Original-techn. papers.   
Universal Vade-Mecum, Electron Valves and Semiconductor Devices

rk20_4.png CV1081: Manufacturer's Literature
Emilio Ciardiello


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