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ID = 17714
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Transmitting Triode, air cooled 
  <1925 very rare. ***
Identical to DET1SW = CV2895
First Source (s)
Oct.1928 : - - Manufacturers Literature Date of Marconi Publication No. 520A.

Base L4 British large 4 pin (1922, LG4) Top contact with a cap.
Was used by Transmittertube (Radio)
Filament Vf 6 Volts / If 2 Ampere / Direct / Specified voltage AC/DC

Short wave transmitting tube for wavelengths down to 10 metres, with 40 watts dissipation. 80mA max plate current; 600V anode voltage at 10 metres, 800V at 15 metres, 1000V at 80 metres. Screw terminal on top of tube also used on the AT50 transmitting tube.

Dimensions (WHD)
incl. pins / tip
75 x 245 x mm / 2.95 x 9.65 x inch
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   Marconi catalog No. 520, Sept. 1928
The Saga of Marconi Osram Valve
DET1SW: Manufacturer's Literature
Emilio Ciardiello


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