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L12

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ID = 14406
       
Country:
Great Britain (UK)
Brand: Osram-Valves GB (not MO-Valves)
Developer: Marconi-Osram - (Valves/Tubes); GB 
Tube type:  Triode, vacuum   Audio Frequency 
Identical to L12
First Source (s)
1938 : - - Manufacturers Literature

Base SPECIAL TUBEBASE in general (Codex=sp)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.06 Ampere / Direct
Description

Miniature tube first made in 1938. For use in hearing aids and small portable radios.

Low Impedance triode. Gm=0.8mA/V Amp Factor=4.8.

 
Dimensions (WHD)
incl. pins / tip
x 33 x 18 mm / x 1.30 x 0.71 inch
Information source The Saga of Marconi Osram Valve   p. 249 & 250, 338
History of the British Radio Valve to 1940   p. 140 & 205
- - Manufacturers Literature
Taschenbuch zum Röhren-Codex 1948/49

l12.png L12: Röhrentaschenbuch VT 1962
Jörg Kulbe

l12_data.png
L12: MARCONI RECEIVING VALVES, LONDON, 1938
Jose Casas-Avalos

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