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MH40

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ID = 25939
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Developer: Marconi-Osram - (Valves/Tubes); GB 
Tube type:  Triode, vacuum   Audio Frequency 
Identical to MH40

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1.75 Ampere / Indirect / Specified voltage AC/DC
Description

This tube is a special low noise type.

 
Information source History of the British Radio Valve to 1940   p. 147 & 205
History of GEC and the Marconi Osram Valve

b5~~69.png MH40: Fin Stewart
Fin Stewart


Just Qvigstad
mh40_data.png
MH40: MARCONI RECEIVING VALVES, LONDON, 1938
Jose Casas-Avalos

 

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