radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

MH40

Information - Help 
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
Similar Tubes
Normally replaceable-slightly different:
  E721
Heater different:
  E726

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

 

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  
rmXorg