Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 57817
Great Britain (UK)
Developer: MO Valve Co. Ltd.; GB 
Tube type:  Triode, vacuum 
  <1925 very rare. ***
Identical to AT40X

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Transmittertube (Radio)
Filament Vf 7 Volts / Direct

Made for the British Army. Other details unknown.

Dimensions (WHD)
incl. pins / tip
52 x 145 x mm / 2.05 x 5.71 x inch
Information source British Radio Valves - The Vintage Years: 1904-1925   Page 126

b4_1~~68.png AT40X: Fin Stewart
Fin Stewart

Just Qvigstad


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]

Data Compliance More Information