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PM25

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ID = 11505
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Vacuum Pentode   Power/Output 
Identical to PM25
Similar Tubes
Normally replaceable-slightly different:
  B543

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eoo) Sidecontact.
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 0.1 Ampere / Direct / Specified current DC = (Series working)
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   Mullard 1935
History of the British Radio Valve to 1940
Babani, International Radio Tube Encyclopaedia

sock_pm25.gif PM25: W.H.
Wolfgang Holtmann


Just Qvigstad
Usage in Models 2= 1928? ; 2= 1931

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4

Collection of

 
pm25_a.jpg

 

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