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425XP

Information - Help 
ID = 15380
       
Country:
Great Britain (UK)
Brand: Cossor, A.C.; London
Developer: Cossor, A.C.; London 
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to 425XP = VT75_GPO
Similar Tubes
Normally replaceable-slightly different:
  3A/107B ; 420SP ; C405 ; RE304
First Source (s)
1930 : History of the British Radio Valve to 1940 p.164

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.25 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
b4_base_pins~~189.png
425XP: Fin Stewart
Fin Stewart

 

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