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S425

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ID = 14793
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Triode, vacuum 
Identical to S425
Similar Tubes
Normally replaceable-slightly different:
  E438

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=F)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere
Information source Röhren-Vademecum; P.H. Brans; Antwerpen   p. 76
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 99, p. 133
Taschenbuch zum Röhren-Codex 1948/49
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren


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