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A4D

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ID = 13655
       
Country:
Spain
Brand: Castilla; Madrid
Tube type:  Triode, vacuum   Universal 
Identical to A4D
Similar Tubes
Normally replaceable-slightly different:
  E415

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 / Indirect / Specified voltage AC/DC
Information source Röhren-Vademecum; P.H. Brans; Antwerpen   p. 10
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 99, p.
Taschenbuch zum Röhren-Codex 1948/49
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren

7_83.png A4D: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
 

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