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RO4215

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ID = 14758
       
Country:
France
Brand: Visseaux / Télévisso; Lyon / Paris
Tube type:  Triode, vacuum   Detector 
Identical to RO4215
Similar Tubes
Normally replaceable-slightly different:
  A415
Other base:
  RO4215_7pin
First year 1928 Saga of the Vacuum Tube, Tyne page 403, 414
First Source (s)
Jan.1930 : L'Histoire Singulière du Tube Radio; G. Duperray 2009

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.08 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   


Just Qvigstad

Collection of

 
f_visseaux_radio_ro4215_front.jpg

RO4215
 

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