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RO4142

Information - Help 
ID = 12937
       
Country:
France
Brand: Visseaux / Télévisso; Lyon / Paris
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to RO4142
Similar Tubes
Normally replaceable-slightly different:
  A442
First year 1929 Saga of the Vacuum Tube, Tyne page 414
First Source (s)
Feb.1930 : L'Histoire Singulière du Tube Radio; G. Duperray 2009

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Er)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.06 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
ro4142.jpg
RO4142: Mia collezione privata
Osvaldo Forlani

 
ro4142.png
RO4142: Visseaux-Radio Datasheet
David Zeller


from Just Qvigstad


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