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C9_Fotos

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ID = 19051
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Triode, vacuum   Universal 
  Ca. 1925 up to 1945 rare.
Identical to C9_Fotos
Similar Tubes
Normally replaceable-slightly different:
  A409 ; DE4 ; DZ908 ; G407 ; PM3X ; RE074
First Source (s)
1926 : Saga of the Vacuum Tube, Tyne p.403

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 4 Volts / If 0.06 Ampere / Direct / Battery =
Description C9-Triode, maker Fotos in France. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   2-9-1933

1_190.png C9_Fotos: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
miniwattsmall2_2.png
C9_Fotos: own collection
Peter den Boer

Usage in Models 1= 1925?? ; 1= 1927?? ; 1= 1927 ; 1= 1930

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4

Collection of

 
c9radiofotosgrammont.jpg

C9_Fotos
 

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