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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 Vacuumtube, Tyne p.403

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
Filament Vf 4 Volts / If 0.06 Ampere / Direct / Battery =
Description C9-Triode, maker Fotos in France. 
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   2-9-1933
 
c9radiofotosgrammont.jpg
C9_Fotos: own collection
John Koster

 
1_190.png
C9_Fotos: Telefunken Werkstattbuch
Wolfgang Bauer

 
miniwattsmall2_2.png
C9_Fotos: own collection
Peter den Boer


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

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3


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