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C9_Fotos

Country:  France      Brand:  Grammont (Fotos); Malakoff et Paris 
  Tube type:  Triode, vacuum   Universal 
  Ca. 1925 up to 1945 rare.
Tube ID = 19051
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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. 
Text in other languages (may differ)
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   2-9-1933

c9_1.jpg
C9_Fotos: CA
Christian ADAM

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

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