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D40

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ID = 14045
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Triode, vacuum   VHF 
  Ca. 1925 up to 1945 rare.
Identical to D40
Similar Tubes
Normally replaceable-slightly different:
  A435 ; DZ3529 ; H410

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 4 Volts / If 0.12 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   2-9-1933
 
d40.jpg
D40: Prospectus Mai 1932
Christian ADAM

 
b9small_2.png
D40: own collection
Peter den Boer

 
miniwattsmall2_10.png
D40: own collection
Peter den Boer


from Just Qvigstad

Usage in Models 1= 1927?? ; 1= 1930??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2

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