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D5

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ID = 15724
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to D5
Similar Tubes
Normally replaceable-slightly different:
  B405 ; DX502 ; P414 ; P415 ; PM254X ; RE114
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 0.15 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
b9small_1.png D5: own collection
Peter den Boer

Just Qvigstad 		d5data1small.png
D5: own collection
Peter den Boer
More ...
Usage in Models 1= 1928?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of

Etienne Flemal (B)
Loris Bugamelli (I)
Jean-Louis HEYD (F)
 
dsc_0469~~1.jpg

D5
 
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