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D9

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ID = 15725
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Triode, vacuum   Power/Output 
Identical to D9 = RE134
Similar Tubes
Normally replaceable-slightly different:
  B406 ; DY604 ; L414 ; P410 ; PM4X
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 0.12 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   2-9-1933
1_191.png D9: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		miniwattsmall2_3.png
D9: own collection
Peter den Boer
Usage in Models 1= 1927?? ; 1= 1927
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2

Collection of

Rudolf Osterkamp (D)
Pedro Prieto-Castro (E)
 
grammont_d9_bild1.jpg

D9
 
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