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ID = 15587
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to BF1
Similar Tubes
Heater different:
First Source (s)
1925 : Saga of the Vacuum Tube, Tyne p.402

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.15 Ampere / Direct / Battery =

The BF1 is identical to the BF0, except for the filament voltage and current

Dimensions (WHD)
incl. pins / tip
x 50 x 95 mm / x 1.97 x 3.74 inch
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   

bf1_so.png BF1: rtt
Anonymous 10 Collector

Just Qvigstad
BF1: own collection
Peter den Boer

Collection of



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