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BigrilleOscill_4pin

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ID = 60585
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Dual-Grid Tetrode   Frequency converter 
  Ca. 1925 up to 1945 rare.
Identical to BigrilleOscill_4pin
Successor Tubes BigrilleOscillatrice  

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Filament Vf 4 Volts / If 0.07 Ampere / Direct / Battery =
Description

Probably an early version of the 5-pin Bigrille Oscillatrice.

 
Dimensions (WHD)
incl. pins / tip
49 x 100 x 35 mm / 1.93 x 3.94 x 1.38 inch
Weight 48 g / 1.69 oz
Information source -- Collector info (Sammler)   Davide Casarosa and Peter den Boer
 
bigriglia_radiofotos_4_pin_2.jpg
BigrilleOscill_4pin: collezione privata
Davide Casarosa

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