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F57

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ID = 49535
       
Country:
France
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Vacuum Pentode   RF/IF-Stage 
  Ca. 1925 up to 1945 rare.
Identical to F57
Similar Tubes
Normally replaceable-slightly different:
  57 ; PH57

Base 6-Pin-Base U6A, old, USA Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC
Dimensions (WHD)
incl. pins / tip
x 120 x 38 mm / x 4.72 x 1.50 inch
Weight 35 g / 1.23 oz
Information source - - Manufacturers Literature   2-9-1933


Just Qvigstad
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F57: own collection
Peter den Boer

 

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