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ID = 9645
United States of America (USA)
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to 57S = G-57-S
Similar Tubes
Other class quality (otherwise equal):
  57 ; NU-57
Different connections:

Base 6-Pin-Base U6A, old, USA (Codex=Kf) 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
Description The shield on this tube is metallised paint. Replacement tubes made by National Union, Raytheon and Sylvanis utilised a sheet metal shield. 
Dimensions (WHD)
incl. pins / tip
x 123 x 39 mm / x 4.84 x 1.54 inch
Weight 42 g / 1.48 oz
Information source Taschenbuch zum Röhren-Codex 1948/49   
-- Collector info (Sammler)   

472_5.png 57S: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad
Usage in Models 7= 1932 ; 2= 1933

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):9

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