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57A

Information - Help 
ID = 9643
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to 57A = G-57A
Similar Tubes
Other shape (e.g. bulb type):
  G-57A-S
Normally replaceable-slightly different:
  57AS

Base 6-Pin-Base U6A, old, USA (Codex=Kf) Top contact with a cap.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
Description Babani gives heater current as 0.4A. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
Babani, International Radio Tube Encyclopaedia
 
57a_so.png
57A: arrl handbook 1972
Michael Schlör

 

from Just Qvigstad

Usage in Models 1= 1932?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

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