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PH57

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ID = 51270
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Vacuum Pentode 
  Ca. 1925 up to 1945 rare.
Identical to PH57 = 57 = PH257

Base 6-Pin-Base U6A, old, USA Top contact with a cap
Filament Vf 2.5 Volts / If 1 Ampere / Indirect /
Literature - - Manufacturers Literature   1933
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PH57: Telefunken Werkstattbuch
Wolfgang Bauer

 

PH57*Box
   

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