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PH257

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ID = 56189
       
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 PH257 = PH57 = 57

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
Information source - - Manufacturers Literature   1932
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472_4~~2.png PH257: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
 

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