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PR-4-A

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ID = 87018
       
Country:
United States of America (USA)
Brand: General Electric Co. (GE); Bridgeport CT, Syracuse NY
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to PR-4-A
Similar Tubes
Normally replaceable-slightly different:
  UV204A

Base Pin-and-blade jumbo (3 contacts) Top contact with a cap.
Was used by Industrial
Filament Vf 11 Volts / If 14.75 Ampere / Direct
Information source Tube Lore (II)   p. 29 & 214


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