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R203-D

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ID = 77634
       
Country:
Canada
Brand: Northern Electric Co. Ltd.; Montreal, QC ; Belleville, ON
Developer: Western Electric Company Inc.; New York (NY) 
Tube type:  Transmitting Triode, air cooled   Universal 
Identical to R203-D
Similar Tubes
Normally replaceable-slightly different:
  UV203

Base Jumbo 4-pin bayonet (1918)
Was used by Transmittertube (Radio)
Filament Vf 10 Volts / If 6.5 Ampere / Direct / Battery =
Information source -- Collector info (Sammler)   
Tube Lore (II)   Page 34

jumbo_4_pin_transmitting_base~~1.png R203-D: Fin Stewart
Fin Stewart


Just Qvigstad
 

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