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ID = 28653
       
Country:
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Developer: Western Electric Company Inc.; New York (NY) 
Tube type:  High-vacuum Rectifier   Power/Output 
Identical to NN = 221A

Base Jumbo 4-pin bayonet (1918) Top contact with a cap.
Was used by Transmittertube (Radio)
Filament Vf 5 Volts / If 10 Ampere / Direct
Description

Project coding for 221A.

 
Information source Saga of the Vacuum Tube, Tyne   page 280
Tube Lore (II)   p. 235

221a~~1.gif NN: Fin Stewart
Fin Stewart


Just Qvigstad
 

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