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219D

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ID = 28960
       
Country:
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  High-vacuum Rectifier 
Identical to 219D
First year 1926 Saga of the Vacuumtube, Tyne page 291
Predecessor Tubes 219A  

Filament
Description Essentially the 212D with the grid omitted and reduced filament-anode spacing. 
Literature Saga of the Vacuumtube, Tyne   
 

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