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214D

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ID = 28958
       
Country:
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  High-vacuum Rectifier   Power-supply 
Identical to 214D
First year 1926 Saga of the Vacuumtube, Tyne page 291
Predecessor Tubes 214A  

Filament
Description Essentially the 211D with the grid omitted and reduced filament-anode spacing.
Officially replaceable by a diode-connected 242C. 
Text in other languages (may differ)
Literature Saga of the Vacuumtube, Tyne   
Tube Lore   
 

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