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Information - Help 
ID = 35419
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  Pentagrid-Converter (Heptode) 
Identical to 400A_WE
Similar Tubes
Heater different:
  1R5 ; 400B_WE

Base Miniatur-7-Pin-Base B7G, USA 1940
Filament Vf 1.15 Volts / Direct
Description Miniature pentagrid converter for telephone repeaters. Same as 1R5 but for filament voltage. 
Dimensions (WHD)
incl. pins / tip
41 x 130 x mm / 1.61 x 5.12 x inch
Information source Tube Lore (I)   
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7at_res_12.png 400A_WE
Emilio Ciardiello

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