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D400A

Information - Help 
ID = 49614
       
Country:
United States of America (USA)
Brand: DeForest-Tubes
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Gas Triode   Detector 
  Ca. 1925 up to 1945 rare.
Identical to D400A = UX200A = 00A = SX200A = 200A = TC200A = 5VD_vanHorne

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 0.25 Ampere / Direct / Battery =
Description

Tube fitted with "isolantite" base ( a type of ceramic)

 
Dimensions (WHD)
incl. pins / tip
45 x 117 x mm / 1.77 x 4.61 x inch
Weight 47 g / 1.66 oz
Information source - - Manufacturers Literature   1927
70 Years of Radiotubes and V.   Page 166
 
de_forest_d400a.jpg
D400A: Worthpoint photo
Fin Stewart

 
4a_ux4~~16.png
D400A: own collection
Peter den Boer

 
d400asmall.png
D400A: own collection
Peter den Boer

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