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203A_UV4

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ID = 30557
       
Country:
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  Triode, vacuum   Universal 
Identical to 203A_UV4 = CW-933 = J_Western = VT-1

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Filament Direct / Battery =
Description

This tube, from WWI, had "iron-clad" electrode structure, with grid punched from nickel sheet, plate ribbed for rigidity and CuNiFe alloy filament.
Also known as VT-1, Signal Corps, or CW-933, U.S. Navy coding.

 
Literature Saga of the Vacuumtube, Tyne   p.99
Tube Lore   Supplement S9
 
203a_vt1.jpg
203A_UV4: Own collection
Valery Gromov

 
203a_so_1.png
203A_UV4: ARRL Handbook 1972
Michael Schlör

 


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