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ID = 30556
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Developer: Western Electric Company Inc.; New York (NY) 
Tube type:  Triode, vacuum   Universal 
  <1925 rare.
Identical to VT-1 = CW-933 = J_Western = 203A_UV4
Similar Tubes
Normally replaceable-slightly different:
First year 1917 Saga of the Vacuum Tube, Tyne page 99-101, 154, 291
Successor Tubes 1919   VT-Class-I   B_Moorhead-Shaw  

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Military and/or Government
Filament Vf 2.2 Volts / If 1 Ampere / Direct / Battery =
Description Altough using a UV base it is by no means equivalent to the UV203. The Western Electric engineers had to develop a stable and rugged construction. VT-1 was the US Signal Corps designation for the tube wich was known as Type-J. This same tube was used by the US Navy under the designation CW-933. "The Western Elecric code numbers assigned to this type were in the 203 series, the first being 203A." From 1919 on the VT-Class_I or B_Moorhead could be used instead of this older design. 
Dimensions (WHD)
incl. pins / tip
34 x 102 x 35 mm / 1.34 x 4.02 x 1.38 inch
Tube prices 33 Tube prices (visible for members only)
Information source Saga of the Vacuum Tube, Tyne   p.99
VT-1: own collection
John Koster

More ...
VT-1: Fin Stewart
Fin Stewart

VT-1: own collection
Peter den Boer

from Just Qvigstad

Usage in Models 3= 1917 ; 1= 1918? ; 8= 1918 ; 1= 1919?? ; 9= 1919 ; 4= 1920? ; 14= 1920 ; 3= 1921 ; 1= 1927??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):44

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