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ID = 28897
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Developer: Western Electric Company Inc.; New York (NY) 
Tube type:  Transmitting Triode, air cooled   Universal 
  <1925 rare.
Identical to VT-4 = CW-1818 = 211A = G_Western

Base Jumbo 4-pin bayonet
Was used by Military and/or Government
Filament Vf 10 Volts / If 3.4 Ampere / Direct / Parallel / series AC/DC

This tbe was designated VT-4 by the United States Army Signal Corps and was used in 1918 in World War One. It was released as the 211A commercially in 1921.

Dimensions (WHD)
incl. pins / tip
x 184 x 51 mm / x 7.24 x 2.01 inch
Weight 180 g / 6.35 oz
Information source Saga of the Vacuum Tube, Tyne   page 280, 293, 294

Usage in Models 1= 1929

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

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