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ID = 59127
Great Britain (UK)
Brand: Osram-Valves GB (not MO-Valves)
Developer: Osram-Valves GB (not MO-Valves) 
Tube type:  Transmitting Triode, air cooled 
  <1925 very rare. ***
Identical to t2B

Base Wires Wires only.
Was used by Military and/or Government
Filament Vf 10.8 Volts / If 3.6 Ampere / Direct / Specified voltage AC/DC

250 watt transmitting tube operating at 2000 anode volts. First made by Osram Lamp Works August 1917. British Navy version NT2B.

Information source British Radio Valves - The Vintage Years: 1904-1925   Pages 78, 128 & 130


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