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BWO

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ID = 57714
       
Country:
Great Britain (UK)
Brand: Osram-Valves GB (not MO-Valves)
Developer: Osram-Valves GB (not MO-Valves) 
Tube type:  Triode, vacuum   Text 
  <1925 very rare. ***
Identical to BWO

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Military and/or Government
Filament Vf 6 Volts / If 0.84 Ampere / Direct
Description First made November 1917. 30 watt transmitting tube with 400 - 600 plate volts. Supplied in large quantities to the British Army. 
Dimensions (WHD)
incl. pins / tip
55 x 115 x mm / 2.17 x 4.53 x inch
Information source History of the British Radio Valve to 1940   Pages 69, 70 & 77
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