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ID = 56315
Great Britain (UK)
Brand: BTH (B.T.H.), British Thomson-Houston Co, Ltd.
Developer: BTH (B.T.H.), British Thomson-Houston Co, Ltd. 
Tube type:  TRANSMITTING TUBE (general)   Text 
  <1925 very rare. ***
Identical to NT5 = T5_Osram
Similar Tubes
Normally replaceable-slightly different:

Base Edison (candelabra) 12 mm Other combinations of connections.
Was used by Transmittertube (Radio)
Filament Vf 5.6 Volts / If 1.6 Ampere / Direct / Battery =

British Navy transmitting tube - filament volts 5.6, filament current 1.6 amps, 20 watts

Dimensions (WHD)
incl. pins / tip
x 85 x 50 mm / x 3.35 x 1.97 inch
Weight 31 g / 1.09 oz
Information source British Radio Valves - The Vintage Years, Thrower   p. 130
NT5: Fin Stewart collection
Fin Stewart


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