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ID = 56313
Great Britain (UK)
Brand: BTH (B.T.H.), British Thomson-Houston Co, Ltd.
Tube type:  Transmitting Triode, air cooled   Universal 
  <1925 very rare. ***
Identical to A-6v_BTH

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Transmittertube (Radio)
Filament Vf 6 Volts / If 0.84 Ampere / Direct / Battery =

Tube is marked only 6V. Now identified as a type A from 1917. Anode voltage is 400, with an output of 27 watts.

Dimensions (WHD)
incl. pins / tip
x 130 x 60 mm / x 5.12 x 2.36 inch
Weight 65 g / 2.29 oz
Information source British Radio Valves - The Vintage Years: 1904-1925   Page 126

b4_base_pins~~101.png A-6v_BTH: Fin Stewart
Fin Stewart

Just Qvigstad

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