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B3_BTH

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ID = 28084
       
Country:
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:  Triode, vacuum   Universal 
  <1925 rare.
Identical to B3_BTH
First Source (s)
1923 : Saga of the Vacuum Tube, Tyne
1924 : British Radio Valves - The Vintage Years: 1904-1925 p.45

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 1.8 Volts / If 0.35 Ampere / Direct / Battery =
Description

Va <80. Made at the Mazda Lamp Works

 
Information source - - Manufacturers Literature   1925 Brown Brothers Catalog 217
- - Manufacturers Literature   not dated

b4_base_pins~~103.png B3_BTH: Fin Stewart
Fin Stewart


Just Qvigstad
bht_b3.png
B3_BTH: Wireless World No. 303. WEDNESDAY, JUNE 3RD, 1925. VOL. XVI. No. 17 p.549
Thomas Günzel † 1.8.22

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B3_BTH
 

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