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B23_BTH

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ID = 28421
       
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   Power/Output 
Identical to B23_BTH
First year 1927 Saga of the Vacuum Tube, Tyne Seite 390

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.2 Ampere / Direct / Battery =
Information source History of the British Radio Valve to 1940   Page163
L'ABCDaire des lampes de TSF des jeunes années   p. 77
British Radio Valves - The Classic Years: 1926-1946
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren

b4_base_pins~~115.png B23_BTH: Fin Stewart
Fin Stewart


Just Qvigstad
 
bth_b23_nvm.jpg

 

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