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B12

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ID = 28418
       
Country:
Great Britain (UK)
Brand: BTH (B.T.H.), British Thomson-Houston Co, Ltd.
Tube type:  Triode, vacuum   Power/Output 
Identical to B12
Similar Tubes
Other base:
  B12_UX
First year 1927 Saga of the Vacuum Tube, Tyne Seite 390
First Source (s)
1927 : British Radio Valves - The Vintage Years: 1904-1925 p.47 & 163

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 7.5 Volts / If 1.25 Ampere / Direct / Specified voltage AC/DC
Information source British Radio Valves - The Classic Years: 1926-1946   Supplement p. 14

b4_base_pins~~112.png B12: Fin Stewart
Fin Stewart


Just Qvigstad
b12bthdocr.png
B12: Miniwatt Livret de comparaison
Patrice Zeissloff

Usage in Models 2= 1929?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2

Collection of

 
b12bthph1s.jpg

B12
 

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