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412BU

Information - Help 
ID = 7465
       
Country:
Great Britain (UK)
Brand: Cossor, A.C.; London
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to 412BU
Similar Tubes
Normally replaceable-slightly different:
  506 ; RGN1054
First Source (s)
1929 : History of the British Radio Valve to 1940 p.168

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Direct / Parallel, (AC/DC)
Description

Va max 2x250V, Ia max 70 mA.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
cossor_412bu.jpg
412BU: D.Z.
Dieter Zwingel

 
412bu.png
412BU: Fin Stewart
Fin Stewart

 

from Just Qvigstad

Usage in Models 1= 1930

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1


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