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442BU

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ID = 7467
       
Country:
Great Britain (UK)
Brand: Cossor, A.C.; London
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to 442BU
Similar Tubes
Normally replaceable-slightly different:
  GL4/1
First Source (s)
1931 : History of the British Radio Valve to 1940 p.169
22.Nov.1935 : Wireless World (The), London (WW, 79)

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 2.5 Ampere / Direct / Specified voltage AC/DC
Description

Input 350-0-350 rms; Rectified current <120mA mean.

 
Information source Babani, International Radio Tube Encyclopaedia   p. 256 & 257
Wireless World (The), London (WW, 79)   Data book
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49

17_65.png 442BU: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
442bu_data.png
442BU: COSSOR VALVE MANUAL 1935-6
Jose Casas-Avalos

Usage in Models 2= 1931 ; 3= 1932 ; 1= 1933?? ; 5= 1933 ; 1= 1934? ; 6= 1934 ; 1= 1935?? ; 10= 1935 ; 1= 1936?? ; 2= 1936? ; 5= 1936 ; 11= 1937

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):48

Collection of

Collection of a member from D
 
cossor_442bu.jpg

 

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