radiomuseum.org

U12

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ID = 3071
       
Country:
Great Britain (UK)
Brand:
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to U12 = FW
First Source (s)
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
Description

Va <350V rms. Ia <120mA mean. (0.7EUR in 1938)

 
Information source - - Manufacturers Literature   
The Saga of Marconi Osram Valve   p. 152 & 330
History of the British Radio Valve to 1940
Taschenbuch zum Röhren-Codex 1948/49
Tube Tester Data Avo CT160
u12_in262.gif
U12: "Trader" Service Sheet 518
Georg Richter
u12_so.png U12: rtt
Anonymous 10 Collector
More ...
Just Qvigstad 		u.12_osram.png
U12: osram wireless guide 1931
Giuseppe Antonio Tusini
More ...
Usage in Models 3= 1931 ; 1= 1932? ; 13= 1932 ; 4= 1933? ; 23= 1933 ; 1= 1934?? ; 5= 1934? ; 25= 1934 ; 1= 1935? ; 27= 1935 ; 3= 1936? ; 48= 1936 ; 1= 1937? ; 18= 1937 ; 3= 1938 ; 5= 1945?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):181

Collection of

Jean-Jacques Pontigny (F)
Collection of a member from D
Niclas Pettersson (S)
Roy Johnson (GB)
Rodolfo Gaston Wenceslao Nasasta (RA)
Hartmut Völler (D)
Collection of a member from FIN
Georges Werts (B)
 
u12001.jpg

U12
 

Variants

U12 with dome bulb
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