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U31

Information - Help 
ID = 3207
       
Country:
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to U31
Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=K)
Filament Vf 26 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
Description Va<250 rms. Ia <100mA mean. (0.7EUR in 1938) 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip		 45 x 122 x mm / 1.77 x 4.80 x inch
Information source - - Manufacturers Literature   
Taschenbuch zum Röhren-Codex 1948/49   
u31_app.png
U31: Manufacturer's Literature
Emilio Ciardiello
s_259_g_1.gif U31: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20

Just Qvigstad 		u31_1.png
U31: Manufacturer's Literature
Emilio Ciardiello
More ...
Usage in Models 3= 1937 ; 1= 1938?? ; 3= 1938? ; 3= 1938 ; 2= 1939? ; 4= 1939 ; 12= 1940 ; 1= 1941 ; 1= 1946 ; 1= 1947?? ; 2= 1947? ; 2= 1947 ; 1= 1948?? ; 2= 1948? ; 2= 1948 ; 1= 1949? ; 3= 1949 ; 8= 1950 ; 1= 1951? ; 3= 1951 ; 2= 1952
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):58

Collection of

Alberto Ammendola (I)
Frank Cuffe (IRL)
Fernando Monteiro (P)
Michael Niermann (D)
 
u31_2~~1.jpg

U31
 
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