Antique radios, Old Time Radios

U31

Country:	Great Britain (UK)		Brand:	MO Valve Co. Ltd.; GB
			Tube type:	Half-Wave Vacuum Rectifier Power-supply

Tube ID = 3207

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Identical to	U31

Base	Octal (Int.Octal, IO) K8A, USA 1935 (Codex=K)
Filament	Vf 26 Volts / If: 0.3 Ampere / -: Indirect / -: Parallel / series 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
Literature	- - Manufacturers Literature Taschenbuch zum Röhren-Codex 1948/49


	U31: Manufacturer's Literature Emilio Ciardiello

U31: M.N.
Michael Niermann

U31: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe

U31: Manufacturer's Literature
Emilio Ciardiello

Usage in Models	3= 1937 ; 1= 1938?? ; 1= 1938? ; 3= 1938 ; 1= 1939? ; 3= 1939 ; 12= 1940 ; 1= 1941 ; 1= 1946 ; 1= 1947? ; 3= 1947 ; 1= 1948?? ; 1= 1948? ; 1= 1948 ; 1= 1949? ; 2= 1949 ; 2= 1950 ; 1= 1951? ; 2= 1951 ; 2= 1952
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 43

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