Antique radios, Old Time Radios

6SR7

Country:	United States of America (USA)		Brand:	Common type USA
			Tube type:	Double Diode-Triode Audio Frequency

Tube ID = 2720


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Identical to	6SR7 = 6g1 = VT-233
Similar Tubes	Other shape (e.g. bulb type): 6SR7GT Heater different: 12SR7; 6ST7 Different connections: 6R7; 6R7G; 6R7GT Other base: 6BF6
First Source (s)	01.Apr.1940 : Electron Tube Registration List
Predecessor Tubes	6R7 6R7G
Successor Tubes	6BF6 7E6

Base	Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Vk)
Was used by	Radio/TV-reception etc.
Filament	Vf 6.3 Volts / If: 0.3 Ampere / -: Indirect / -: Parallel / series AC/DC /
Tube prices	0 Tube prices (visible for members only)
Literature	Essential Characteristics, GE 1973 Taschenbuch zum Röhren-Codex 1948/49


	Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Michael Schlör

M.F.
Manfred Fries

Telefunken Werkstattbuch
Wolfgang Bauer

SEL Handbuch 1964
Peter Hoddow

Usage in Models (calculation each 25th of the month)	1= 1940 ; 4= 1941? ; 3= 1941 ; 2= 1947?? ; 3= 1947 ; 11= 1948 ; 3= 1949 ; 6= 1950?? ; 3= 1950 ; 2= 1951 ; 5= 1952?? ; 2= 1952 ; 1= 1953? ; 1= 1953 ; 3= 1954?? ; 1= 1955?? ; 1= 1959? ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 52

No further Information for

6SR7

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