Antique radios, Old Time Radios

7F7

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

Tube ID = 3144


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Identical to	7F7
Similar Tubes	Other base: 6SL7GT
First Source (s)	12.Jun.1939 : Electron Tube Registration List
Predecessor Tubes	6SL7GT 6SL7
Successor Tubes	12AX7 VT-189

Base	Loctal-8, B8G (Sylvania, 1938) (Codex=W)
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.N.
Anonymous 124 Collector

Telefunken Werkstattbuch
Wolfgang Bauer

Sylvania Technical Manual
Peter Hoddow

Usage in Models (calculation each 25th of the month)	1= 1936 ; 1= 1940?? ; 2= 1940 ; 1= 1941?? ; 5= 1941 ; 1= 1942? ; 10= 1942 ; 2= 1945? ; 1= 1945 ; 1= 1946?? ; 1= 1946? ; 6= 1946 ; 3= 1947?? ; 1= 1947 ; 3= 1948?? ; 4= 1948? ; 9= 1948 ; 4= 1949?? ; 7= 1949 ; 9= 1950?? ; 1= 1950? ; 3= 1950 ; 6= 1951?? ; 3= 1951 ; 4= 1952?? ; 3= 1952 ; 5= 1953?? ; 1= 1956 ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 98

No further Information for

7F7

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