Antique radios, Old Time Radios

7S7

Country:	United States of America (USA)		Brand:	Common type USA
			Tube type:	Triode-Heptode Frequency converter Controlling (mu)

Tube ID = 2108


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Identical to	7S7 = X148
Similar Tubes	Heater different: 14S7
First Source (s)	19.May.1941 : Electron Tube Registration List
Predecessor Tubes	7J7 6K8GT

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 /
Dimensions (WHD)	30 x 71 x mm / 1.18 x 2.80 x inch
Weight	21 g / 0.74 oz
Tube prices	0 Tube prices (visible for members only)
Literature	Essential Characteristics, GE 1973 Data SYLVANIA Tubes book Taschenbuch zum Röhren-Codex 1948/49


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

P.ST
Peter Steffen

Telefunken Werkstattbuch
Wolfgang Bauer

Sylvania Radio Tubes Technical Manual
Didier Tholomier

Usage in Models (calculation each 25th of the month)	1= 1940?? ; 10= 1942 ; 3= 1945? ; 1= 1945 ; 1= 1946?? ; 16= 1946 ; 1= 1947?? ; 1= 1947? ; 25= 1947 ; 1= 1948? ; 24= 1948 ; 1= 1949?? ; 3= 1949? ; 8= 1949 ; 1= 1950?? ; 2= 1950? ; 27= 1950 ; 4= 1951? ; 8= 1951 ; 1= 1952? ; 2= 1952 ; 1= 1953?? ; 3= 1953? ; 5= 1953 ; 1= 1954?? ; 2= 1955?? ; 1= 1955? ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 154

Further Information for

7S7

7S7 (30.07.2005) Willy De Grande	Clicks: 467 Replies: 1
Beschreibung : Triode - Heptode-converter : 7S7 auser/Uf 6.3V/= 14S7/Uf12.6v/ Changeur de frequence triode-heptode. Data SYLVANIA Tubes book Abmessungen : Dia. 30 mm / L (u.a) 71 mm. More ...

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