Antique radios, Old Time Radios

7A8

Country:	United States of America (USA)		Brand:	Common type USA
			Tube type:	OCTODE Frequency converter

Tube ID = 2725


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Identical to	7A8
First Source (s)	10.Jun.1938 : Electron Tube Registration List
Predecessor Tubes	6D8G

Base	Loctal-8, B8G (Sylvania, 1938) (Codex=Weo)
Was used by	Radio/TV-reception etc.
Filament	Vf 6.3 Volts / If: 0.15 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

Philco 7A8
Howard Craven

Telefunken Werkstattbuch
Wolfgang Bauer

Sylvania Technical Manual
Peter Hoddow

Usage in Models (calculation each 25th of the month)	12= 1938 ; 2= 1939?? ; 69= 1939 ; 1= 1940? ; 29= 1940 ; 1= 1941?? ; 37= 1941 ; 3= 1942? ; 3= 1942 ; 1= 1944 ; 1= 1945 ; 1= 1946? ; 18= 1946 ; 2= 1947?? ; 5= 1947 ; 26= 1948 ; 1= 1949?? ; 8= 1949 ; 1= 1950?? ; 10= 1950 ; 19= 1951 ; 2= 1952?? ; 2= 1952? ; 17= 1952 ; 1= 1953?? ; 2= 1953 ; 1= 1954? ; 6= 1954 ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 281

No further Information for

7A8

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