Antique radios, Old Time Radios

7Q7

Country:	United States of America (USA)		Brand:	Common type USA
			Tube type:	Pentagrid-Converter (Heptode) Pentagrid (new)

Tube ID = 4033


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Identical to	7Q7
Similar Tubes	Heater different: 14Q7 Other base: 6SA7GT
First Source (s)	21.Aug.1939 : Electron Tube Registration List
Predecessor Tubes	6A8G 7B8 6SA7GT
Successor Tubes	6BE6

Base	Loctal-8, B8G (Sylvania, 1938) (Codex=Wd)
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

wtzenow
Wesselin Tzenow

Telefunken Werkstattbuch
Wolfgang Bauer

Sylvania Technical Manual
Peter Hoddow

Usage in Models (calculation each 25th of the month)	1= 1936 ; 2= 1940?? ; 1= 1941? ; 6= 1942? ; 17= 1942 ; 1= 1946?? ; 6= 1946? ; 7= 1946 ; 8= 1947?? ; 4= 1947? ; 17= 1947 ; 1= 1948?? ; 6= 1948? ; 39= 1948 ; 4= 1949?? ; 3= 1949? ; 9= 1949 ; 7= 1950?? ; 2= 1950 ; 10= 1951?? ; 1= 1951 ; 3= 1952?? ; 5= 1953?? ; 1= 1959 ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 161

No further Information for

7Q7

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