Antique radios, Old Time Radios

7A7

Country:	United States of America (USA)		Brand:	Common type USA
			Tube type:	Vacuum Pentode RF/IF-Stage Controlling (mu)

Tube ID = 2724


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Identical to	7A7 = 7A7E
Similar Tubes	Other shape (e.g. bulb type): 7A7LM Heater different: 14A7 Other base: 6SK7; 6SK7GT
First Source (s)	09.Dec.1938 : Electron Tube Registration List
Predecessor Tubes	6K7G 6K7GT 6SK7 6SK7GT
Successor Tubes	6BA6 6BJ6 6BD6

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

scc
Christian Schaufelberger

Telefunken Werkstattbuch
Wolfgang Bauer

Sylvania Technical Manual
Peter Hoddow

Usage in Models (calculation each 25th of the month)

4= 1936 ; 1= 1938 ; 3= 1939?? ; 1= 1939? ; 10= 1939 ; 2= 1940?? ; 28= 1940 ; 3= 1941?? ; 1= 1941? ; 58= 1941 ; 4= 1942?? ; 4= 1942? ; 14= 1942 ; 2= 1943? ; 3= 1946?? ; 9= 1946? ; 16= 1946 ; 7= 1947?? ; 7= 1947? ; 31= 1947 ; 7= 1948?? ; 7= 1948? ; 64= 1948 ; 2= 1949?? ; 12= 1949? ; 23= 1949 ; 3= 1950?? ; 7= 1950? ; 2= 1950 ; 11= 1951?? ; 2= 1951? ; 2= 1951 ; 2= 1952?? ; 4= 1952? ; 2= 1959? ; 1= 1959 ;

Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 359

No further Information for

7A7

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