12SQ7, Tube 12SQ7; Röhre 12SQ7 (12SQ7)

Antique radios, Old Time Radios

12SQ7

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

Tube ID = 2638


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Identical to	12SQ7 = VT-104
Similar Tubes	12SQ7GT (other shape (e.g. bulb, size)) 6SQ7 (Heater different) CV546 (Multiple differences or of other kind)
First Series	1939 -- Collector info (Sammler)
First Source (s)	Feb.1939 : Electron Tube Registration List
Predecessor Tubes	12Q7G 12Q7GT
Successor Tubes	12AT6

Base	Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Vk)
Was used by	Radio/TV-reception etc.
Filament	Vf 12.6 Volts / If: 0.15 Ampere / -: Indirect / -: 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 Karel De Reus

Private collection
Emilio Ciardiello

Telefunken Werkstattbuch
Wolfgang Bauer

SEL Handbuch 1964
Peter Hoddow

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

1= 1933 ; 1= 1934?? ; 1= 1934 ; 2= 1938? ; 2= 1938 ; 11= 1939?? ; 49= 1939? ; 167= 1939 ; 33= 1940?? ; 56= 1940? ; 171= 1940 ; 94= 1941?? ; 80= 1941? ; 198= 1941 ; 57= 1942?? ; 4= 1942? ; 87= 1942 ; 3= 1943? ; 1= 1943 ; 5= 1945?? ; 11= 1945? ; 25= 1945 ; 55= 1946?? ; 76= 1946? ; 349= 1946 ; 58= 1947?? ; 15= 1947? ; 193= 1947 ; 40= 1948?? ; 17= 1948? ; 234= 1948 ; 57= 1949?? ; 45= 1949? ; 105= 1949 ; 34= 1950?? ; 29= 1950? ;

Number of Models with this tube 2798

No further Information for

12SQ7

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