Antique radios, Old Time Radios

1A7

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

Tube ID = 19219


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Identical to	1A7
Similar Tubes	Normally replaceable-slightly different: IW3

Base	Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ut) Top contact with a cap
Was used by	Radio/TV-reception etc.
Filament	Vf 1.4 Volts / If: 0.05 Ampere / -: Direct / -: Battery = /
Description	A metal tube 1A7 was never existing. Octal- battery tubes were only made as glas types (1A7G, 1A7GT). We list the 1A7 because some schematics list as 1A7. Text in other languages (may differ)
Literature	Essential Characteristics, GE 1973 Taschenbuch zum Röhren-Codex 1948/49


	Internet Miguel Angel Trujillo-Rodriguez

C.M.
Mario Coelho

Tabu Röhren-Codex, 1948
Anonymous 15 Collector

Usage in Models (calculation each 25th of the month)	3= 1934 ; 1= 1938 ; 3= 1939? ; 8= 1939 ; 8= 1940?? ; 2= 1940? ; 11= 1940 ; 7= 1941?? ; 1= 1941? ; 8= 1941 ; 7= 1942?? ; 7= 1942? ; 3= 1942 ; 10= 1946?? ; 12= 1946 ; 6= 1947?? ; 7= 1947 ; 5= 1948?? ; 2= 1948? ; 7= 1948 ; 4= 1949?? ; 1= 1949 ; 4= 1950?? ; 5= 1951?? ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 132

No further Information for

1A7

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