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1A7

Information - Help 
ID = 19219
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Pentagrid-Converter (Heptode)   Pentagrid (old)   Controlling (mu) 
Identical to 1A7

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ut) Top contact with a cap
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   
  valvula1a7.png
  1A7: Internet
Miguel Angel Trujillo-Rodriguez
 
1a7a_1.jpg
1A7: C.M.
Mario Coelho

 
1a7_sock.png
1A7: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

 
1a7_dat.png
1A7: elektron taschenbuch 1952
Heinz Höger


Usage in Models 2= 1935? ; 1= 1935 ; 1= 1939?? ; 4= 1939? ; 9= 1939 ; 8= 1940?? ; 5= 1940? ; 16= 1940 ; 7= 1941?? ; 1= 1941? ; 8= 1941 ; 7= 1942?? ; 13= 1942? ; 7= 1942 ; 1= 1945 ; 11= 1946?? ; 1= 1946? ; 14= 1946 ; 7= 1947?? ; 8= 1947 ; 6= 1948?? ; 2= 1948? ; 7= 1948 ; 4= 1949?? ; 3= 1949 ; 8= 1950?? ; 5= 1951?? ; 1= 1952?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):167


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