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6AS7GT

Information - Help 
ID = 15254
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  LOCKED OFF TUBE (CODE 9) - see in Notes   Power/Output 
Identical to 6AS7GT = 6SA7GT

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Vk)
Filament Vf 6.3 Volts / If 2.5 Ampere / Indirect / Parallel, (AC/DC)
Description Note: no 6AS7GT was ever registered. The 6AS7G was registered in January 1946 and the first tubular envelope variant, the 6AS7GA, was registered in 1955.
Almoste certainly this tube was created due to a mistyping, 6AS7GT instead of the well known converter 6SA7GT. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
 

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