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7A8 Info
Country:  United States of America (USA)      Brand:  Common type USA 
  Tube type:  OCTODE   Frequency converter 
Tube ID = 2725
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Identical to 7A8
First Source (s) 10.Jun.1938 : Electron Tube Registration List
Predecessor Tubes 6D8G  

Base Loctal-8, B8G (Sylvania, 1938) (Codex=Weo)
Was used by Radio/TV-reception etc.
Filament -: Indirect / -: Parallel / series AC/DC / If: 0.15 Ampere / Vf 6.3 Volts /
Tube prices 0 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

  7a8.gif
  Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Michael Schlör
philcoloktal7a8.jpg
Philco 7A8
Howard Craven

 
562.png
Telefunken Werkstattbuch
Wolfgang Bauer

 
7a8_techdat01.png
Sylvania Technical Manual
Peter Hoddow

Usage in Models   12= 1938 ; 2= 1939?? ; 69= 1939 ; 1= 1940? ; 24= 1940 ; 37= 1941 ; 1= 1942?? ; 1= 1942 ; 1= 1944 ; 1= 1945 ; 3= 1946? ; 18= 1946 ; 2= 1947?? ; 4= 1947 ; 21= 1948 ; 1= 1949?? ; 12= 1949 ; 1= 1950?? ; 10= 1950 ; 18= 1951 ; 2= 1952?? ; 1= 1952? ; 18= 1952 ; 1= 1953?? ; 2= 1953 ; 1= 1954? ; 6= 1954 ; 8= 9999 ;
Number of Models with this tube   278
No further Information for

7A8    

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