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57 Info
Country:  United States of America (USA)      Brand:  Common type USA 
  Tube type:  PENTODE   RF/IF-Stage 
Tube ID = 2681
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Identical to 57 = 257 = UZ-57 = A257 = VT-57
Similar Tubes 77 (Heater different)   6D7 (Other base and other base diagram)  
First Series   1932 Radios von gestern
First Source (s) Aug.1931 : 70 Years of Radiotubes and V.
Predecessor Tubes 24A  
Successor Tubes 77   6J7   6C6   6D7  

Base 6-Pin-Base U6A, old, USA (Codex=Kf)
Was used by Radio/TV-reception etc.
Filament -: Indirect / -: Parallel, (AC/DC) / If: 1 Ampere / Vf 2.5 Volts /
Tube prices 0 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

  57.png
  Courtesy Bureau Belper (De Muiderkring, Bussum)
Michael Schlör
57vonarcturus_1.jpg
Herbert Odermatt (eig. Sammlung)
Herbert Odermatt + 26.Nov.05

 
472_4.png
Telefunken Werkstattbuch
Wolfgang Bauer

 
57_techdat01.png
Sylvania Technical Manual
Peter Hoddow

Usage in Models   1= 1930? ; 1= 1931?? ; 11= 1931? ; 11= 1931 ; 21= 1932?? ; 47= 1932? ; 342= 1932 ; 36= 1933?? ; 38= 1933? ; 188= 1933 ; 36= 1934?? ; 28= 1934? ; 66= 1934 ; 9= 1935?? ; 6= 1935? ; 12= 1935 ; 14= 1936?? ; 9= 1936? ; 9= 1936 ; 2= 1937?? ; 1= 1937 ; 2= 1938?? ; 3= 1938 ; 1= 1939?? ; 1= 1939? ; 1= 1940?? ; 3= 1947?? ; 1= 1948?? ; 3= 1949?? ; 12= 9999 ;
Number of Models with this tube   915
No further Information for

57    

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16OctX