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57

Information - Help 
ID = 2681
       
Country:
United States of America (USA)
Brand:
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to 57 = UZ-57 = A257 = VT-57 = W2161 = PH257 = ER57 = NU-57 = PH57 = VT155_GPO = CV1704 = T-57
Similar Tubes
Other shape (e.g. bulb type):
  G-57-S ; M57
Normally replaceable-slightly different:
  38057 ; 57E
Other class quality (otherwise equal):
  57S ; CV612 ; NU-57S
Heater different:
  77
Other base:
  57_Coronet ; RJ571
Other base and other heater:
  6D7
First year 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) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC
Dimensions (WHD)
incl. pins / tip
x 123 x 39 mm / x 4.84 x 1.54 inch
Weight 42 g / 1.48 oz
Tube prices 2 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

57.png
57: Courtesy Bureau Belper (De Muiderkring, Bussum)
Anonymous 10 Collector

472_4.png 57: Telefunken Werkstattbuch
Wolfgang Bauer

More ...

Just Qvigstad
57_techdat01.png
57: Sylvania Technical Manual
Peter Hoddow

More ...
Usage in Models 3= 1931? ; 6= 1931 ; 29= 1932?? ; 98= 1932? ; 481= 1932 ; 55= 1933?? ; 79= 1933? ; 510= 1933 ; 48= 1934?? ; 52= 1934? ; 164= 1934 ; 34= 1935?? ; 25= 1935? ; 55= 1935 ; 18= 1936?? ; 23= 1936? ; 21= 1936 ; 3= 1937?? ; 1= 1937? ; 4= 1937 ; 3= 1938?? ; 2= 1938? ; 3= 1938 ; 1= 1939?? ; 4= 1939? ; 1= 1939 ; 4= 1940?? ; 1= 1940 ; 1= 1941?? ; 6= 1941? ; 1= 1942? ; 2= 1943?? ; 3= 1947?? ; 1= 1948?? ; 1= 1949?? ; 1= 9999? ; 3= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1747

Collection of

 
57_lmp1.jpg

57
 

Variants

Metal coated cylindrical glass version. Complete name: M57. The letter "M" appears only on the boxes and enclosed paperwork, not on the tubes. Please klick here: M57


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