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57

Information - Help 
ID = 2681
       
Country:  United States of America (USA)      Brand: Common type USA tube/semicond.
  Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to 57 = PH257 = 257 = UZ-57 = A257 = VT-57 = W2161 = PH57 = VT155_GPO = CV1704
Similar Tubes Other shape (e.g. bulb type):
 G-57-S
Normally replaceable-slightly different:
 38057; 57E
Other class quality (otherwise equal):
 CV612
Heater different:
 77
Other base and other heater:
 6D7
First year   1932 Radios von gestern, 2. Auflage
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)
Filament Vf 2.5 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC) /
Tube prices 0 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

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

 
Variants
 
472_4.png
57: Telefunken Werkstattbuch
Wolfgang Bauer

 
57_techdat01.png
57: Sylvania Technical Manual
Peter Hoddow


Usage in Models 1= 1930?? ; 3= 1931? ; 4= 1931 ; 20= 1932?? ; 91= 1932? ; 460= 1932 ; 44= 1933?? ; 63= 1933? ; 402= 1933 ; 41= 1934?? ; 38= 1934? ; 129= 1934 ; 28= 1935?? ; 21= 1935? ; 43= 1935 ; 18= 1936?? ; 21= 1936? ; 18= 1936 ; 2= 1937?? ; 2= 1937 ; 3= 1938?? ; 2= 1938? ; 2= 1938 ; 1= 1939?? ; 4= 1939? ; 2= 1940?? ; 1= 1940 ; 7= 1941? ; 1= 1942? ; 3= 1947?? ; 1= 1948?? ; 3= 1949?? ; 1= 9999? ; 1= 9999
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1481

57*Box

Mia collezione.

Mia collezione.
 

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