Antique radios, Old Time Radios

57

Country:	United States of America (USA)		Brand:	Common type USA tube
			Tube type:	Vacuum Pentode RF/IF-Stage

Tube ID = 2681

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Identical to	57 = PH257 = 257 = UZ-57 = A257 = VT-57 = W2161 = PH57
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
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: Courtesy Bureau Belper (De Muiderkring, Bussum) Michael Schlör

57: Herbert Odermatt (eig. Sammlung)
Herbert Odermatt + 26.Nov.05

57: Telefunken Werkstattbuch
Wolfgang Bauer

57: Sylvania Technical Manual
Peter Hoddow

Usage in Models

1= 1931?? ; 13= 1931? ; 13= 1931 ; 21= 1932?? ; 79= 1932? ; 425= 1932 ; 40= 1933?? ; 54= 1933? ; 358= 1933 ; 42= 1934?? ; 39= 1934? ; 116= 1934 ; 26= 1935?? ; 18= 1935? ; 32= 1935 ; 17= 1936?? ; 17= 1936? ; 16= 1936 ; 2= 1937?? ; 2= 1937 ; 3= 1938?? ; 1= 1938? ; 2= 1938 ; 1= 1939?? ; 3= 1939? ; 2= 1940?? ; 1= 1940 ; 7= 1941? ; 1= 1942? ; 3= 1947?? ; 1= 1948?? ; 3= 1949??

Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 1359

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