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55

Information - Help 
ID = 2972
       
Country:
United States of America (USA)
Brand:
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to 55 = UZ-55 = A255 = CV2537 = PH55 = 255 = NU-55 = ER55
Similar Tubes
Other shape (e.g. bulb type):
  55S ; G-55-S
Other class quality (otherwise equal):
  NU-55S
Heater different:
  85
Other base and other heater:
  6C7 ; 6V7G
First year 1931 Radios von gestern, 2. Auflage
First Source (s)
Sep.1932 : -- Collector info (Sammler)
Successor Tubes 85   6C7  

Base 6-Pin-Base U6A, old, USA (Codex=Ka)
Filament Vf 2.5 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)
Tube prices 1 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  55.png
  55: Internet
Miguel Angel Trujillo-Rodriguez
 
55~~1.jpg
55: 1931
Tor Steinnes

 
461_1.png
55: Telefunken Werkstattbuch
Wolfgang Bauer

 
55_techdat01.png
55: Sylvania Technical Manual
Peter Hoddow


Usage in Models 8= 1932?? ; 35= 1932? ; 186= 1932 ; 22= 1933?? ; 18= 1933? ; 180= 1933 ; 8= 1934?? ; 23= 1934? ; 63= 1934 ; 6= 1935?? ; 10= 1935? ; 21= 1935 ; 2= 1936?? ; 4= 1936? ; 6= 1936 ; 2= 1937 ; 1= 1938?? ; 1= 1940?? ; 2= 1941? ; 1= 1942? ; 1= 1942 ; 2= 1945? ; 1= 1947?? ; 1= 1948?? ; 1= 1962? ; 1= 9999?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):606


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