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56

Country:  United States of America (USA)      Brand:  Common type USA tube 
  Tube type:  Triode, vacuum   Universal 
Tube ID = 2680
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Identical to 56 = 256 = PH256 = A256 = G-56 = ER56 = VT-56 = PH56
Similar Tubes Other shape (e.g. bulb type):
 56S; G-56-S
Normally replaceable-slightly different:
 38056
Other class quality (otherwise equal):
 CV611
Heater different:
 76
Other base and other heater:
 6P5G
First Source (s) 1932 : The AWA Review Vol. 7, 1992.
Jun.1932 : -- Collector info (Sammler)
Predecessor Tubes 27  
Successor Tubes 76   6P5G   56A  
Base UY-Base, 5 Pins (USA, April 1927) (Codex=H)
Was used by Radio/TV-reception etc.
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   

  56.png
  56: Courtesy Bureau Belper (De Muiderkring, Bussum)
Michael Schlör
56_5.jpg
56: Ingo Moll
Ingo Moll
 
Variants
 
56_sock.png
56: TFK Werkstattbuch
Wolfgang Holtmann
 
56_techdat01.png
56: Sylvania Technical Manual
Peter Hoddow
Usage in Models   1= 1930?? ; 19= 1931? ; 9= 1931 ; 15= 1932?? ; 71= 1932? ; 417= 1932 ; 33= 1933?? ; 48= 1933? ; 346= 1933 ; 31= 1934?? ; 37= 1934? ; 137= 1934 ; 19= 1935?? ; 11= 1935? ; 59= 1935 ; 13= 1936?? ; 4= 1936? ; 14= 1936 ; 3= 1937?? ; 7= 1937 ; 2= 1938?? ; 1= 1938 ; 1= 1939?? ; 1= 1939? ; 1= 1939 ; 1= 1940?? ; 1= 1940? ; 2= 1940 ; 1= 1941?? ; 2= 1941? ; 1= 1942? ; 3= 1949??
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   1311

  Variants


A. De Poi's collection
Alessandro De Poi
56*violet glass

The 56 type tube used to be made in a distinctive violet glass by early FIVRE production. Although color is violet, these tubes are commonly referred and known as "red Fivre tubes".

03.Dec.2007 Alessandro De Poi

  
56*Arcturus_blue

Arcturus version w/ blue bulb

06.Jan.2010 Jacob Roschy
Collezione personale
Massimo Pedrina
   
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