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56

Information - Help 
ID = 2680
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Triode, vacuum   Universal 
Identical to 56 = C-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 year 1932 First models by RCA with this tube in 1932.
First Source (s)
1932 : The AWA Journal, Quarterly Bulletin of the Antique Wireless Association, Inc. (AWAJ) 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
Anonymous 557 Collector

 
Variants
 
56_sock.png
56: TFK Werkstattbuch
Wolfgang Holtmann

 
56_techdat01.png
56: Sylvania Technical Manual
Peter Hoddow


Usage in Models 16= 1932?? ; 89= 1932? ; 451= 1932 ; 35= 1933?? ; 50= 1933? ; 391= 1933 ; 28= 1934?? ; 37= 1934? ; 144= 1934 ; 17= 1935?? ; 12= 1935? ; 67= 1935 ; 13= 1936?? ; 6= 1936? ; 13= 1936 ; 3= 1937?? ; 7= 1937 ; 2= 1938?? ; 1= 1938 ; 1= 1939?? ; 2= 1939? ; 1= 1939 ; 1= 1940?? ; 1= 1940? ; 2= 1940 ; 1= 1941?? ; 2= 1941? ; 1= 1942? ; 3= 1949?? ; 1= 9999? ; 2= 9999
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1400

56*Box
     

  Variants


Collezione personale
Massimo Pedrina
56*Arcturus_blue

Arcturus version w/ blue bulb

06.Jan.2010 Jacob Roschy

 
56*dome_bulb

56 with dome bulb

06.Jun.2012 Risto Kallberg


mp
Anonymous 413 Collector

A. De Poi's collection
Alessandro De Poi
56*FIVRE violet bulb

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

   

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