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56

Information - Help 
ID = 2680
       
Country:
United States of America (USA)
Brand:
Tube type:  Triode, vacuum   Universal 
Identical to 56 = A256 = G-56 = ER56 = VT-56 = PH56 = 256 = PH256 = NU-56 = T56 = C-56
Similar Tubes
Other shape (e.g. bulb type):
  56S ; G-56-S
Normally replaceable-slightly different:
  38056 ; Z56
Other class quality (otherwise equal):
  CV611 ; NU-56S
Heater different:
  76
Other base:
  56_Coronet
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 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 / Specified voltage AC/DC
Dimensions (WHD)
incl. pins / tip
x 103 x 38 mm / x 4.06 x 1.50 inch
Weight 34 g / 1.20 oz
Tube prices 2 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

56.png
56: Courtesy Bureau Belper (De Muiderkring, Bussum)
Anonymous 10 Collector

56_sock.png 56: TFK Werkstattbuch
Wolfgang Holtmann

More ...

Just Qvigstad
56_techdat01.png
56: Sylvania Technical Manual
Peter Hoddow

More ...
Usage in Models 1= 1931? ; 21= 1932?? ; 92= 1932? ; 467= 1932 ; 42= 1933?? ; 67= 1933? ; 439= 1933 ; 32= 1934?? ; 46= 1934? ; 166= 1934 ; 19= 1935?? ; 18= 1935? ; 81= 1935 ; 13= 1936?? ; 10= 1936? ; 16= 1936 ; 3= 1937?? ; 8= 1937 ; 2= 1938?? ; 3= 1938 ; 1= 1939?? ; 2= 1939? ; 2= 1939 ; 3= 1940?? ; 1= 1940? ; 2= 1940 ; 1= 1941?? ; 2= 1941? ; 1= 1942? ; 1= 1943?? ; 1= 1945?? ; 1= 1949?? ; 1= 1950?? ; 1= 9999? ; 4= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1570

Collection of

 
sonatron_56_e319.jpg

56
 

Variants

Arcturus version w/ blue bulb

56 with dome 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".


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