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ID = 2974
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Tung-Sol Electric Inc.; Newark (NJ) 
Tube type:  Double Diode-Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 6B8GT
Similar Tubes
Other shape (e.g. bulb type):
  6B8 ; 6B8EG ; 6B8G ; 6Б8 ; 6Б8С
Normally replaceable-slightly different:
Other characteristic (electr. data):
Heater different:
Other base:
Multiple differences or of other kind:
First Source (s)
22.May.1940 : Electron Tube Registration List
Predecessor Tubes 6B7   6B8G  
Successor Tubes 7R7   6SF7GT  

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ui) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

392_6.png 6B8GT: Telefunken Werkstattbuch
Wolfgang Bauer

More ...

Just Qvigstad
6B8GT: Sylvania Technical Manual
Peter Hoddow

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Usage in Models 9= 1940 ; 1= 1941?? ; 1= 1943 ; 1= 1945? ; 1= 1947? ; 3= 1947 ; 2= 1948 ; 2= 1949 ; 2= 1950 ; 1= 1951?? ; 1= 1951? ; 3= 1951

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):27

Collection of



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