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ID = 5688
Tube type:  Beam Power Tube 
Identical to 25CU6 = 25BQ6GTB
Similar Tubes
Heater different:
  12BQ6GTB ; 12CU6 ; 6BQ6GTB ; 6CU6

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament Vf 25 Volts / If 0.3 Ampere / Indirect
Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   

25cu6_so.png 25CU6: rtt
Anonymous 10 Collector

Just Qvigstad
25CU6: RCA Tube Manual
Peter Hoddow

Usage in Models 4= 1955? ; 24= 1956?? ; 6= 1956? ; 1= 1958?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):35

Collection of



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