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ID = 25716
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Triode, vacuum   UHF 
Identical to DET24 = CV397 = TD04-20
Similar Tubes
Normally replaceable-slightly different:
Other class quality (otherwise equal):
Predecessor Tubes E1769  

Base COAXIAL in general (X..)
Filament Vf 6.3 Volts / If 1 Ampere / Half indirect

UHF planar triode capable of operating up to 2GKz. 400V max anode voltage, 600mA peak current, 20W max anode dissipation, mu 28. As common grid UHF oscillator DET24 can deliver up to 14W at 600MHz, out power decreasing for higher frequencies.

Information source - - Manufacturers Literature   
The Saga of Marconi Osram Valve   p. 270

rocket.png DET24
Emilio Ciardiello

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