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ID = 17483
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Triode, vacuum   Power/Output 
Identical to 4033AF = CV2743
Similar Tubes
Other class quality (otherwise equal):

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Filament Vf 6 Volts / If 1.4 Ampere / Indirect
Description Power triode usable up to 2MHz and with reduced plate voltage up to 10MHz. 25W plate dissipation.
As class-A audio amplifier at 400V Va and -20V Vg delivers 4W undistorted on 7K load.
Identical to 4033A, screened for use in aircraft radio. 
Information source - - Manufacturers Literature   

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