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One-Kilowatt Tetrode for UHF Transmitters

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2 Author(s)
Bennett, W.P. ; Tube Dept., Radio Corporation of America, Lancaster, Pa. ; Kazanowski, H.F.

A forced-aircooled power tetrode capable of delivering 1,200 watts output in television service at frequencies up to 900 mc is described. Particular features of the design include a coaxial electrode structure, novel metal-to-ceramic seals, and a unipotential matdx-type cathode having a 120-volt heater. A discussion is included of the special parts-making techniques and precision assembly methods in which radio-frequency heating is used together with accurate jigging to maintain uniform electrode spacings. A typical 900-mc circuit for use with the tube is described and tube performance data as a cathode-driven amplifier are given.

Published in:

Proceedings of the IRE  (Volume:41 ,  Issue: 1 )