DEVELOPMENT OF LINEAR POWER TUBES.
Interim development rept. 17 Feb-16 May 67,
EIMAC SAN CARLOS CALIF
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UHF tetrode oxide cathode designs were optimized to achieve the required intermodulation distortion product ratios of -45 db, or better, third and fifth order, with minimum idling current and with better than 50 per cent plate circuit efficiency. Further information was obtained on the relationships between tube geometry and linearity performance. The range of idling current for optimum linear performance has been defined for two different tube geometries. Experiments were performed in a continuously pumped vacuum system on a moveable electrode planar model approximation of a Th-W filamentary emitter cylindrical tetrode. Intermodulation distortion evaluations were conducted and are reported as a function of electrode geometry. The audio frequency measurement techniques which were employed gave results substantially in agreement with 2 Mc measurements. Author
- Electrical and Electronic Equipment