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The Effect of Q on Power-Amplifier Efficiency

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1 Author(s)
Offner, Franklin F. ; Offner Electronics, Inc., Chicago, Illinois

With class-A operation, loaded-plate-circuit Q does not affect plate efficiency. With extreme class-C operation, Q has a considerable effect. A Q of 50 is required to keep loss in efficiency below 3 per cent. To obtain full benefit from the tank capacitor it must be connected directly from plate to cathode. Connecting the plate or cathode to a tap on the plate inductance results in lowered efficiency.

Published in:

Proceedings of the IRE  (Volume:34 ,  Issue: 11 )