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Intermediate-Frequency Amplifiers for Frequency-Modulation Receivers

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1 Author(s)
Adams, J.J. ; Zenith Radio Corporation, Chicago 39, Illinois

In order to obtain the maximum benefits from the frequency-modulation system of broadcasting, it is necessary to give special attention to the selectivity and symmetry of the receiver intermediate-frequency-amplifier channel. Voltage feedbacks must be reduced to a minimum in order to obtain good results in mass production without resorting to some sort of stagger tuning. Selectivity and stability formulas, stabilizing methods, and methods of aligning double-tuned transformers are discussed.

Published in:

Proceedings of the IRE  (Volume:35 ,  Issue: 9 )