Phase detector (CB8155E)

This circuit was found in a 1967 Electronic Design. The FET is from that time. Capacitor C is determined by the frequency of the signal worked.

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Preamplifier and Tone Control (CB19235E)
This circuit is from a 1972 Motorola publication. Some of the used transistors can still be found,...
LMX2594 PLatinum RF Synthesizer - Texas Instruments
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