Varactor - tuned 10MHz ceramic resonator oscillator circuit diagram

Field effect transistor amplifier has fixed bias input source with feedback. Therefore, the input impedance is very high and very low capacitance. Drive a field effect transist

or emitter follower, even though the output impedance is very low, and with 3: 1 turns ratio of a transformer for the supply. It found that only a few ohms impedance ceramic resonator lowest.

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