465_kHz_FOR_IF_TUNE_UP

Published:2009/7/2 9:24:00 Author:May | From:SeekIC

Simple crystal oscillator using National LM3909N is adjusted to exactly desired frequency with capacitor in series with pin 8. Drain from AA cell is less than 0.5 mA at 1.2 V. Use 465-kHz crystal and couple oscillator to receiver input with 100-pF capacitor. With 100-kHz crystal, circuit will generate strong harmonics beyond 30 MHz; to zero-beat with WWV, use about 10 pF in series with erystal.-I. Queen, Simple Crystal Oscillator, Ham Radio, Nov, 1977, p 98.



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