SWITCHED_CRYSTALS

Published:2009/7/2 7:28:00 Author:May | From:SeekIC

High stability is combined with multichannel selection by diode switching of crystals in range of 2-20 MHz, used in series-resonant mode. L1 is about 30 μH at 2 MHz and 1 μH at 20 MHz. Q1 is 2N708, HEP50, BC108, or similar NPN RF type Diodes are switching types such as BAY67.-U. Rohde, Stable Crystal Oscillators, Ham Radio, June 1975, p 34-37.



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