VARIABLE_CRYSTAL

Published:2009/7/2 9:02:00 Author:May | From:SeekIC

Maximum frequency shift is almost 10 kHz at 5 MHz. Use crystal made especially for variable operation. Frequency stability is good even at extremes of shift. Use 5-20 μH for L1 with crystals from 6-15 MHz, and 20-50 μH for 3-6 MHz. Q1 is 2N3563, 2N3564, 2N5770, BC107, BC547, BF115, BF180, SE1010, or equivalent.-R. Harrison, Sulvey of Crystal Oscillators, Ham Radio, March 1976, p 10-22.



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