Yes, ALL crystals drift with age. Strangely enough, it's called 'aging'!! :-)
The rate at which they age varies with the cut of the quartz, frequency, the manufacturer's quality control, storage temperature, operating current, etc., etc., etc. The original frequency spec is +/- 0.003%.
73, Garey - K4OAH Glen Allen, VA Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line and TR-4/C Service Supplement CDs <www.k4oah.com> Neil M Califano wrote:
Do aging Drake crystals lose accuracy?
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