QUARTZ CRYSTAL AGING EFFECTS.
Quarterly rept. no. 3, 15 Aug-15 Nov 63,
GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION
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Aging measurements were conducted on approximately 246 quartz resonators of various types. Of 96 low frequency 100 Kc, 250 Kc, 455 Kc, and 500 Kc resonators only 84 were serviceable after 65 days. Aging rates were high, 5 to 10 ppm during the frst 30 days, but for the last 30 days of the period 68 exhibited aging 5pp10 to the 7th powerwk. The units from three different manufacturers behaved differently and no one manufacturer produced the best units in all categories. The 500 Kc resonators aged markedly less than units of other frequencies. Author