On 8/5/2019 8:25 AM, [email protected] wrote:

    The crystals are individually tested and the temperature is set at the best 
point of every single crystal .


Per a discussion with Jack Kusters, many or most crystals do not have a
turnover point, but rather a large interval of very low but
non zero tempco.  Thus most oscillators used an 82 degree C setpoint.

Rick

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