[time-nuts] Thermal impact on OCXO

Bob Camp kb8tq at n1k.org
Sat Nov 5 08:15:43 EDT 2016


You have a first order, second order and third order coefficient to the temperature rate dependance
on a crystal.  Since the second order term is a square, it does not care about the sign of the 


> On Nov 4, 2016, at 9:56 PM, Bob Stewart <bob at evoria.net> wrote:
> In the general case, is the impact of changing the ambient temperature around an OCXO from, say, 40C to 41C the same as changing it from 41C to 40C all else being equal?  IOW, if I somehow have the same temperature ramp over the same time period in both directions, will I wind up with the same frequency and phase, or will the frequency revert but at some phase difference?
> Bob - AE6RV
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