[time-nuts] Stable Watch Clocks
Tom Van Baak
tvb at LeapSecond.com
Wed Dec 12 03:55:45 UTC 2012
> Typical 32KHz clock crystals are very stable in frequency if you can keep them
> close to the turnover temp. If you can hold 1 degC it is .04 ppm.
That's far better than I thought. Do you have a reference for this spec?
I agree you might be able to make one accurate to 0.04 ppm, however briefly, but I've never seen one stable to 0.04 ppm. I mean, that's like 1 second a year.
> I currently have no method for testing such a rig for stability.
Oh, the slipperly slope you are on. I have just the solution for you ...
/tvb
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