[time-nuts] Oscilloquartz 8601 Rebuild Question
jfor at quikus.com
Sun Jul 31 00:29:42 UTC 2011
>> That will give you a static match, not necessarily a dynamic match.
>> Consider if you filled the Dewar with mercury.
> Certainly a thermos of mercury would have much different thermal
> behaviour than an oscillator, but I don't have a thermos of mercury. I
> think what you're getting at is whether my replacement thermal system
> has similar dynamic thermal characteristics to the original.
Yes. You should, IMO, try to match the heat leak and the thermal inertia
to keep the loop dynamics the same.
> Unfortunately, there's no way for me to test that since the original is
> smashed. Static comparison is all I can do.
You can try to keep the Dewar internals as near as possible to the
original. That and the leakage should roughly do it.
>>> Of course, if you go too far in reducing the current, the oven could
>>> overheat. The oscillator includes a precision thermistor to monitor
>>> temperature of the oven to prevent this.
>>> Any comments?
>> Good luck.
> Thanks. This is turning into an interesting project.
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> and follow the instructions there.
More information about the time-nuts