[time-nuts] Some More questions

Chuck Harris cfharris at erols.com
Thu Jan 19 09:38:12 EST 2006

Poul-Henning Kamp wrote:
> In message <43CF928D.4030101 at erols.com>, Chuck Harris writes:
>> It would be interesting to see how such an oven performs compared
>> to the traditional double oven.
> According to a guy at the danish metrology lab, the optimal strategy
> is moving as little heat as you can get away with.

But that brings us back full circle:  How do you do an exceptional
job of controlling the temperature of a crystal that was designed
to operate at 25C?

You cannot just leave it in a room temperature box, and expect it
to remain stable.  You need to mimic what is done with a conventional
double oven, only with an "ambient" temperature that is well below the
desired operating point of the crystal.  The Peltier would provide
that reduced "ambient" temperature.

I read the article you are talking about, and what he says is true,
to a point.  He is talking about maintaining the stability of
instruments that are designed to run at room temperature.  These
instruments already have conventional double ovens around their
sensitive bits.


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