[time-nuts] Some More questions
hmurray at suespammers.org
Thu Jan 19 03:32:38 EST 2006
> I agree. And I should have clarified - one uses a hair dryer to
> generally heat the ambient air nearby the device in question. You can
> use a thermometer to sense the external or internal case temperature
> to limit the temperature rise to 10 C or something sane. Do not, of
> course, blast the poor thing with 1500W of direct heat.
I was thinking of a light bulb and a variac/dimmer.
> One problem with that approach is that crystals that are not intended
> for oven operation are optimized for minimum frequency change over 0-50
> or some other "normal" environment temperature range, and at 75 degree C
> or wherever you are going to run the oven at, the temperature
> sensitivity might be much greater than around 25 degrees. So even though
> the oven might reduce the temperature variation by a factor of 10 or
> better, the overall frequency sensitivity may not improve by the same
How about making a graph of freq vs temp for your crystal and see if there is
a flat spot at a convenient temperature?
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