lists at rtty.us
Thu Aug 30 10:46:28 UTC 2012
The typical watch crystal has a parabolic temperature coefficient with it's peak near 90F. The slope (and difficulty of correction) goes up as you move away from the peak. A simple drop / add one cycle (or do nothing) in a second approach would be adequate to do all the steering needed.
On Aug 30, 2012, at 12:35 AM, Hal Murray <hmurray at megapathdsl.net> wrote:
>> Well, basically the temperature of a wrist watch is very constant at around
>> 90F. That and a table lookup that gives an adjustment for number of cycles
>> per tick vs temperature.
> My introduction to this area was roughly a comment like that.
> The other half of the comment was that watches keep (much) less-good time if
> you park them on the night stand while you are sleeping.
> These are my opinions. I hate spam.
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