[time-nuts] Chronometer contest sponsored by IEEE Spectrum
Jeff Mock
jeff at mock.com
Sat Dec 1 09:06:34 UTC 2007
I found this article randomly this evening, it has some interesting
tidbits about quartz oscillators in watches. I had never heard of the
venerable Sieko "twin quartz" from 1978, good to +/- 5 seconds a year:
http://people.timezone.com/msandler/Articles/CarlosFinalParadigm/FinalParadigm.html
jeff
Max Robinson wrote:
> In my experience watches come from the factory adjusted to gain about 5
> seconds a month. The ones I have owned over the years seemed to be fairly
> stable in that. I have always wished there was a way for someone who is not
> a watch maker to open up such a watch and turn the trimmer capacitor, there
> has to be one, to set it right on. Then it would be much easier to tell how
> the crystal is aging.
>
> Regards.
>
> Max. K 4 O D S.
>
> Email: max at maxsmusicplace.com
>
> Transistor site http://www.funwithtransistors.net
> Vacuum tube site: http://www.funwithtubes.net
> Music site: http://www.maxsmusicplace.com
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