[time-nuts] Chronometer contest sponsored by IEEE Spectrum

Jeff Mock jeff at mock.com
Sat Dec 1 04:06:34 EST 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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