[time-nuts] Chronometer contest sponsored by IEEE Spectrum
Max Robinson
max at maxsmusicplace.com
Sun Dec 2 03:57:49 UTC 2007
That's not good news. I guess I'll have to get one of those atomic watches.
I think they receive their time reference from the GPS rather than WWVB.
Regards.
Max. K 4 O D S.
Email: max at maxsmusicplace.com
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----- Original Message -----
From: "Chuck Harris" <cfharris at erols.com>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Saturday, December 01, 2007 8:44 AM
Subject: Re: [time-nuts] Chronometer contest sponsored by IEEE Spectrum
> Hi Max,
>
> I haven't seen a quartz watch with a trimmer capacitor
> in something like 20 years.
>
> What they do now days is use a microprocessor with flash ram, and
> the timing machine reprograms the microprocessor's second counter
> to trip at the right time.
>
> -Chuck Harris (amateur watchmaker)
>
> 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.
>
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