[time-nuts] My Casio G-Shock watch and other fun stuff

Brooke Clarke brooke at pacific.net
Thu Jun 21 11:10:21 EDT 2007

Hi Tom:

How was that data taken with, a Microset or some other way?
It's interesting in that it shows the rate was not adjusted.

The Heathkit GC-1000 WWV/WWVH clock adjusted it's rate.

Have Fun,

Brooke Clarke

Tom Van Baak wrote:
>>Now, I cannot actually say that the Casios or any other brands actually
>>discipline their oscillator. I know that the cheap WWVB-locked wall clocks
>>are not disciplined - if they're running fast 2 seconds a day, then every
>>night they just jump back two seconds.
> Correct. I have heard one or two brands of RC clock use a
> disciplining model but most behave just as you describe.
> Example: for plots of a Junghans RC wristwatch gaining
> 160 ms per day, every day, see:
> http://www.leapsecond.com/pages/Junghans/
> /tvb
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