[time-nuts] Cesium Mechanical Chronometer

[Tim Shoppa]

Historically they would have tracked any deviation between the chronometer
and radio standards by updating the rate card, and only rarely adjusted the
chronometer time or rate itself.

I would suggest a more interesting project, is to monitor the ticking of
the Chonometer vs your CSAC (possibly acoustically?) and prepare your own
digital rate card.

Tim N3QE

On Thu, Jan 30, 2020 at 10:50 AM Tom Bales <tob.starhouse at gmail.com> wrote:

> >
> > And now for something completely different:  I am working on a quixotic
> > project to control a standard, detent-escapement marine chronometer
> (e.g.,
> > Hamilton 21) with a CSAC cesium atomic clock module.  Yes, I know this
> > makes no sense--but, then, we're timenuts.  I want the mechanical
> > chronometer to function normally if the CSAC signal, presumably a 1pps
> > pulse, is lost.  The CSAC will be GPS disciplined, so during normal
> > operation, with an operating GPS constellation, the time is referenced to
> > UTC via GPS; if GPS is lost, then the CSAC takes over and its 1pps signal
> > drives the chronometer; if all electronics are lost, the chronometer
> hangs
> > in as a mechanical chronometer.  Has anyone any experience with
> > electrically controlling (or disciplining) a marine chronometer?
> >
> >
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