[time-nuts] 4.19 MHz xtal

[Wayne Holder]

The following wikipedia article:

  https://en.wikipedia.org/wiki/Omega_Marine_Chronometer

mentions a "*Marine Chronometer clock using an advanced 4.19 MHz quartz
resonator giving an unparalleled accuracy of less than 5 seconds per year
under calibre 1525*."  My guess is that this crystal technology eventually
found its way into consumer clocks.

Wayne

On Sun, Mar 31, 2019 at 3:02 PM Neville Michie <namichie at gmail.com> wrote:

> Hi,
> I have a Philips quartz clock that runs on 4.19 MHz.
> In spite of the high frequency it still runs for years
> on a C cell.
> Can any of the quartz crystal gurus explain why this
> frequency was chosen? I believe that this clock was
> supposed to have better than usual accuracy.
> Philips always had a high level of engineering excellence.
>
> cheers,
> Neville Michie
>
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