If you want good time use a Rockwell Jupiter GPS it has 1 Hz and 10KHz
signals
that are very very accurate. It give the time in ASCII every second. There
is a
known deviation from GMT. But that is published and can be easily accounted
for.

Gordon
-----Original Message-----
From: Peter L. Peres <plp@ACTCOM.CO.IL>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Monday, November 09, 1998 9:09 AM
Subject: Re: OT: Wanted: schematic of (quartz) thermostat on the web


>On Sun, 8 Nov 1998, Dave VanHorn wrote:
>
>> Your power line is at least that accurate, if not more. They tweak the
>> generator speed by hand, so that in the long term, it's dead on to wwv.
>
>Historically perhaps. Nowadays the hand has no body behind it, and it has
>a legend that says 'IBM' on the side, or something like that.
>
>> In the short term though, it could be dramatically off.
>
>Not really. In a modern country-wide coordinated network operating within
>its normal specs all you get is phase slip, else the whole shebang goes to
>hell very quickly.
>
>Peter