Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!bbn!usc!elroy!jato!randy
From: randy@jato.Jpl.Nasa.Gov (Randy Hammock)
Newsgroups: comp.sys.amiga.tech
Subject: Re: TICK and J300
Message-ID: <1260@jato.Jpl.Nasa.Gov>
Date: 17 May 89 01:25:40 GMT
References: <3319@hplabsz.HPL.HP.COM> <1410017@hpcvca.CV.HP.COM>
Reply-To: randy@jato.UUCP (Randy Hammock)
Organization: Jet Propulsion Laboratory, Pasadena, CA
Lines: 13

In article <1410017@hpcvca.CV.HP.COM> charles@hpcvca.CV.HP.COM (Charles Brown) writes:
>              The power companies are already quite good during the
>day.  Then near midnight they adjust their frequency so that the total
>number of cycles in the day is right on.  You should see no drift
>unless you are experiencing power outages. ...

I seem to recall reading a few years ago that the power companies regulate
the line frequency such that a clock that derives its timing from the power
line will be accurate within +/-3 sec/yr.  Unless you are looking for
instantaneous stability, the power line is one of the best sources to drive
a TOD clock.  If you want anything better, you could get the HeathKit clock
that has the WWV receiver built-in such that it decodes the NBS WWV time
codes.