All, I think those clocks only update the time from Boulder 4 times per day. At least my Radio Shack ones do that - you can tell by watching the antenna symbol to show when they're seeking the signal. So if they are a few seconds off during the interim because they are running at slightly different oscillator rates, I would think that's kind of normal. I think the advertised accuracy of "1 second per thousand years" or whatever is not quite correct. But 4 times per day they should be within milliseconds! Ever try listening to WWV and watching the clock at the same time? (Can you tell I need to get a life?)
73, Ed Long WA4SWJ (sorry for the off-topic post) ----- Original Message ----- From: Fred Jensen<mailto:[EMAIL PROTECTED]> To: Elecraft Reflector<mailto:elecraft@mailman.qth.net> Sent: Thursday, October 14, 2004 1:23 PM Subject: Re: [Elecraft] One more re:Atomic Clocks Well ... maybe ... but majorities don't always determine the truth (we all probably knew that ;-). I volunteer at the local blood center where there are four atomic clocks -- two Seiko, and two other different ones I've never heard of. They are all different, all the time, sometimes by as much as 10 seconds. The purpose originally was to synchronize the times recorded during a blood donation (required by the FDA which regulates blood centers). I suggested only one clock in the place. They're thinking about it. Fred K6DGW Auburn CA CM98 Charles Greene wrote: > > Joe, > > Right. You need to buy three, and the majority wins. > > At 08:23 PM 10/13/2004, Joe - aa4nn wrote: > >Whatever you'all do, don't buy TWO atomic clocks. Otherwise you'll never > >know what time it is. I have two MFJ Radio Controlled clocks that after > >two years have finally synced in with UTC but even now they are two > >seconds apart. Go figger. You can manually set the Hours on these clocks > >but not the minutes & seconds. > >73, Joe, aa4nn > > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net<mailto:Elecraft@mailman.qth.net> > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> > Help: http://mailman.qth.net/subscribers.htm<http://mailman.qth.net/subscribershtm> > Elecraft web page: http://www.elecraft.com<http://www.elecraft.com/> _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net<mailto:Elecraft@mailman.qth.net> You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> Help: http://mailman.qth.net/subscribers.htm<http://mailman.qth.net/subscribershtm> Elecraft web page: http://www.elecraft.com<http://www.elecraft.com/> _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
