I’m guilty of starting a thread similar to this one a couple of months back.
My K3 clock drifts and, being a newbie, I wasn’t certain whether it was within spec or not. I learned that it is within spec - but I wanted something more accurate - not because I NEED it, but because I thought it might be a fun project. So I designed and built a GPS clock. It uses a $40 GPS module that has a battery-backed clock chip in it (so it keeps reasonable time when there is no GPS satellite lock). It only needs a single GPS satellite for accurate time. I put it out in my garage because my shack is in the basement and GPS coverage is marginal there. It communicates with the display unit via an XBee Series One radio link, updating the display in my shack (driven by an Arduino Uno) about every 200 milliseconds. Is it overkill? Probably. But I had fun designing it, building it, and writing and debugging the code. I’m a ham… I do things like this because it’s fun - and since I’m not selling it I don’t have to worry too much about how practical it is. It’d be nice if the K3 clock was more accurate - but then I wouldn’t have learned about GPS timekeeping, XBees, and driving an I2C display and GPS unit from an Arduino! :-) 73 Arlen, AA7F > On Feb 15, 2015, at 5:19 PM, Richard Gillingham <[email protected]> wrote: > > > Here in South Florida, atomic clocks will not sync it all. 73, > Gil W1RG > > Sent via the Samsung Galaxy Note® 3, an AT&T 4G LTE smartphone > > <div>-------- Original message --------</div><div>From: Ken G Kopp > <[email protected]> </div><div>Date:02/15/2015 1:25 PM (GMT-05:00) > </div><div>To: "Lynn W. Taylor, WB6UUT" <[email protected]> > </div><div>Cc: Elecraft Reflector <[email protected]>, > [email protected] </div><div>Subject: Re: [Elecraft] Clock chip </div><div> > </div> > Given the tiny size of "atomic clock" / WWVB devices ... as in wrist > watches ... it would seem one could be integrated into both the K3 and KX3 > and make the clock actually usable. > > 73 > > Ken - K0PP > On Feb 15, 2015 11:17 AM, "Lynn W. Taylor, WB6UUT" < > [email protected]> wrote: > >> In which radio? >> >> On 2/15/2015 9:52 AM, Jim Miller wrote: >> >>> Elecraft, Please give us a replacement clock chip that will keep time. An >>> adjust method for what we have? >>> >>> >>> Thanks, Jim KG0KP >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[email protected] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to [email protected] >>> >>> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [email protected] >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
