Hi Jim: It's common here in the U.S. for the LF clocks to only sync near local midnight. How can you tell if that's happening with your watch or not happening?
I just received one of the C-Max 8000 world mode 3 band LF time receivers, but am busy on another project now. See: http://www.prc68.com/I/Loop.shtml I expect this is the chip used in your LF timing receiver since it's the only one I know of that automatically looks for all three frequencies. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Palfreyman, Jim L wrote: > As posted previously I recently bought a cheap Radio Controlled > multi-band travel clock off ebay and managed to receive the JJY signal > from Japan here in Tasmania, Australia. But only in a certain part of my > house. > > Based on that, I bought a Casio G-Shock Multi Band Solar Radio > Controlled all digital wrist watch. > > Well the bad news was that it couldn't pick up the signal. I still need > to go up a mountain at 3am with it, but certainly I haven't picked up > anything with it yet - the travel alarm clock seems a lot more sensitive > for some reason. > > The good news is that when I got this watch I set it accurately by hand > (of course!) and now two weeks later I still cannot detect any visible > difference as the seconds tick over. In my past experiments I've found > my eyes and ears together can detect at least a 100ms difference > (possibly much better, but this is what I've tested). > > So I wear this watch during the day, take it off at night and it has > maintained an accuracy of under a 1/10 of a second in two weeks - > roughly 2.5 seconds per year if we extrapolate it out. > > Now maybe this is a well designed watch and they are all like that, but > it got me thinking. Of all the millions of watch crystals out there must > be some that just out of pure chance are brilliant time keepers. For any > arbitrary level of precision (e.g. 1 sec per year) presumably there is a > probability (e.g. 1 in a million) that there is a crystal than can keep > that time based on my wrist temperature and various other watch wearing > habits. > > Have I scored it lucky?? > > P.S. I have double checked and can guarantee you the watch hasn't picked > up a single LF time signal from anywhere! > > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
