Agree with the conversation. With respect to neighbors when the day comes they may ask you to boost your signal. :-) Granted maybe the day won't come but at least having your local clocks work is nice. Regards Paul WB8TSL
On Sat, Aug 25, 2018 at 10:29 PM, Dana Whitlow <k8yumdoo...@gmail.com> wrote: > With the watch being physically close to the faux WWVB "transmitter", one > is in > the so-called "near field" regime, where the field strength (V/m) falls as > the inverse > cube of the distance. If one is putting the watch, say, within a few > inches of the > transmitter, reliable reception should be available yet the signal should > be literally > undetectable by any practical receiving device more than a few feet away. > Hence, > meeting the FCC field strength limit should be trivial.if the device is > used as pictured. > However, if one cranks up the power enough to reliably cover one's entire > house, > then there might be a problem depending how close the nearest neighbor > lives, > even at levels well within the FCC limit he quotes. > > Taking the near field relationship in hand, 40 uV/m at 300m would translate > into > a whopping 0.135 V/m at 20 meters range, more than enough to feed most > peoples' > entire house. So the pragmatic issue would again be- neighbors. On the > other > hand, most of them would never be aware of the local signal as long as they > get good > time settings, unless they live close enough to Ft. Collins for the two > signals to > contend with each other. > > It looks to me like the ferrite rod antenna is considerable overkill. Even > with no > purposeful antenna I'd expect leakage to yield sufficient signal for at > least a few > inches. > > Dana > > > On Sat, Aug 25, 2018 at 8:11 PM Wayne Holder <wayne.hol...@gmail.com> > wrote: > > > This guy has what looks like a well thought out design using a Sirf-Based > > GPS and ATTiny44A chip to generate a signal to update his watch: > > > > https://www.anishathalye.com/2016/12/26/micro-wwvb/ > > > > Unfortunately, he doesn't seem to have published a schematic or his > source > > code. But, he covers enough detail that I think it wouldn't be too hard > to > > replicate what he's done. Or, perhaps he would disclose these details if > > contacted. > > > > Wayne > > > > On Sat, Aug 25, 2018 at 4:33 AM, D. Resor <organli...@pacbell.net> > wrote: > > > > > I thought I would search in a different way for a WWVB signal generator > > > design. I found this item. While the designer explains it isn't as > > > accurate as WWVB it may be another starting point. > > > > > > http://www.tauntek.com/wwvbgen-low-cost-wwvb-time-signal-generator.htm > > > > > > > > > > > > Donald R. Resor Jr. T. W. & T. C. Svc. Co. > > > http://hammondorganservice.com > > > Hammond USA warranty service > > > "Most people don't have a sense of humor. They think they do, but they > > > don't." --Jonathan Winters > > > > > > _______________________________________________ > > > time-nuts mailing list -- time-nuts@lists.febo.com > > > To unsubscribe, go to http://lists.febo.com/mailman/ > > > listinfo/time-nuts_lists.febo.com > > > and follow the instructions there. > > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe, go to > > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to http://lists.febo.com/mailman/ > listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.