G'day time nut friends I wonder if one of you could point me in the right direction on how to purchase (if one exists) a Time Signal Transmitter for use at the local level (range 20m) for synchronising watches and radio clocks using the various standard radio frequencies? And for the transmitter itself to receive / synchronise it's time using NTP? I am in Australia and we are out of range for the normal transmissions... Kind regards to you all Anthony Dunne Sydney, Australia

Hi I would check the local rules and regs before you put money into one of these gizmos. At least by the rules over here, this sort of thing might get you in trouble. Bob > On Jan 25, 2022, at 5:29 AM, Anthony Dunne <agdunne@hotmail.com> wrote: > > G'day time nut friends > > I wonder if one of you could point me in the right direction on how to purchase (if one exists) a Time Signal Transmitter for use at the local level (range 20m) for synchronising watches and radio clocks using the various standard radio frequencies? > > And for the transmitter itself to receive / synchronise it's time using NTP? > > I am in Australia and we are out of range for the normal transmissions... > > > Kind regards to you all > > > Anthony Dunne > > Sydney, Australia > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.

On 1/25/22 2:29 AM, Anthony Dunne wrote: > G'day time nut friends > > I wonder if one of you could point me in the right direction on how to > purchase (if one exists) a Time Signal Transmitter for use at the > local level (range 20m) for synchronising watches and radio clocks > using the various standard radio frequencies? > > And for the transmitter itself to receive / synchronise it's time > using NTP? > > I am in Australia and we are out of range for the normal transmissions... > > > Kind regards to you all > > > Anthony Dunne > > Sydney, Australia This has been discussed on the list.  The trick is to use Google and "site:febo.com WWVB Transmitter" (or similar..) I found this thread which you can take a look at..  There's probably others, and some googling will find it. https://febo.com/pipermail/time-nuts_lists.febo.com/2018-August/093726.html

Erik Fair

Got a mobile phone with a speaker? There are "emulator" software apps which generate the appropriate time signals (e.g. 60 KHz WWVB) as harmonics of sounds emitted through mobile phone speakers: iPhone/iPad: ihttps://apps.apple.com/us/app/clock-wave/id1073576068 Android: https://play.google.com/store/apps/details?id=jp.houryo.wwvbemulator&hl=en_US Nota Bene: this is not something that will work within a 20m radius. Think more along the lines of 0.25m or less. Erik Fair

There was a discussion along these lines about using a RasberryPi or Arduino for this purpose a while ago on this forum --- try searhing for "WWVB Chronverter". However, as has been said you should check your local regulations. Dave

On 1/25/22 7:52 AM, Bob kb8tq wrote: > Hi > > I would check the local rules and regs before you put money > into one of these gizmos. At least by the rules over here, this > sort of thing might get you in trouble. Setting a watch 30 cm away would require *very* low power At 20m, you'd probably be risking setting your neighbors' clocks (unless you live in the middle of a huge tract of deserted land, of which there are many in Australia) > > Bob > >> On Jan 25, 2022, at 5:29 AM, Anthony Dunne <agdunne@hotmail.com> wrote: >> >> G'day time nut friends >> >> I wonder if one of you could point me in the right direction on how to purchase (if one exists) a Time Signal Transmitter for use at the local level (range 20m) for synchronising watches and radio clocks using the various standard radio frequencies? >> >> And for the transmitter itself to receive / synchronise it's time using NTP? >> >> I am in Australia and we are out of range for the normal transmissions... >> >> >> Kind regards to you all >> >> >> Anthony Dunne >> >> Sydney, Australia >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com >> To unsubscribe, go to and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there. >

Hi It’s not clear that the regs in Australia would care about doing this in an area not covered by this or that time signal. I don’t know *what* they do or don’t say. My only concern is that we all stay out of jail :) Bob > On Jan 25, 2022, at 12:21 PM, Lux, Jim <jim@luxfamily.com> wrote: > > On 1/25/22 7:52 AM, Bob kb8tq wrote: >> Hi >> >> I would check the local rules and regs before you put money >> into one of these gizmos. At least by the rules over here, this >> sort of thing might get you in trouble. > > Setting a watch 30 cm away would require *very* low power > > At 20m, you'd probably be risking setting your neighbors' clocks (unless you live in the middle of a huge tract of deserted land, of which there are many in Australia) > > >> >> Bob >> >>> On Jan 25, 2022, at 5:29 AM, Anthony Dunne <agdunne@hotmail.com> wrote: >>> >>> G'day time nut friends >>> >>> I wonder if one of you could point me in the right direction on how to purchase (if one exists) a Time Signal Transmitter for use at the local level (range 20m) for synchronising watches and radio clocks using the various standard radio frequencies? >>> >>> And for the transmitter itself to receive / synchronise it's time using NTP? >>> >>> I am in Australia and we are out of range for the normal transmissions... >>> >>> >>> Kind regards to you all >>> >>> >>> Anthony Dunne >>> >>> Sydney, Australia >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com >>> To unsubscribe, go to and follow the instructions there. >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com >> To unsubscribe, go to and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.

On 1/25/22 9:29 AM, Bob kb8tq wrote: > Hi > > It’s not clear that the regs in Australia would care about > doing this in an area not covered by this or that time signal. > I don’t know *what* they do or don’t say. My only concern > is that we all stay out of jail :) > > Bob For test purposes, an improvised "screen box" of sheet steel might be a decent approach. I like the "harmonics from the speaker" scheme.  I'm not sure that would work with the new PSK modulation, though. And yes, checking the rules is nice.  A post with perp-walk footage of a time-nut would not be a "a good thing".

Would a loop surrounding the watch (like an induction loop system for hearing aids) help keep the radiation lower ? On Tue, Jan 25, 2022 at 6:14 PM Bob kb8tq <kb8tq@n1k.org> wrote: > Hi > > It’s not clear that the regs in Australia would care about > doing this in an area not covered by this or that time signal. > I don’t know *what* they do or don’t say. My only concern > is that we all stay out of jail :) > > Bob > > > On Jan 25, 2022, at 12:21 PM, Lux, Jim <jim@luxfamily.com> wrote: > > > > On 1/25/22 7:52 AM, Bob kb8tq wrote: > >> Hi > >> > >> I would check the local rules and regs before you put money > >> into one of these gizmos. At least by the rules over here, this > >> sort of thing might get you in trouble. > > > > Setting a watch 30 cm away would require *very* low power > > > > At 20m, you'd probably be risking setting your neighbors' clocks (unless > you live in the middle of a huge tract of deserted land, of which there are > many in Australia) > > > > > >> > >> Bob > >> > >>> On Jan 25, 2022, at 5:29 AM, Anthony Dunne <agdunne@hotmail.com> > wrote: > >>> > >>> G'day time nut friends > >>> > >>> I wonder if one of you could point me in the right direction on how to > purchase (if one exists) a Time Signal Transmitter for use at the local > level (range 20m) for synchronising watches and radio clocks using the > various standard radio frequencies? > >>> > >>> And for the transmitter itself to receive / synchronise it's time > using NTP? > >>> > >>> I am in Australia and we are out of range for the normal > transmissions... > >>> > >>> > >>> Kind regards to you all > >>> > >>> > >>> Anthony Dunne > >>> > >>> Sydney, Australia > >>> > >>> _______________________________________________ > >>> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send an email to time-nuts-leave@lists.febo.com > >>> To unsubscribe, go to and follow the instructions there. > >> _______________________________________________ > >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send an email to time-nuts-leave@lists.febo.com > >> To unsubscribe, go to and follow the instructions there. > >> > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send an email to time-nuts-leave@lists.febo.com > > To unsubscribe, go to and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.

Hi The original idea was a transmitter with a 20m range. The “check the regs” are aimed at that sort of setup. For something that is in contact with the clock or watch, indeed very low power could be used. Normal coil based radiators would make sense. It’s not clear just how practical wiring all that up with devices scattered over an area with a diameter of 40 meters. Bob > On Jan 25, 2022, at 1:19 PM, Adrian Godwin <artgodwin@gmail.com> wrote: > > Would a loop surrounding the watch (like an induction loop system for > hearing aids) help keep the radiation lower ? > > On Tue, Jan 25, 2022 at 6:14 PM Bob kb8tq <kb8tq@n1k.org> wrote: > >> Hi >> >> It’s not clear that the regs in Australia would care about >> doing this in an area not covered by this or that time signal. >> I don’t know *what* they do or don’t say. My only concern >> is that we all stay out of jail :) >> >> Bob >> >>> On Jan 25, 2022, at 12:21 PM, Lux, Jim <jim@luxfamily.com> wrote: >>> >>> On 1/25/22 7:52 AM, Bob kb8tq wrote: >>>> Hi >>>> >>>> I would check the local rules and regs before you put money >>>> into one of these gizmos. At least by the rules over here, this >>>> sort of thing might get you in trouble. >>> >>> Setting a watch 30 cm away would require *very* low power >>> >>> At 20m, you'd probably be risking setting your neighbors' clocks (unless >> you live in the middle of a huge tract of deserted land, of which there are >> many in Australia) >>> >>> >>>> >>>> Bob >>>> >>>>> On Jan 25, 2022, at 5:29 AM, Anthony Dunne <agdunne@hotmail.com> >> wrote: >>>>> >>>>> G'day time nut friends >>>>> >>>>> I wonder if one of you could point me in the right direction on how to >> purchase (if one exists) a Time Signal Transmitter for use at the local >> level (range 20m) for synchronising watches and radio clocks using the >> various standard radio frequencies? >>>>> >>>>> And for the transmitter itself to receive / synchronise it's time >> using NTP? >>>>> >>>>> I am in Australia and we are out of range for the normal >> transmissions... >>>>> >>>>> >>>>> Kind regards to you all >>>>> >>>>> >>>>> Anthony Dunne >>>>> >>>>> Sydney, Australia >>>>> >>>>> _______________________________________________ >>>>> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe >> send an email to time-nuts-leave@lists.febo.com >>>>> To unsubscribe, go to and follow the instructions there. >>>> _______________________________________________ >>>> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe >> send an email to time-nuts-leave@lists.febo.com >>>> To unsubscribe, go to and follow the instructions there. >>>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe >> send an email to time-nuts-leave@lists.febo.com >>> To unsubscribe, go to and follow the instructions there. >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send >> an email to time-nuts-leave@lists.febo.com >> To unsubscribe, go to and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.