Hello All, Are there any design details someplace regarding these massive antennas?
Thanks, John AJ6BC On Thu, Oct 8, 2020, 19:27 paul swed <[email protected]> wrote: > Hello to the group. > Ray as Bob mentions you are taking a 10s of uv signal to a logic level of > maybe 4V. > If the loop is any place close to the divided down signal, it will > oscillate. It would take incredible shielding to protect the receiver. > Thats why you often see a solution that doubles to 120 KHz and modifies the > detectors to work at that frequency. That means hacking the radio > internally. Not fun. The other really annoy effect is that the doubling > slips phace due to noise and propagation. So if charting suddenly you get a > 180 degree flip. Thats messy. > The doubling solution can work. Search for carter and there are several > others. > But having tested and used all of the alternates and lots more on the east > coast decided they were too much trouble. You should see the box of boards > I have chuckle. > For me I am very happy with the d-psk-r. Though in being above board I > designed version 1 and Rodger and I did version 2. Its solid and no mods to > any receiver. Everything has always been released to the time-nuts group. > As they say have fun. > Regards > Paul. > WB8TSL > > On Thu, Oct 8, 2020 at 5:39 PM <[email protected]> wrote: > > > Bob, > > > > I am using a ferrite rod antenna for the receiver. No outside antenna. > > > > Ray > > > > -------- Original Message -------- > > Subject: Re: [time-nuts] WWVB Dephaser Question > > From: Bob kb8tq <[email protected]> > > Date: Thu, October 08, 2020 12:40 pm > > To: Discussion of precise time and frequency measurement > > <[email protected]> > > > > Hi > > > > A lot depends on your antenna setup. You can also swamp out the incoming > > WWVB signal……. > > > > Bob > > > > > On Oct 8, 2020, at 2:07 PM, <[email protected]> < > > [email protected]> wrote: > > > > > > I have read several different articles where the WWVB phase shift is > > > eliminated by doubling the signal to 120 kHz. Several members of the > > > list have built these units. > > > > > > Assume I build a circuit to double the incoming signal and use a > schmitt > > > trigger to get a 120 kHz square wave. If I then divide that signal back > > > down to 60 kHz will that signal be strong enough to swamp out the WWVB > > > signal? I'm guessing it will be since it is at the 5 volt level and > > > somewhere in the +25 dBm or greater range. > > > > > > Ray, > > > AB7HE > > > > > > _______________________________________________ > > > time-nuts mailing list -- [email protected] > > > To unsubscribe, go to > > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > > and follow the instructions there. > > > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
