Andy agreed I wrote about the requirements for stability when I built mine up. I did not need to add a amplifier I simply attenuated the output of the tristate gate to get to the 1000uv level then filtered and split to 6 outputs. One drives the antenna the others drive coax's to truetime and symetricom clocks. They really look nice. Silly but what the heck. I agree if I need more power a FET stage is the way to go. Just don't so far. Hmmm maybe mid next year I can build a 100 watt amp to cover our town. Not really. The antenna would be quite a challenge. But I hear I can pick a few towers up for shipping costs real soon now. Even with matching networks. Regards Paul WB8TSL
On Sat, Oct 27, 2018 at 8:55 PM Andy Backus <[email protected]> wrote: > I should have credited the loop idea as you did, Paul. I don't know who > it was, but thank you. > > > I would leave my translator on all the time if it weren't for my La Crosse > -- whose reception would be ruined. > > > In my system, BTW, a resonant tank precedes a FET amplifier, which > provides the antenna current. I have found, as others have, that the > frequency must be good to several Hertz. So I use a crystal controlled > CMOS gate oscillator to generate the RF. > > > Andy Backus > > WA2TND > > > ________________________________ > From: time-nuts <[email protected]> on behalf of paul swed > <[email protected]> > Sent: Saturday, October 27, 2018 4:01 PM > To: Time-nuts > Subject: Re: [time-nuts] WWVB Translation > > Andy pretty much what I did also. A loop in the basement as suggested by a > time-nut. > Radiations quite low depending on the floor of the house and walls its > 100uv to 30 uv. > Did resonate it with a cap that seemed to improve things. But no matter it > works for what I need and the clocks are happy. > I leave the simulator on all of the time now as no matter the time of the > day or battery change the clocks lock in the 3 or so minutes. > Since I don't own an official lacrosse no issue here though perhaps mid > January I will pick one up cheap... Chuckle. > If I do I guess l'll have to build a BPSK version. Oh hang on there thats > what the de-psk-r is. Just add 60 KHz. Actually depending on the clocks > cost as they get dropped maybe not a bad idea. Have fun with your system. > Regards > Paul > WB8TSL > > On Sat, Oct 27, 2018 at 6:04 PM Andy Backus <[email protected]> wrote: > > > For those still interested in GPS to WWVB simulation -- after trying a > few > > antenna designs I found that a 50-foot loop of #26 enameled wire stapled > to > > the rafters in the basement works quite well. Putting 35 ma (rms) of 60 > > kHz WWVB signal through it lights up the house quite nicely. I don't > know > > yet if it also lights up the neighbor's house. I think I will > investigate > > that question when (and if) they pull the plug in Colorado. But I am > > prepared. > > > > > > Not so much for my La Crosse Technology WWVB BPSK clock. I think it will > > get swamped out. Can't have everything, I guess. > > > > > > Andy Backus > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > time-nuts Info Page - lists.febo.com< > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com> > lists.febo.com > time-nuts is a low volume, high SNR list for the discussion of precise > time and frequency measurement and related topics. To see the collection of > prior postings to the list, visit the time-nuts Archives.. Using time-nuts > > > > > 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.
