How can you tell that your GPSDO consistently beats the TBolt? On Fri, Dec 30, 2011 at 5:58 AM, Mark Spencer <mspencer12...@yahoo.ca>wrote:
> Yes that is correct. I have one of the units made by James Miller G3RUH. > I had hoped to build some something along these lines on my own, but the > Jupiter gps modules I acquired didn't actually have a 10 kHz output. Also > my comment re the adev is for the 10 MHz output. I've never looked at the > one pps output. > > > Sent from my iPad > > On 2011-12-29, at 8:45 PM, "Richard W. Solomon" <w1...@earthlink.net> > wrote: > > > I think you are talking about the G3RUH/N1JEZ design. I have built three > of them > > and they work very well. > > > > 73 es HNY, Dick, W1KSZ > > > > > > -----Original Message----- > >> From: Mark Spencer <mspencer12...@yahoo.ca> > >> Sent: Dec 29, 2011 9:24 PM > >> To: Discussion of precise time and frequency measurement < > time-nuts@febo.com> > >> Subject: Re: [time-nuts] Thunderbolt? (re simple gpsdo.) > >> > >> One of the designs using the 10 kHz output from a Jupiter gps engine > and a simple PLL to discipline an ocxo might be good starting point if > suitable gps engines are still available. There won't be much to tweak but > the performance could be quite good. > >> > >> My first gpsdo was a manufactured version of this concept and it > consistently beats my thunder bolt from an adev perspective and there is > nothing to tweak (: > >> > >> > >> > >> Sent from my iPad > >> > >> On 2011-12-29, at 6:35 PM, Chris Albertson <albertson.ch...@gmail.com> > wrote: > >> > >>>> The era of cheap Thunderbolts appears to be history. > >>>> > >>> > >>> What is the simplest GPSDO you can build? There are many designs > >>> around but when the T-Bolts came out I think people lost interesting > >>> building. > >>> > >>> I think something very simple could work. If your local oscillator is > >>> at all decent it will not loose or gain full cycle in one second. So > >>> I think you only need to compare the phase of the oscillator and the > >>> PPS. Would an analog controller work? I do software all day every > >>> day at work so it would be fun to build an analog computer for a > >>> change. > >>> > >>> > >>> Chris Albertson > >>> Redondo Beach, California > >>> > >>> _______________________________________________ > >>> time-nuts mailing list -- time-nuts@febo.com > >>> To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >>> and follow the instructions there. > >> > >> _______________________________________________ > >> time-nuts mailing list -- time-nuts@febo.com > >> To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > > > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
