There have been some Trimble Thunderbolts over on that auction site that were being sold for $80 each (not surplus Telcom ones). I grabbed two and they work.
My antenna was a "hockey puck" style antenna sitting on the window sash, facing South. 73, Dick, W1KSZ Sent from Outlook<http://aka.ms/weboutlook> ________________________________ From: time-nuts <[email protected]> on behalf of Grant Hodgson <[email protected]> Sent: Monday, February 4, 2019 11:15 AM To: [email protected] Subject: Re: [time-nuts] 10 mhz accuracy for a satellite system Paul The keyword is GPSDO - GPS disciplined oscillator. The vast majority of these will give a 10MHz output. The long term accuracy is the same as the GPS navigation system, which for most purposes is similar to that of national standards. GPSDOs are more stable than most rubidium standards in the long term, and GPSDOs are extremely common in most laboratories. The Trimble Thunderbolt is very common and available on the surplus market, as is the HP Z3801A. James Miller (G3RUH) used to sell an excellent GPSDO. There are other home-brew designs available if you want to build. These have all been extensively characterised if you want the details. If you want to buy new, then there are products such as the Fury and Firefly from Jackson Labs; , U-Blox have many offerings (not sure if they do a GPSDO though). Google GPSDO or GPS frequency standard, or check the leapsecond.com website for more information - there's loads out there, it's just a case of using the right term in the search engine. regards Grant > Date: Sun, 3 Feb 2019 23:43:10 -0000 > From: "Paul Bicknell" <[email protected]> > To: "'Discussion of precise time and frequency measurement'" > <[email protected]> > Subject: [time-nuts] 10 mhz accuracy for a satellite system > Message-ID: <D1F28D64EDD440EC834753538090F381@precision380> > Content-Type: text/plain; charset="iso-8859-1" > > > Dear all > I currently use a 198 Khz off air standard but I can no longer use 600 khz > since it moved from Rugby > I have herd a lot about varies frequency references that use satellites > This technology has improved immensely & become more affordable over the > past 5 years > > So can a standard locked to a satellite be as good as a Rubidium ? > > What accuracy can I achieve for a satellite system below ?800 as I am not > familiar with the latest that are on offer? > > Regards Paul Bicknell South Coast UK > > _______________________________________________ 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.
