[time-nuts] GPS for Nixie Clock

Bob Stewart bob at evoria.net
Mon Jul 11 14:59:17 EDT 2016

I see some LEA-6T units and some NEO-M8N units.  Has anyone done any timing tests on these since they came up last time on time-nuts?  The prices just seem to be way on the low side.



      From: Mark Sims <holrum at hotmail.com>
 To: "time-nuts at febo.com" <time-nuts at febo.com> 
 Sent: Monday, July 11, 2016 10:49 AM
 Subject: [time-nuts] GPS for Nixie Clock
One thing to consider about using a module with a built-in ceramic patch antenna is that usually the antenna cannot be removed and the modules have no support for an external antenna.  If you do have problems getting a signal it can be very difficult to add an external antenna.  You might want to try moving one around the house and seeing how well it works.  It usually takes an indoor GPS a while to acquire lock to the GPS satellites.

If you want a time-nutty-ish GPS receiver,  search Ebay for "Ublox LEA6T".  There are some units available from China that have one (plus a ceramic antenna) in them for a decent price ($30).  Normally an LEA-6T GPS receiver is over $100...  But to get the full benefit of a GPS timing receiver requires quite a bit of configuration and setup.  

Another receiver worth looking into is one from the Ublox 8 series.  They can track and work with GPS, Glonass, Beidou, and other nav systems.  Mine is currently tracking 25 satellites (GPS/GLONASS/SBAS) with an indoor antenna.  It cost around $25 and came with a removable antenna.  It has two programmable PPS outputs (only one is brought out to the connector)... you can set one to 10 KHz.                         
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