LA3ZA used a UBLOX NEO-7 GPS unit to lock his K3.
This $20 unit including complete development board can be obtained here.
http://www.ebay.co.uk/itm/301199083821
It's tiny, has a patch antenna (although a $10 active antenna works
better) and consumes under 60ma.
It can be powered from +5v or a USB port. It fits in a 2"x3" box. Once
set up it is stand alone not requiring a computer connection.
There was some question as to whether the jitter of the unit would
disqualify it as a decent ref osc.
A posting on the SpectrumLab group indicated that it seems quite
adequate for K3 disciplining.
spectrumlabus...@yahoogroups.com
Accuracy within 0.02 to 0.03 Hz of a Rb standard.
Output spectrum seems to indicate that jitter is not a problem for this
purpose.
73 de Brian/K3KO
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