[time-nuts] 10MHz Rubidium reference source for frequency

Ryan Stasel rstasel at uoregon.edu
Mon Oct 27 12:10:16 EDT 2014


I’m curious how you have the PLL set up for the 5680 and GPS. Do you have any schematics, docs, etc?

I’m currently building a GPSDO based on James Miller’s design, and have a separate box with a 5680 in it (also grabbed from eBay for $40, since it “wouldn’t lock”, which was a simple fix).


-Ryan Stasel

> On Oct 26, 2014, at 6:51 PM, Chris Albertson <albertson.chris at gmail.com> wrote:
> On Sun, Oct 26, 2014 at 2:05 PM, Karen Tadevosyan <ra3apw at mail.ru> wrote:
>> I hope to use homemade GPSDO for the rubidium oscillator calibration.
> You can save a little if you build a "GPS disciplined Rb".  It is just like
> building a GPSDO but you use the Rb in place of the OCXO.  Saves money and
> I think gives better results because you do not have to transfer frequency
> from the crystal to the Rb.  Unless you need the OCXO for some other reason.
> I was luck to have bought the FE5680 back when they were $35 each.  They
> work well enough for my 10 digit frequency counter.
> -- 
> Chris Albertson
> Redondo Beach, California
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