<div dir="ltr"><div>I mentioned this to someone else, QRP Labs has a kit that creates a OCXO around the Si5351 chip. here is the link:<br><br><a href="http://www.qrp-labs.com/ocxokit.html">http://www.qrp-labs.com/ocxokit.html</a><br><br></div>If you couple this with another kit of theirs you can program it it any frequency you want. My only thought is would it be accurate/stable enough. <br><br><a href="http://www.qrp-labs.com/progrock.html">http://www.qrp-labs.com/progrock.html</a><br><br><br></div><div id="DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br>
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</table><a href="#DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width="1" height="1"></a></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jun 6, 2016 at 11:36 AM, David McGough <span dir="ltr"><<a href="mailto:kb4fxc@inttek.net" target="_blank">kb4fxc@inttek.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
Hi Joe,<br>
<br>
While on the subject of the Si5351 chips, the application of converting<br>
one reference clock to a secondary frequency is what they were designed<br>
for. So, since you've already got a GPS reference, this -might- be an<br>
inexpensive starting point...For this application, you obviously won't<br>
need all the bells and whistles presented in this article! See:<br>
<br>
<a href="http://www.knology.net/~gmarcus/Si5351/Si5351_VFO_QEX.pdf" rel="noreferrer" target="_blank">http://www.knology.net/~gmarcus/Si5351/Si5351_VFO_QEX.pdf</a><br>
<a href="http://www.knology.net/~gmarcus" rel="noreferrer" target="_blank">http://www.knology.net/~gmarcus</a><br>
<br>
Note that I would replace the Si5351 25MHz reference with a decent TCXO<br>
(available on ebay, etc.)....Note that I haven't used the Si5351 with an<br>
RTCM, there may be simpler/better ways???<br>
<br>
<br>
73, David KB4FXC<br>
<span class=""><br>
<br>
<br>
<br>
On Mon, 6 Jun 2016, Joe Moskalski wrote:<br>
<br>
> > It seems clear that in order for simulcast to work properly with the RTCM<br>
> > I will need to clock the CPU to the GPSDO. Is there a device available to<br>
> > give you the 9.6 mhz reference from the 10 mhz out from the GPSDO or does<br>
> > anyone have a schematic available so that I can build them myself?<br>
> ><br>
> ><br>
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