[App_rpt-users] RTCM Simulcast question

[Joe Moskalski]

I mentioned this to someone else, QRP Labs has a kit that creates a OCXO
around the Si5351 chip. here is the link:

http://www.qrp-labs.com/ocxokit.html

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.

http://www.qrp-labs.com/progrock.html



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On Mon, Jun 6, 2016 at 11:36 AM, David McGough <kb4fxc at inttek.net> wrote:

>
> Hi Joe,
>
> While on the subject of the Si5351 chips, the application of converting
> one reference clock to a secondary frequency is what they were designed
> for. So, since you've already got a GPS reference, this -might- be an
> inexpensive starting point...For this application, you obviously won't
> need all the bells and whistles presented in this article! See:
>
> http://www.knology.net/~gmarcus/Si5351/Si5351_VFO_QEX.pdf
> http://www.knology.net/~gmarcus
>
> Note that I would replace the Si5351 25MHz reference with a decent TCXO
> (available on ebay, etc.)....Note that I haven't used the Si5351 with an
> RTCM, there may be simpler/better ways???
>
>
> 73, David KB4FXC
>
>
>
>
> On Mon, 6 Jun 2016, Joe Moskalski wrote:
>
> > > It seems clear that in order for simulcast to work properly with the
> RTCM
> > > I will need to clock the CPU to the GPSDO. Is there a device available
> to
> > > give you the 9.6 mhz reference from the 10 mhz out from the GPSDO or
> does
> > > anyone have a schematic available so that I can build them myself?
> > >
> > >
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