[TenTec] DDS PTO replacement for old Ten Tec rigs

Barry N1EU barry.n1eu at gmail.com
Fri Oct 27 12:52:13 EDT 2017

Yes, that's what I was alluding to in my previous post.  The LO spectral
purity will go from very clean/excellent to not-so-clean/fair with the
DDS.  If you get the chance, have a look at one of the DDS converted rigs
tx spectrum on an SDR rx panadapter/spectrum analyzer.  And the spurs you
see will affect rx as well as tx.

Many folks will probably not be so concerned and will be motivated by the
improved convenience factor.

73, Barry N1EU

On Fri, Oct 27, 2017 at 12:10 PM, lstoskopf at cox.net lstoskopf at cox.net <
lstoskopf at cox.net> wrote:

> Just remember that TT went to great lengths to have pure LOs.  The Orion
> was a beast in making sure that the LO was as good as the time allowed.
> Wonder what engineers designed that.  Never have heard the story.  Don't
> expect some cheap DDS to do as well.  It would be fun to compare a well
> built analog VFO to cheaper DDS as far as clean signals are important.  Of
> course,  your application may not require extreme close in performance and
> you will be perfectly happy.  That's what this hobby is all about.  N0UU
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