[TenTec] FS--N4YG DDS VFO Conversion Kit for Corsair II and Others--Brand New & Unused

[w8au at sssnet.com]

At 11:49 AM 7/9/2012, Jerry Haigwood wrote:
>     Steve hunt- G3TXQ, who is the original designer of the DDS VFO that Dave
>refers to, has made spectral purity measurements.  His design uses a five
>element low pass filter in the DDS output which helps with harmonics, etc.
>All DDS have spurs at different frequencies.  Most of these are way below
>the desired output. However, the filters in the Corsair II take care of any
>spurs that might cause a problem.  Steve has documented his design at
><http://www.karinya.net/g3txq/corsair_pto/>.
>     BTW, I am running the same DDS on my Corsair II.  I also have the 263G
>remote VFO which still has the original PTO and I can use it as a reference.

Thanks, Jerry:   I was thinking of phase noise when I asked about purity.
                        I realize that some birdies may show 
up.  (even with PTOs)
                        I'll check Steve's web site.

73,
Perry



>-----Original Message-----
>From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
>On Behalf Of w8au at sssnet.com
>Sent: Monday, July 09, 2012 2:03 AM
>To: Discussion of Ten-Tec Equipment
>Subject: Re: [TenTec] FS--N4YG DDS VFO Conversion Kit for Corsair II and
>Others--Brand New & Unused
>
>At 07:43 PM 7/8/2012, you wrote:
> >This past April I finished converting the PTO in my Corsair II to a DDS
> >VFO from the design of Steve-G3TXQ with great success. (I discussed my
> >project in a May 24th posting on this reflector.)
>
>Have you made TX spectral purity measurements before and after?
>
>Perry
>
>_______________________________________________
>TenTec mailing list
>TenTec at contesting.com
>http://lists.contesting.com/mailman/listinfo/tentec
>
>_______________________________________________
>TenTec mailing list
>TenTec at contesting.com
>http://lists.contesting.com/mailman/listinfo/tentec