Curt.....it’s $100, but has RIT, AND a display.....just another idea that I
pondered myself:
http://www.pongrance.com/DDS2016.html
Greg, KC8HXO
>
> On Oct 25, 2017 at 20:47, <Curt Benjamin via TenTec
> (mailto:tentec@contesting.com)> wrote:
>
>
>
> Guys, since the N4YG DDS is no longer available and too expensive anyway, I
> have been exploring the idea of making my own. So far, I've taken the Arduino
> code to control one of those $8 AD9850 DDS modules from China to tune from 5
> to 5.5MHz but I haven't found a way to add an RIT line to it. What I'm
> thinking might work is making something like a 2MHz xtal oscillator with a
> voltage-controlled shift line using a varactor and mixing that with the
> Arduino/AD9850 DDS that tunes from 3 to 3.5 MHz instead. I don't think any of
> these frequencies would pose any problems in either the DC receiver in the
> C21/22 or in any of the superhets of the other various models but I'm not
> sure. What do you folks think? Is that a good scheme or should I change the
> frequencies. I picked 2MHz because it's available in a off-the-shelf crystal.
> Thanks. Curt, K8AI _______________________________________________ TenTec
> mailing list TenTec@contesting.com
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>
>
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