[TenTec] DDS PTO replacement for old Ten Tec rigs

Mike Bryce prosolar at sssnet.com
Sun Oct 29 20:12:26 EDT 2017

Curt and the group,

Nope, the 104 did not have a RIT. Heathkit relied on the external VFO to function as a rec only RIT.

The only problem I have is the lack of gray matter when it comes to writing the sketch for the Nano.

Mike, WB8VGE
SunLight Energy Systems
The Heathkit Shop
J e e p

> On Oct 29, 2017, at 3:47 PM, Curt Benjamin via TenTec <tentec at contesting.com> wrote:
> Thanks Steve but that's the code that I was talking about. I already have AD7C's code modified to tune 5 to 5.5 MHz, I just need it to shift frequency slightly with a DC voltage for RIT. AD7C , himself was one who said he tried to map an analog input on the Arduino to a frequency shift and didn't like it because he said it wasn't smooth enough to use for RIT. That's why I'm trying to do it this way - to mix a VXO with the DDS in order to get a RIT line.
> I can post the code I have so far right here, if that's okay with the moderators. Also, where's a good place to post pics and schematics so folks here can access them?
> Also, Mike... If that's all you need... a DDS that has an input line that applies a shift in frequency, then code like the modified AD7C code would work. Are you sure there's not a voltage-controlled RIT line needed in the SB-104?
> Curt K8AI
> http://lists.contesting.com/mailman/listinfo/tentec

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