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David Fainitski, Do you happen to remember where you found the original code from Alex?R2AUK. I've been looking all around and so far no luck. I found his github here https://github.com/afiskon/ but

Very cool! ?Very promising results! That sounds like it would be mostly just software at that point then! ?(Though I guess there’s more to do there than I thought, you’d probably want to not

I cross posted some of my results. So I thought I'd post how far I've got. This is the front end signal conditioning, going into a 74AC74 (Schmitt trigger inverter) that is used to clean the signal

I've got the basics working. ?Just doing spice sims to work out some component values. ?Basically the 74AC14 at the front end needs a 1V...4V signal. ?Over the whole frequency range, from

Oooo, the ATU100 has the capability of measuring frequency??? It sounds like it might take significant development work, but adding stored tuning information to make later tuning instant on the same

Just been looking at the tune2.c, and seen the LRU list. While looking at the LDG and MFJ relay patterns I see several repeats, given that the code tracks the best found so far, there seems no point

Hi, I've been looking at adding frequency monitoring to the ATU-100 HW.? I have it mainly working (current front end gain is wrong above about 24MHz), so need to tweak some of the network values to

Chris, my tuning algorithm isn’t too different than the article you referenced, but I think you will find that the tuning algorithm in the article results in a lot more switches to find a solution.

Could be either.? I used the code in tune2.c to replace the tune() routine in the ATU100 3.2 firmware

Is the Github code pointed to for the ATU-100 or ATU-10? Seems to be? a conflict here, nATU-100 in the post and ATU-10 at Github. glenn

Correct, there is only one "ideal" matching point. The problem is finding it. The article I referenced was for an L-type tuner. The article also had a design of a search algorithm which is worth, at

I converted my ATU100 firmware 3.2 to use Tom Court's latest algorithm that is available from https://github.com/tomcourt/tunetest see tune2.c and tried it on my usually problematic doublet antenna.?

So here is an update. HW changes: Used a 74AC14 as the front end, with a 74HC393 after. ?Tried various divides and div 4 works well (and needs least time). I've move the SW FET input from pin 11 to

I was a little surprised when you put the code built code out there to try. The algorithm was really just a first iteration at it was only about 20% improved over the existing algorith. I've got a

Hi Elijah, I assume you have adjusted the potentiometer to get the correct FWD power reading. Ideally you need to make sure that the pots for FWD and RVS are set correctly (same values) for the SWR

Ok I had to do some adjustment and I now have the power reading spot on…but the SWR value is off. I’m going to go ahead and replace the diodes since I have them and keep tinkering for a bit and

Yes Elijah, it is correct, as described in the manual. --- Cu ganduri bune, Marius - YO6RK senty.ro 73!

Thanks for the input Markus. I’m confused with the input into EPPROM. If I’m at 1:20, the input should be 20 correct in cell 31?

Hi, Tom Your algorithm has the disadvantage of unconditional 73 point checks. This causes SWR goes to very large value and a TRX reduces a power to almost zero. If you wanna build really practically

Hi. In a separate topic, I raised the issue of the correct adjustment of RV1 and RV2 on the PCB, but no one has answered yet, and I don't expect anyone to answer either... anyway, I was just asking