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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

hi Elijah, for correcting the display, look for the cells 7 and 8 on EEPROM. Try setting both to 0 (zero)... that may solve this issue. 73, Immo

can nobody id what type of coupler is in the pics i posted?,it is from an old avair 1000 swr meter that had an open meter movement,the coupler is from 1.8-150 megs,the uhf is a seperate item.

Hello Geoff and others. I successfully erased the protected chip and uploaded the new firmware with some corrections. It took me a while and numerous times of trial and error…but it at least turns

I've developed an extensive test framework for comparing both how fast and how well algorithms perform using a simulated matching circuit. I've commented the code for my newest algorithm to some

Hi Singleshare, I've just joined this group and your message solved my problem with an ATU-130 (similar to the ATU-100) that wasn't tuning. However, in my case it was operator error. I had plugged

Hi, Chris, I don't think the Г shaped matching has multiple minimum SWR combinations. I think there is only one in ideal condition.

A word of caution. One can find the fastest match or one can find the best match. I suspect the two are not the same. It is possible for a tuner to have multiple combinations of L and C where a low

Thanks David Regards

Yes , the Chinese clone is a little bit better then original , so 3.5.

Dear all, I was thinking to buy a pickit3 and looking for it i've seen the pickit 3.5. I have not find info about it and my doubt is, Is the pickit3.5 compatible with the AT100 as the pickit3? Thks