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For the air cores, I think it doesn’t matter. For the tandem core, I don’t know. For the big ones, I think they are all clockwise.

Look at the board and think about it a while...

Does not matter for a single winding, for multiple windings ON THE SAME CORE wind them all in the same direction.

ONLY the turns that pass through the toroid count. An example, take a piece of straight wire and pass it through the toroid, , that is one turn, if you bend the wire so that the left hand side of the

TIL: toroids can be wound clockwise or counterclockwise. eek… had no idea... In which direction are the toroids on the ATU-100 to be wound?

This explains it clearly, and has a picture at the bottom showing 20 wraps: https://www.kitsandparts.com/howtowindtoroidswithoutpain.php Joe

If you stop and think about it for a while it will become apparent that for every pass through the core, while the winding is incomplete, there will be one pass over the core - except on the last pass

I'm no expert, but my understanding is that you count the wire as it passes over the toroid. The ADX-UNO project has an instructional PDF with photos, and that is how they count them there. If I'm

i am talking about the end of the wind where it passes thru the hole from the opposit side of the core and say gets soldered in the pcb,so for example if i have a core with 20 turns do i count 22 on

through the middle... the hole ... OK ?

just a quick question,if on a torroid the start of the winding say passes from left to right,does that first pass count as 1 turn,ie before it passes over the top of the core,a sort of half turn?.

No worries, Dave

got that wrong folks it was David Browne 2E0DMB who helped me,sorry about that,having a senior moment! 73.

???

Its quite straight forward, Daniel. Here's what I do. Prepare a couple of RG59 (75R) centre signal wires with the insulation trimmed to act as the primary windings. This cable has a solid inner core

Hi Paul You got the wrong David It was me that helped you yesterday, David Browne 2E0DMB

if i remember i wound mine using each torroid hole as as individual torrent,cant remember if the windings were in the same direction tho,i actualy found that the easyest to wind!.73

just want to say a big thank you to David Fainitski? for spending a lot of time yesterday helping me with my pic that was write+ read protected,not sure why this was as it was a new untouched kit,not

Hi, all. I recently (November or December) bought an ATU-100 kit. ?I can solder any of it, no problem, but I am terrible at winding toroids, and don't have the first idea about how to wind this

Well, after doing some reading and testing the programmer, I've come to the conclusion that the programmer is faulty. The Vdd pin appears to be constantly at 0.8V regardless of the power setting