Actually a couple of years ago I found that winding direction between the primary and secondary did make a significant difference in my little tabletop coil:
https://www.youtube.com/watch?v=GeUgUQIJTSA
As you can see by the video title and my discussion, I was blaming the quality of the copper at first.But then someone on this list asked me about winding direction, and I took another look:
The primary coil as you see in the above video is would clockwise (if you look down on it as if from a bird's eye view, also can be seen in the video how the topmost turn of the primary comes around from behind and then up and over - revealing the turn direction)
and as I then posted in this video, comparing the secondary coils side by sidehttps://www.youtube.com/watch?v=4IA0RZ8rPOgThe coil with the darker reddish color - the one on the right here, that performed very will with the clockwise wound primary, as you see, is wound counter-clockwise.
So this would lead me to think that having the primary coil winding direction _opposite_ the winding direction of the secondary gives the best results...or has anyone delved deeper into this in their own evidence based experiments?
----------------------------------
Brian Hall
> From: drieben@xxxxxxx
> Date: Sat, 28 Feb 2015 10:06:55 -0600
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] Primary and secondary winding direction (CW or CCW)?
>
> No, it does not matter which way you wind the secondary in relation to the primary coil.
>
> David
>
> Sent from my iPhone
>
> > On Feb 27, 2015, at 4:20 PM, Timothy Gilmore <tdg8934@xxxxxxxxx> wrote:
> >
> > I have my 4 comb strips to hold my primary coil tube. I haven't been able
> > to tell 100% which direction to start winding either clockwise or
> > counter-clockwise.
> >
> > Does it matter or do both the primary and secondary windings have to match
> > (i.e. both CW or both CCW)? What if they are not in the same direction?
> >
> > I haven't gotten my secondary winding started yet as I may purchase one. I
> > don't want to start my primary and find out I have it in the wrong
> > direction.
> >
> > Thoughts?
> >
> > Thanks,
> >
> > Tim
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