[TCML] winding direction

[Lau, Gary]

Whether the core is air or iron is irrelevant.  The pertinent thing is that with the NST, there were two halves to the secondary which are wired in series.  If one half is wound in the opposite sense to the other, the net result is that they cancel rather than add.  With a Tesla coil, there is (usually) only one secondary, and its phase relative to the primary doesn't matter at all.

Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces at pupman.com [mailto:tesla-bounces at pupman.com] On
> Behalf Of bartb
> Sent: Wednesday, May 21, 2008 9:20 PM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] winding direction
>
> True for an iron core transformer. Not so much for a TC. To compare, you
> really need two identical secondaries wound in opposite directions and
> compare. I seem to remember someone on the list did this years ago and
> found no difference. I would bet that most secondary and primary winding
> directions are dictated by the coiler (is he/she left or right handed).
>
> I am right handed. I wind coils on a motor drive with secondary
> horizontal. I wind left to right with the wire guided over the top. Can
> you guess my sec winding direction? My primaries are flat and wound
> clockwise looking down on them.
>
> Well, in the end, both coils are opposing and they still works great!
>
> Take care,
> Bart
>
> douglas smith wrote:
> > when winding my secondary does it matter if i wind it in the same direction as
> primary
> >   probably stupid question but i was reading somewhere about a person that was
> >   taking a nst apart to increase ma. and it mentioned something about how
> >   he had to do it twice because when he reassembled it he did so as to put the
> >   windings in the same direction ????
> >   wondered if that applied to primary/secondary windings
> >   thanks
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