Re: Tesla Coil Formula

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: m.j.watts@xxxxxxxxxxxx 

On 14 Dec 2005, at 6:41, Tesla list wrote:

> Original poster: mecortner@xxxxxxxxxx
>
> Hi Jared,
>
> I don't mean to change the subject of this thread but
> I've noticed that you seem to have quite a bit of
> knowledge of different winding types. I wanted to ask
> this question to the list but wasn't sure if anyone
> would know what I was talking about. I've been curious
> lately about bifilar windings. I read a website sometime
> ago stating that this topology would create a greater
> magnetic flux than a single winding. So I did a little
> experiment, I wound two identical nails with two hundred
> turns each of #28, one in the bifilar arrangement and the
> other just a single winding. I applied 12V to each one
> and noted how many paper clips each one would lift.
> And as far as I could tell they were identical. Is there
> some other quality that I'm over looking? Or did I
> do this experiment wrong? The site said that the bifilar
> coils were better for motor windings and such, do you
> know anything about this? Any input would be helpful.
>
> Thanks.
>
> ---- Matt Cortner ----

Bifilar windings and connecting them in parallel is much the same
as using a single winding with thicker wire. n-filar winding is often
used  in high frequency transformers  to improve the coupling
between separate windings.

Malcolm