RE: [TCML] Interesting Coil Wrap

[G Hunter <dogbrain_39560@xxxxxxxxx>]

I have to agree with Gary on this one.  I thought a bipolar secondary was wound just like any other secondary.  The two ends of a transformer secondary are already at opposite polarities--no need for "special" winding.

Besides, if you wind two halves of a solenoid-style inductor in opposite directions, won't the inductances cancel, leaving the thing with zero Henries?

I'm puzzled too.

Greg


--- On Sat, 8/2/08, Lau, Gary <Gary.Lau@xxxxxx> wrote:

> From: Lau, Gary <Gary.Lau@xxxxxx>
> Subject: RE: [TCML] Interesting Coil Wrap
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Date: Saturday, August 2, 2008, 8:23 PM
> I'm not sure if I'm exposing my ignorance or what,
> but I didn't think that bipolar secondaries were wound
> any differently than conventional ones, as far as each half
> being wound in a different direction.  Did I miss that?
> 
> Thanks, Gary Lau
> MA, USA
> 
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx
> [mailto:tesla-bounces@xxxxxxxxxx] On
> > Behalf Of David Rieben
> > Sent: Saturday, August 02, 2008 9:16 PM
> > To: Tesla Coil Mailing List
> > Subject: Re: [TCML] Interesting Coil Wrap
> >
> > Hi Ryan,
> >
> > Sounds an awful lot like a bi-polar coil ;^) Both ends
> of the
> > secondary coil are "hot" and neither end is
> grounded. They are
> > wound in opposite directions so that the two hot ends
> of the
> > secondary are 180 degrees out of phase and will spark
> towards
> > each other. This requires twice as much secondary wire
> as a
> > standard single-ended secondary coil but does have the
> ad-
> > vantage of not needing a dedicated RF ground.
> >
> > David
> >
> >
> >
> > ----- Original Message -----
> > From: "Ryan Carr"
> <goleafsgo_12@xxxxxxxxxxx>
> > To: <tesla@xxxxxxxxxx>
> > Sent: Saturday, August 02, 2008 10:47 AM
> > Subject: [TCML] Interesting Coil Wrap
> >
> >
> >
> > Hey Everybody, I recently saw a diagram on the
> internet of a person using a
> > different coil wrapping style for his secondary.  It
> went something like
> > this.  Imagine a secondary coil winding that starts in
> the middle, instead
> > of one end to the other.  THis person took their wire,
> folded the length
> > they wanted to use in half.  From the middle of the
> secondary, they wrapped
> > half of the wire length in one direction and towards
> the bottom.  Then, they
> > took the other half of the wire (the un-used portion
> as of yet) and wrapped
> > it in the opposite direction, and towards the top of
> the coil.  My question
> > is:  What would this be used for, and, would it
> actually work as a
> > secondary?Ryan
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