Re: [TCML] Interesting Coil Wrap

["David Rieben" <drieben@xxxxxxxxxxx>]

Oops, looks like I opened mouth before engaging brain!
Now that I actually do THINK about, it would appear
that Greg is correct about the sum total of zero Henries
if the two secondaries are wound in opposite directions,
assuming all other aspects to be identical.

Doh!
David


----- Original Message ----- 
From: "G Hunter" <dogbrain_39560@xxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Saturday, August 02, 2008 8:25 PM
Subject: RE: [TCML] Interesting Coil Wrap


> 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
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
>
>
>
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