RE: [TCML] Question on Coil with Missing Turns

[James Zimmerschied <zimtesla@xxxxxxx>]

Thanks for the info. The coil as assembled would be a job to go inside ( it has baffles). It has been working ok with the repaired gap.
Jim
 

> Date: Mon, 8 Aug 2011 06:05:43 -0700
> From: cn@xxxxx
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] Question on Coil with Missing Turns
> 
> You can also just cut the damaged turns back 1/2 inch or so, then drill 
> a little hole through the form. Then leave a long enough piece on the 
> good turns to feed them through the hole and solder them on the inside 
> of the coil form (relatively field-free region). Then cover it all with 
> epoxy. It's ugly, but only in a small spot.
> 
> 
> 
> 
> > No, I didn't have to change a thing.
> >
> > Hank
> >
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> > Of James Zimmerschied
> > Sent: Friday, August 05, 2011 8:13 PM
> > To: Tesla
> > Subject: RE: [TCML] Question on Coil with Missing Turns
> >
> >
> > Hank,
> > thanks for the info on your experience with the missing turns. Do you recall
> > if the primary tuning point changed due to the missing turns?
> > Jim
> >
> >
> >> From: dr.hankenstein@xxxxxxxxxxxxx
> >> To: tesla@xxxxxxxxxx
> >> Subject: RE: [TCML] Question on Coil with Missing Turns
> >> Date: Sun, 31 Jul 2011 06:34:59 -0700
> >>
> >> Jim,
> >>
> >> I would tend to think you may have nothing to worry about for this reason:
> >> About three years ago, while setting up Zotzilla, which is a 20" by 42"
> > coil
> >> with a 5 foot corona ring, I inadvertently connected the primary to the
> >> wrong tap. During the subsequent full power run, the coil flashed over in
> >> two places which can be seen by the "splicing tape" on the following
> > photo:
> >> http://drsparksite.com/images/wwt2011/101.jpg Several turns were removed,
> >> the carbon was cleaned and the wire was carefully spliced back together.
> >> Oddly enough, the coil has never run better. It produces 10 footers with
> > an
> >> input power of 240 volts, 45 amps and 7.5kva using a 5kva pole xfmr. I
> > have
> >> purchased new wire, BUT, since it's running so good, I'm not sure if I
> >> really want to rewind it. I'm worried that a rewind would ruin the
> >> performance, although the coil would "look" good again.
> >>
> >> Anyway, that's my experience with "missing turns"
> >>
> >> Hank
> >>
> >> -----Original Message-----
> >> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> >> Of James Zimmerschied
> >> Sent: Saturday, July 30, 2011 6:58 PM
> >> To: Tesla
> >> Subject: [TCML] Question on Coil with Missing Turns
> >>
> >>
> >> I have recently obtained a 12" diameter by 45" coil with about 700 turns
> > of
> >> #18 wire. It had sustained damage from previous operation and my friend
> >> removed the burnt turns and spliced it. There is about six inches of coil
> >> below the gap which is about 1/2" wide. The remaining 39" is above the
> > gap.
> >> I am wondering if having two coils in series create any significant change
> >> in the coil characteristics? I have run this coil and don't get any corona
> >> at the gap since it was well spliced and covered with epoxy.
> >>
> >> Jim Zimmerschied
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