RE: [TCML] Quick and Cheap Toroid

["Phil Tuck" <phil@xxxxxxxxxxx>]

Brandon,
The minor diameter, in your case 7 inches, will determine whether the coil
breaks out without a breakout point, or with. A bigger diameter means a
higher top voltage is needed to breakout out un-assisted. I only have 12kv
pigs / NSTs as a max available here (UK) and I would probably choose 6
inches here for an NST, BUT others in the USA who use 15kv will have more
knowledge on this so listen to them.
The overall diameter will provide shielding and generally a I prefer bigger
size rather than smaller.
The varnish, I think, is best brush painted as you can have it thicker,
allowing sanding down between coats (if you're real keen) . All the little
dust bits that inevitably always get stuck in varnish, may show as 'dimples'
under the Alu' tape.
After about a day, varnish here is touch dry, but if you slide your hand
over it, it still has a slight drag to it, so that was when I put the tape
on. I did try paint instead on one of them once, and it was far less
effective, but paint types vary.
One last point - it's incredibly boring putting the tape on. Don't try and
put great long lengths on - it kinks. Minor kinks can be smoothed out by
burnishing it, Piece of cloth over the affected area, and use the back of a
spoon against the cloth. I burnish the whole thing afterwards anyway.

Regards
Phil Tuck

www.hvtesla.com

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Brandon Hendershot
Sent: 13 March 2013 03:12
To: Tesla Coil Mailing List
Subject: RE: [TCML] Quick and Cheap Toroid

Phil,

At this stage, the center piece in the toroid should be seated for good,
right? Also, on a bit of a side note, I'm starting to think that my topload
may be a bit Overkill. I've made it 7"x24" give or take a half an inch for
the spackle to come. My secondary is 4"x14.5" , 15/30 (120v), and 18 turns
on a 0.25" x 24" flat primary coil.

Thanks a lot,
Brandon

On Mar 12, 2013 6:37 PM, "Phil Tuck" <phil@xxxxxxxxxxx> wrote:
>
> Brandon,
> It's much easier if you have a framework where you can spin the whole
affair
> round (by hand will do) This makes smoothing the filler with sandpaper
much
> easier when it's dry. Applying the filler initially when it's wet really
> needs to be done in sections, forcing the stuff into the corrugations.
> The varnish coats by the way are to allow the Alu tape to stick - it won't
> stick at all to the soft powdery filler surface otherwise.
>
> Regards
> Phil Tuck
>
> www.hvtesla.com
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> Of Brandon Hendershot
> Sent: 12 March 2013 23:04
> To: Tesla Coil Mailing List
> Subject: RE: [TCML] Quick and Cheap Toroid
>
> That's exactly like the one I had seen, only better. I've already bought
> the things to make it. And words of wisdom regarding spackling/filling the
> duct?
>
> Thanks,
> Brandon
>
> On Mar 12, 2013 2:47 PM, "Phil Tuck" <phil@xxxxxxxxxxx> wrote:
> >
> > The individual tape sections make no differance at the typical voltage
the
> > top load has. Bend ducting around a wooden former, filler, sandpaper,
> > varnish, tape. http://www.hvtesla.com/toroid_2.html
> > The result is nice and smooth, letting the streamers 'dance' around the
> > surface.  When it gets scratched, simply burnish the area flat and
apply a
> > new patch, follwed by burnishing the patch itself. Mine has lasted three
> > years being bashed around.
> >
> >
> > Phil
> >
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf
> > Of Brandon Hendershot
> > Sent: 12 March 2013 19:23
> > To: Tesla Coil Mailing List
> > Subject: Re: [TCML] Quick and Cheap Toroid
> >
> > Woops, guess that would be good to know. 6"x~24". I saw something online
> > earlier about spackling an alum. duct, painting it and covering it in
> alum.
> > tape. Thoughts on this? I'm also kind of concerned about not conducting
> > across all of the alum.  tape.
> >
> > Brandon
> >
> > On Mar 12, 2013 6:16 AM, "W5als" <w5als@xxxxxxxxx> wrote:
> > >
> > > Hi
> > >       What size toroid are you wanting to make. Diameter and width
> > > Alton
> > >
> > > Sent from my iPad
> > >
> > > On Mar 12, 2013, at 12:54 AM, Brandon Hendershot <
> > brandonhendershot@xxxxxxxxx> wrote:
> > >
> > > > Hi All,
> > > >
> > > > I'm resuming the renovation of my coil since I'll be needing it for
> > class.
> > > > My previous alum. duct topload got smashed so I need to make a new
one
> > > > asap. I'm really tight on cash and would like to make something at
> > least a
> > > > 'little' bit neater than the last. I can't spend more than $30 and
> need
> > it
> > > > sitting pretty within 3 weeks. I'd love some suggestions!
> > > >
> > > > Brandon
> > > > _______________________________________________
> > > > Tesla mailing list
> > > > Tesla@xxxxxxxxxx
> > > > http://www.pupman.com/mailman/listinfo/tesla
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> > > Tesla mailing list
> > > Tesla@xxxxxxxxxx
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> > Tesla mailing list
> > Tesla@xxxxxxxxxx
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> >
> > _______________________________________________
> > Tesla mailing list
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> > http://www.pupman.com/mailman/listinfo/tesla
> _______________________________________________
> Tesla mailing list
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>
> _______________________________________________
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