Re: Building the Primary Coil

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Steve White by way of Terry Fritz <twftesla-at-qwest-dot-net>" <slwhite-at-zeus.ia-dot-net>

I cut each coil support identically. Then to allow for the offset between
windings, I merely attach each coil support to the base with the required
offset from support to support. This method allows all supports to be cut
identically instead of each one being custom made.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, October 31, 2001 6:32 PM
Subject: Re: Building the Primary Coil


> Original poster: "R Heidlebaugh by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>
>
> on 10/31/01 7:11 AM, Tesla list at tesla-at-pupman-dot-com wrote:
>
> > Original poster: "Lau, Gary by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> > <Gary.Lau-at-compaq-dot-com>
> >
> > Assume your turns are spaced 0.50" center-center, and that you have 4
> > supports (six or more is typical, but assume 4 for this exercise).  Also
> > assume that the innermost turn is 3" from the center of the circle.
> >
> > Each support must be 0.50" / 4 = .125" more distant from the center than
> > the previous one.  So the first turn of each of the supports are located
> > at:
> > Support  Radius
> > #1  3.00"
> > #2  3.125"
> > #3  3.25"
> > #4  3.375"
> >
> > Gary Lau
> > MA, USA
> >
> > -----Original Message-----
> > From:  Tesla list [mailto:tesla-at-pupman-dot-com]
> > Sent: Wednesday, October 31, 2001 7:42 AM
> > To: tesla-at-pupman-dot-com
> > Subject: Re: Building the Primary Coil
> >
> > Original poster: "Patrick Bloofon by way of Terry Fritz
> > <twftesla-at-qwest-dot-net>" <transactoid-at-home-dot-com>
> >
> > My question was more meant to address the issue of how people make their
> > spacings on whatever they use to space the turns. I'm really bad with
> > "visualizing" construction plans. If you have say, 4 supports, you don't
> > just drill equally aligned holes up the supports do you? In order for it
> > to
> > spiral, won't each supports' holes have to be offset from the previous
> > one???
> >
> > Sorry if this is a really simple question. I just cannot picture this in
> > my
> > head....
> >
> > Thanks,
> > Patrick.
> >
> >>
> >> Since a picture is worth a thousand words, I'll spare you the
> > bandwidth.
> >> Just go to the Tesla Coil Web Ring:
> >> http://nav.webring.yahoo-dot-com/hub?ring=TeslaRing&list
> >> and look at how everyone else does it.  Mine is illustrated at:
> >> http://people.ne.mediaone-dot-net/lau/tesla/primary.htm
> >>
> >> The spacing between turns is not at all critical.  The only
> >> consideration is that whatever method you use to make the "tap"
> >> connection should not short to the next turn.  Using too wide a
> > spacing
> >> will lower the coupling and require more turns and tubing for the same
> >> inductance.  Most of us use about a 1/4" space between turns. (1/2"
> >> center-center w/ .25" tubing)
> >>
> >> Regards, Gary Lau
> >> MA, USA
> >
> >
> >
> >
> >
> >
> >
> >
> If you have a router and a dovetail jig that will make the job easy. Make
> each suport a little long at the start, then after all the groves are cut,
a
> bit larger than 1/4 in, cut the offset distance to fit your coil. If you
try
> to ajust for the spiral offset before hand you only make the job hard. As
> wou wind your coil the tubing tends to jump out of the groves so I tack
them
> in place with 5-min epoxy or cable ties until I'm finished. Then I make
them
> solid with epoxy after I'm finished.
>     Robert H
>
>
>
>