Re: Secondary structure

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

Original poster: "David Speck by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Dave-at-DavidSpeckMD-dot-org>

Dan,

I assume that you are referring to a metal threaded rod.

If so, this would not be recommended -- it would cause significant
losses due to eddy currents, and might be a path for internal arcing.

I'd suggest checking out the local farm supply store where you can find
3/8" x 48" pieces of white glass / epoxy rods intended for electric
fence posts.  They're about $0.75 each, non conductive, and very
strong.  Use nylon screws through the edges of your plexi discs to hold
things together.  IMHO, the only metal that should be in your secondary
is the wire winding itself and the toroid.

HTH,

Dave G2-1170

Tesla list wrote:
> 
> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Dan_Gallagher%PULSARNOTES-at-pulsartech-dot-com>
> 
> Hi fellow sparkers,
> 
> I want to make my secondary this weekend but have a question.
> 
> Can I use all-thread down the center of the secondary to hold the plexiglas
> discs on the ends and to mount the toroid onto the top? This will also make
> it easier to wind the wire on with all-thread stubs sticking out each end.
> I can use those stubs to hold the secondary in the lathe. But I'm wondering
> if I can leave the all-thread in during operation of the TC.
> 
> Thanks
> 
> Dan
> Ft. Lauderdale