Re: [TCML] Secondary to toriod ?

["DC Cox" <resonance@xxxxxxxxxxxx>]

I suggest a fiberglass threaded rod (McMaster-Carr), 1/2-13 NC x length
required.  They are mfg in 36" lengths.  Using a few fiberglass nuts this
would allow for a large range
of toroid height adjustment.  After you find the best length, then cut a
piece of PVC pipe to act as an additional support/stabilizer.  That's how I
do it.

The metal bolt should also work, but I usually avoid any metal on top except
the toroid.

Dr. Resonance




On Sun, Aug 24, 2008 at 10:39 AM, stanley miller <swm334@xxxxxxxxx> wrote:

> Hi all,
>
> I am wondering if anyone could explain why a zinc carriage bolt inserted
> into the center of a plastic cover, glued on top of the secondary, with
> the bolt head inside covered by a plastic cap would not work or be
> potentially dangerous.  This would allow the toriod to be completly
> adjustable, limited only by the size of the bolt.  I have never seen a TC
> with this sort of setup, it is always with standoffs or pvc piping rigged up
> in some way or something else.
> Please correct me where my theory is wrong.
>
> -If the secondary cover sits 1.5" to 2" inches above the last winding on
> the secondary the only thing that could still affect the bolt would be
> magnetic field which i do not see how it would hurt the bolt or shunt it in
> anyway.
>
> -Since the toriod would be at the same potential as bolt there would be no
> fear of arcing to it.
>
> -The bottom inside of secondary would have nothing metal to arc thru from
> top to bottom.
>
> -since toriod capacitance is dependent on size wouldn't the bolt add a
> small amount to the overall capacitance of toriod
>
> -I am embarassed to say i have an electrical degree and work in electronic
> field and am asking such a silly question.  ( but i do not pretend to know
> anything about tesla coils or high voltage for that matter!)
>
> Thank ya all!
> Stan
>
>
>
>
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