Re: [TCML] Where to mount the HV Transformer? Under the coil or otherwise ?

["DC Cox" <resonance@xxxxxxxxxxxx>]

I avoid coax.  It may or may not work depending on the particular parameters
of your nst.  Some can cause a resonance with the high capacitance of the
coax cable.

I just use two silicone GTO wires with a separate 12 AWG ground wire.  This
works good.

Dr. Resonance




On Tue, Jun 24, 2008 at 11:36 PM, Jeremy Scott <supertux1@xxxxxxxxx> wrote:

> I read the coax idea off of this site:
>
> http://www.pupman.com/safety.htm
>
> Somewhere in there it says this:
>
> "The transmission line between your high voltage transformer and your tesla
> coil is another potential source of electrocution. This should be
> constructed using neon sign wiring (rated to 40 kV) or thick coaxial cable
> like RG-8A/U or RG-11A/U. If using coaxial cable, use the inner conductor
> for the high voltage, and strip back the outer braid about 6-12 inches from
> each end. Connect one end of the braid to your RF ground. Leave the other
> end unconnected so it does not form a current loop. Some coilers also place
> their high voltage cables inside a plastic conduit, which is laid on the
> floor. This also protects the cable somewhat from strikes."
>
> I was just wondering if anyone has any experience doing it that way.
> This is basically the 50 and 75 ohm impedance cable that you can get
> anywhere. They have a thick PTFE insulation between the core conductor and
> the braid which I think would be ideal for isolation. The braid being a nice
> additional safety feature.
>
> On the other hand... just don't know.
>
> It would be interesting to see just how much voltage it takes to pop one of
> those cables.
>
>
> --- On Tue, 6/24/08, MIKE BAILEY <m.bailey@xxxxxxxxxx> wrote:
>
> > From: MIKE BAILEY <m.bailey@xxxxxxxxxx>
> > Subject: [TCML] Where to mount the HV Transformer? Under the coil or
> otherwise ?
> > To: tesla@xxxxxxxxxx
> > Date: Tuesday, June 24, 2008, 4:42 PM
> > I have my transformers mounted in my control cabinet and run
> > coax cable out to my RSG mounted under the coil , seems to
> > work good no problems so far. I would not connect the
> > braided part of the coax to rf ground , if there are any
> > weak areas in the insulation between the center conductor
> > and the braid or any microscopic holes it will eventually
> > fail and you will have a short to ground and the cable
> > could catch fire. I had a situation where I think there was
> > a break in the center conductor and arcing occured which led
> > to the white cable i was using turning black and started
> > smoking . what I do is just strip the outer layer of
> > plastic and expose the braid and connect it all together
> > with the center conductor and leave lots of space between
> > the 2 cables running out to the coil.
> >
> >   Mike
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>
>
>
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