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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