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Re: [TCML] Corona Supression



I got a few bolts used as terminals I'd like to cover up. Some other structural nuts and bolts running close to wires I'd like to get some extra assurance on as well. I figured a round cap nut ought to suffice, but I prefer the idea of sticking on some rubber insulation. Any kind of rubber caps good for HV? I remember seeing something pretty fitting of the description in the hardware section down at home depot. It looked way too thin though...

On May 16, 2010, at 10:33 AM, Christopher Karr <chriskarr4@xxxxxxxxxxx> wrote:


Hello Brandon,

May I ask what the intended use is (I.e. the potential you're trying to suppress and the size of the connections which you're trying to cover)?

In my experience, corona suppression is as easy as:
- using too much solder and forming a 'blob' on the joint;
- using larger gauges of wire at connection points;
- after soldering, doing 'touch-up' work with sandpaper (various gauges, possibly, and finishing with 400-grit); - after smoothing out the free-air connection, insulating it with an insulative varnish (perhaps even corona-dope).

If you wish to test these, I recommend you use a highly-susceptible joint and then use the method described. The joint, of course, being a test-piece, as opposed to the actual part of the structure.

Good luck!

- Christopher Karr

From: brandonhendershot@xxxxxxxxx
To: tesla@xxxxxxxxxx
Date: Sat, 15 May 2010 20:38:34 -0700
Subject: [TCML] Corona Supression

Hi All,
There was a post I read a while back, don't remember what it was
about, but someone had mentioned that they would eventually end up
covering every little point that wasn't smooth with "corona supressing
caps". Does anybody know exactly what these are and where I could get
them and/or make them?
Thanks,
Brandon
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