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Re: Secondary additions and corona breakout
Subject: Re: Secondary additions and corona breakout
Date: Fri, 16 May 1997 09:02:31 +1200
From: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz>
Organization: Wellington Polytechnic, NZ
To: tesla-at-pupman-dot-com
Alfred, John,
> From: "Alfred A. Skrocki" <alfred.skrocki-at-cybernetworking-dot-com>
> To: Tesla List <tesla-at-pupman-dot-com>
>
>
> On Wed, 14 May 1997 11:06:13 -0400 (EDT) John Freau
> <FutureT-at-aol-dot-com> wrote;
>
> > Alfred,
> >
> > I regularly patch burned secondaries by soldering, and I also add
> > extra top sections if needed. I have not had any problems with
> > corona breakout even with bumpy solder joints.
>
> Interesting! quite a few years ago I tried winding a secondary made
> of numerous short lengths of enameled wire. I soldered each joint and
> coated it with gliptol if I remeber correctly, any way I do
> distinctly remeber that when I powered up that coil I had corona
> break out at each and every solder joint. Granted I didn't saturate
> the windings in polyureathane as I do now but still I remeber having
> a dickens of a time trying to stop the coronal breakout, untill I
> finally scratched the whole idea and ever since I have only been
> using continous lengths of wire for my secondaries. Perhaps I should
> try it again and this time give the final coil several coats of
> polyureathane.
I have one prize coil wound with Litz wire (3" dia). The litz wire
was a bargain basement reel costing $5. Unfortunately, the reel had
two lengths on it which necessitated a solder joint about half way up.
The coil is heavily varnished and that joint has never given a
problem or issued corona. The coil was giving 3' sparks at the time a
crook cap set fire to it at the base.
Malcolm