Re: [TCML] Secondary Repair Question

[Gary Lau <glau1024@xxxxxxxxx>]

I think that if a coil is over-coupled to the point of generating racing
sparks, no coating is going to stop that.  Only by reducing the coupling,
raising the topload, or reducing the bang-size will help.

Regards, Gary Lau
MA, USA

On Mon, May 30, 2011 at 8:25 AM, Brandon Hendershot <
brandonhendershot@xxxxxxxxx> wrote:

> Hi All,
>
> First off, please excuse me for bumping such an old topic. I've been pretty
> pre-occupied with school and have finally gotten the time to focus on
> coiling. Anyway, I'd like to fix up the secondary coil before I do anything
> else.
> Would a few properly applied coats of Dolph's AC-43 over the existing
> flawed coating prevent any more racing arcs? Of course assuming I get it
> properly tuned and coupled first.
>
> Thanks!
>
> --
> Brandon H.
> teslacoilers.blogspot.com
>
> On May 3, 2011, at 8:43 AM, Carl Noggle <cn@xxxxx> wrote:
>
> > Hey---
> >
> > If you need something for a really bad burn, carefully cut out the burned
> sections of the affected turn sand dress the ends of the wires so they don't
> touch and create a shorted turn.  Shorted turns are the pits.  Then take the
> two ends of the adjacent good turns and solder them carefully in the gap.
>  Check with an ohmmeter to make sure you used the right wire ends.   I made
> a hole in the form and stuck the twisted ends into the interior of the coil
> (a relatively field-free region) and soldered them there.  Then trim
> everything up nicely and coat with epoxy.  It's ugly, but mine has been
> working for 12 years or so.  I have a good picture--if you would like one
> let me know how to get it to you.  Good luck, but it's not hard if you're
> careful.
> >
> > ---Carl
> >
> > PS--Avoid  LIKE  THE  PLAGUE  jumping arcs to the secondary coil.
> >
> >
> >
> >
> >> I've successfully repaired mine by cleaning it with a Scotchbrite pad
> and
> >> alcohol, then recoating. Yours looks worse than mine did, but you still
> may get
> >> away with it. If you choose to sand, I'd be very careful to clean all of
> the
> >> sanding grit, as I've heard some fine sandpapers use a conductive grit.
> It can't
> >> hurt to try.
> >>
> >>
> >>
> >> ----- Original Message ----
> >> From: Brandon Hendershot<brandonhendershot@xxxxxxxxx>
> >> To: Tesla Coil Mailing List<tesla@xxxxxxxxxx>
> >> Sent: Sun, May 1, 2011 5:15:36 PM
> >> Subject: [TCML] Secondary Repair Question
> >>
> >> Hi All,
> >>
> >> The last time I ran my coil a bunch of racing sparks caused some
> substantial
> >> damage to my secondary. I want to try and fix it before I go and rebuild
> it
> >> or just make another. Could I just patch it up with some Dolph's AC-43?
> Or
> >> do I NEED (note the emphasis on need) to sand it all off, do something
> about
> >> the carbon/char, and then re-coat?
> >>
> >> Thanks everyone!
> >>
> >> P.S. I posted some pictures of the damage on my TC blog. The link's in
> my
> >> signature.
>
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