Re: Secondary breakout -is it necessary to rewind?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Steve White by way of Terry Fritz <twftesla-at-qwest-dot-net>" <slwhite-at-zeus.ia-dot-net>

I put 10 coats of polyurethane on my secondary until I could not even feel
the coil windings on the exterior surface. It did wick for a while, but you
can finally put enough coats on to bury the windings. It took a few days to
get all the coats on.

Steve: Coiling in Iowa

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, July 10, 2002 6:52 AM
Subject: Re: Secondary breakout -is it necessary to rewind?


> Original poster: "Ben McMillen by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<spoonman534-at-yahoo-dot-com>
>
> Varnishing of your secondary is a highly recomended
> practice.. I wound a new 4 x 25" secondary on the 4th and
> just finished applying the 6th coat of varnish tonight...
>
> While letting it dry, I noticed something very intersting..
> The coil seems to be 'wicking' the varnish down between the
> windings and leaving little 'valleys' between turns.. even
> though I'm on my 6th coat.. I spent some time removing bugs
> and did some light sanding to try and smooth things out for
> the next coat, but it still does it.. only less than
> before.. Has anyone else had this problem? Might this be a
> cause for breakout from the secondary in undwanted places?
> (i.e. racing sparks)
>
> Just a thought..
>
> Coiling in Pittsburgh
> Ben McMillen
>
> --- Tesla list <tesla-at-pupman-dot-com> wrote:
> > Original poster: "Jolyon Vater Cox by way of Terry Fritz
> > <twftesla-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>
> >
> >
> > This Tuesday afternoon my 3" x 10 7/8" inch, 880 turn
> > secondary suffered an
> > intermittant breakout to the grounded end of the primary.
> >
> > The secondary was being run from my ignition-coil HVDC
> > supply in conjunction
> > with with six parallel pop-bottle saltwater caps, with
> > the primary tapped at 8
> > 1/4 turns.
> >
> > Will I have to rewind the secondary? I have examined the
> > area from which the
> > arc emerged with a magnifying glass and cannot see any
> > evidence of cracked
> > insulation or burning.
> >
> > This appears to be an intermittent fault that (as yet)
> > only appears to arise
> > occasionally when the coil is made to produce large
> > sparks i.e.>5 inches.
> > Before the "incident" it was my intention to coat the
> > secondary in Tuffkote
> > epoxy varnish -in view of the present circumstance should
> > I be contemplating
> > this and is varnishing at all likely to prevent the
> > re-occurance of  an
> > "occasional" problem of this type?
> >
> >
> >
>
>
>