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Re: bulkheads / baffles in secondaries

Original poster: Yurtle Turtle <yurtle_t@xxxxxxxxx>

If you're worried about trapping fumes, why not glue
one solid baffle, then glue the second baffle with a
hole in it. Once the glue has dried, and all fumes
have dissipated, simply plug the hole with a rubber


--- Tesla list <tesla@xxxxxxxxxx> wrote:

> Original poster: "Gerry  Reynolds"
> <gerryreynolds@xxxxxxxxxxxxx>
> Hi Bill,
> There are some in the group that say two solid
> baffles, one from each
> end. I too worry about trapped fumes and I only put
> one 1/2 inch
> thick solid acrylic baffel down from the top enough
> to support the
> topload.  I do have another baffle at the top as an
> end cap with a
> center hole to allow the support tube for the top
> load to enter.  It
> may depend on what you use for a form whether two
> baffles are
> necessary.  I use an acrylic form so its is a good
> insulator.  If you
> use more than one baffle, you may want to have holes
> in the center to
> allow ventilation.  At least the extra baffles will
> increase the
> tracking distance.
> Gerry R.
> >Original poster: Gomez Addams
> <gomezaddams@xxxxxxxxx>
> >
> >This is addressed to those who have experience
> installing internal
> >baffles or bulkheads in secondaries, for the
> purpose of preventing
> >internal creepage sparks (internal racing arcs):
> >
> >I have never used internal baffles before, and have
> never seemed to
> >need them on any of the secondaries I've built.
> (although once,
> >someone building secondaries for me for commercial
> sale at a company
> >I was consulting for had racing arc problems, but I
> soon discovered
> >they had decided to paint the secondary form with
> black paint "for
> >looks" before winding it!)
> >
> >But now I am attempting to build one of the most
> robust, good-
> >looking, and efficient / high-performing coils I've
> ever built,
> >taking into account all the new developments which
> have turned up
> >since I last built a coil, so I thought I'd go
> ahead and install
> >baffles just for the heck of it.  I seriously doubt
> they'll do any
> >harm, and if they'll make the secondary even more
> "mistake-resistant"
> >then I'm all for it.
> >
> >So my main question is: do you typically install
> them while building
> >the form, with holes in the center of each baffle
> for your winder
> >shaft (assuming you use one), or do you wind the
> coil first, remove
> >the end plates, install solid baffles, and replace
> the end plates, or
> >what?
> >
> >Since I have a large enough lathe, I _could_ wind
> the form without a
> >shaft going all the way through, but I prefer to
> use a shaft to
> >provide support to the form.
> >
> >Also, I'm thinking it would be smart to leave holes
> for ventilation
> >so things like glue fumes (after construction) and
> later, ozone, can
> >escape the interior, so perhaps baffles with center
> openings are best?
> >
> >Opinions?
> >
> >  - Bill Lemieux
> >
> >
> >
> >

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