Re: Fiberglass Resin and Secondary

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

Original poster: robert & june heidlebaugh <rheidlebaugh-at-desertgate-dot-com> 

Tyler: I just wanted to give you a word of warning I learned the hard way.
Polyester dose not bond well to other plastics unless you provide a
mechanical bond surface first. If you use a pvc pipe sand the surface and
spray a coat of clear spray before you wind and coat. This will provide a
rough solvent wetted surface for the polyester to bond to. I like polyester
because it is fast and thick. I brush coat my coil and then stand it
upwright while the resin hardens to a smooth coat . This avoids dripping;
Work over a plastic wrap to avoid clean up problems. The sanding and spray
coat prevents the polyester  separating from your coil form on a real cold
day causing your coil  to break free and slide down the form. a real mess.
    Robert   H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Tue, 30 Sep 2003 16:46:57 -0600
 > To: tesla-at-pupman-dot-com
 > Subject: Re: Fiberglass Resin and Secondary
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Tue, 30 Sep 2003 16:53:55 -0600
 >
 > Original poster: Tyler <blimpie120-at-yahoo-dot-com>
 >
 > That was just on my first tesla, with that one my primary is vertical
 > instead of horizontal. I built it before i really knew a whole lot about
 > tesla coils. The new one should work good.
 >
 > Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: Dave Lewis
 >
 > Hi Tyler,
 >
 > Polyester resin should work fine I would think, although a bit messy to
 > clean up after. One nice thing is it will be hard as a rock a day or so
 > later. I've been using polyurethane varnish for my coils and it takes
 > as long as a few weeks for the stuff to fully cure.
 >
 > One tip for getting a nice even thick coat is to rig up some kind of
 > aparatus that allows you to rotate the coil with a small electric motor
 > somewhere in the 20 to 60 RPM range. I used and old cordless drill
 > drive motor and chuck assembly for mine. With the coil spinning you
 > can practially pour on the finish right out of the can and level it with
 > a brush. Its amazing how thick you can put the finish on and it will
 > self level and come out perfect.
 >
 > Sounds like your system may be overcoupled though if yo! ur getting sparks
 > like that with 8 layers of laquer. You might want to adjusting your
 > coupling looser.
 >
 >
 > Good Luck
 > Dave Lewis
 >
 >
 >
 > Tesla list wrote:
 >>
 >> Original poster: Tyler
 >>
 >> Ok, pretty new coiler here. Has anyone ever tried using fiberglass resin
 >> instead of varnish or laquer on their secondary? You could get the
 >> fiberglass resin on way thicker than varnish or laquer, which would prevent
 >> arcing across the secondary a lot more. The coil i have is doing it
 >> sometimes, with like 8 layers of laquer on it. Only running 15000 volts at
 >> 30ma, with a WAY to small cap.
 >>
 >> I have now redesigned my plans tho. 3" diameter 17" tall secondary with 24
 >> ga wire, 850 turns. The res frequency will be around 372 kHz, with a
 >> .0053uF tank cap. 6" inner diameter primary, .025" pipe, spaced about .57"
 >> apart, bout 10 winds. A 13" x 3" or smaller tor! rid for the top. And a 
15kv
 >> 30ma NST for power, Still have to figure out the filtering protection for
 >> it though.
 >>
 >> This one i actually planed out, not like my first one where i just 
built it.
 >>
 >> Thanks in advance!
 >> ~Tyler
 >>
 >> =========
 >> ~Tyler
 >
 >
 >
 > =========
 > ~Tyler
 >
 >