Re: Making Flat secondaries - disaster #1...

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Esondrmn-at-aol-dot-com>

In a message dated 2/16/02 9:48:19 AM Pacific Standard Time, tesla-at-pupman-dot-com
writes:

We drill acrylic frequently to mount windshields on golf cars.  We use a
special drill bit made for plastic that has a much higher angle on the tip than
does a bit for drilling metal.  The beveled tip is three or four longer than
normal.  We also use a high speed air drill.  Works like a charm.  Of course,
everyone doesn't have a high speed air drill at home.

Ed Sondemran

>
> Hi Terry.
>
>     Sorry to hear about your disaster <:-0.  You might try to get thick
> plexiglass (1/4" or larger), leave the protective coating on, and use
> your "failed" method.  Also, as you wind the coil, drip varnish or epoxy
> onto the incoming wire (epoxy is probably best, since varnish could have
> a hard time drying in the confined space.).  Plus, drilling plexi is
> touchy, but drilling glass (w/o good equipment) is "a bit" harder.  I
> think someone proposed this a little while ago.
>
>     Wait for the epoxy or whatever you use to cure/dry, then pull the
> sheets of plexiglass apart.  The film may or may not come off the coil,
> but it only adds insulation if it won't.
>
>     With regard to putting holes in plexiglass, I usually leave the drill
> in the box, and use a hot object to melt holes in it instead.  What bur
> is left easily comes off when "coaxed" with a sharp object, and the
> fumes aren't TOO bad :-).  It's better than sending shrapnel throughout
> your garage and destroying the piece in the process.
>
> Just a thought.
>
> Hoping disaster #2 isn't on the way....
> Winston K.