Re: [TCML] 1st Run

[DC Cox <resonance@xxxxxxxxxxxx>]

Be sure to thoroughly sand your PVC tube inside and out. Some of the
lettering or junk on it may be slightly conductive at 300 kV.  BTW, never
clean a coil with Windex --- it is a slight semiconductor at these
potentials.

Then seal tube with 2 coats of Dolph's AC-43.  I then silicone a 1/4 thick
piece of acrylic circle (tight fit inside sec coil) approx 3 inches up from
bottom and another disk approx 4 inches down from HV end.  Tap in gently
with the wooden end of a hammer or mallet, then fix in place with a thick
1/4" bead of silicone (I prefer G.E. Silicone II).

Also, anytime you handle a sec coil after winding, be sure to wear gloves.
The sodium in the sweat and oils on your hands is a good conductor, even at
low potentials.  At 200 - 300 kV its asking for trouble to handle them with
bare hands.

Check your coeff. of coupling in JAVATC or measure it --- keep below 0.12 to
0.14 range so you don't overcouple and produce racing sparks.

On first-lights, always have a friend watch the rear of the coil, or use a
mirror so you can see it.  Always run in darkened room so you can see any
corona before it becomes destructive in nature.

Follow all these precautions, and you will have trouble-free coiling!!

Dr. Resonance




On Sun, Jul 18, 2010 at 2:58 PM, Miles Mauldin <teslamiles@xxxxxxx> wrote:

> 1st Run, not so good.  Was really looking forward to seeing my work come to
> fruition but it was so short lived I didn’t even have a chance at the
> camera.
> On the first run I saw more than a dozen 15-18" streamers all around the
> top
> toroid, that was taping around the 9th turn. I didn’t realize how hot the
> primary would get.  I could not touch the clamp on the primary for several
> minutes.  Everything looked great at this point.  I tuned a half turn in
> and
> started another run at about 60% power but didn’t see any streamers at
> all.  In
> fact I started smelling something burning. At that point I turned
> everything off
> and found the source of the smell on the far side of the coil from me.  The
> secondary had a catastrophic failure internally.  Photos here ->
> http://www.cmnow.com/TeslaMan/1stRun/
>
> I guess I’m going to be winding another secondary but this time with a
> different
> design; I truly believe the design caused my failure and not some
> contaminate
> within the PVC tube.  So maybe the correct design for a secondary coil is
> to not
> have any “ANY” external connections to the windings internally to the coil
> form.
>
> Best thing I can say about last night; Mr. Butters didn’t make a show….
>
> Next is always better.
> Miles M
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>
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