RE: Metal traces in PVC pipe?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Garry Freemyer" <garryfre@xxxxxxxxxxx>

Copper would be yellow. Its is definitely not copper. I found a very small
piece of metal in a place that had not burned yet. The biggest fry was over
a rather large piece buried about an eighth inch inside the tubing.

I've removed the wire winding and I'm going to put some thick plastic
sheeting over the tube and then re-wind the secondary, then put an extremely
thick coating of plastic coating over it, I'll use some basting motor so I
can brush it on thick and have it turning so it distributes evenly. This
will eliminate the possibility of pieces of something like metal getting ON
the windings and possibly that metal from me grinding something is what got
melted and burned itself down into the pipe.

I never thought of the possibility that it might be metal that fell onto the
windings.

I tried a magnet, it appears the metal was not ferrous.

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Saturday, July 01, 2006 11:41 AM
To: tesla@xxxxxxxxxx
Subject: RE: Metal traces in PVC pipe?

Original poster: Daniel Hess <dhess1@xxxxxxxxxx>


Garry;

Reason I ask about the ferrous / non-ferrous is I'm wondering if what
you're seeing is copper from the coil winding that was redeposited
inside the PVC after a burn-through. Or are you finding these
metallic 'grains' in places where there was no damage to the coil?
This is bizarre!

Daniel Hess





Original poster: "Garry Freemyer" <garryfre@xxxxxxxxxxx>




Garry;

 >Are the metal fragments you found in the PVC ferrous or non-ferrous?
(See if they are attracted to a magnet or not.) Are you using the
blue-green sewer PVC or the white schedule 40 variety?

The bits are too small to determine their nature, the fragments are too rare
to be of any purpose and too small to detect, being smaller than a grain of
salt usually. It appears to be perhaps tiny shavings from some source,
perhaps from a saw that cuts the pipe into lengths and the bits occasionally
become lodged in the plastic before it hardens fully.

It's the white schedule 40 variety. Precious little else was available.

 >By any chance do you install insulating discs inside the coilform?
(To prevent internal arching?)

Normally I do, I thought I had done this with this latest form but this
time, I used silicone seal. I think I will be sure to put some insulating
disks within.

The holes do not go clear through the pipe. There are no burns within.

  >Original poster: "Garry Freemyer" <garryfre@xxxxxxxxxxx>

  >I've had three or more Tesla coil secondaries die from flaring out the
side
  >of the secondary coil. I've just finished an autopsy on the secondaries
and
  >discovered a bit of a surprise.

Daniel Hess