RE: Airtight Coil form

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

Original poster: "Stolz, Mark by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Mark.Stolz-at-st-systems-dot-com>

First off I would like to thank everyone for heir responses to this question
on the coil form needing to be airtight.  Apparently I had picked up some
bad information that created this question.

I think that Gary Lau has a point that there are many Tesla websites, but
not all are accurate in the info they provide.  Being new to coiling, it's
not always easy for me to discern the accuracy of information.  But I am
learning and I think the decision to join this list will be a great help in
getting good information.

Thanks again,

Mark Stolz
Houston, TX

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Wednesday, March 14, 2001 12:53 PM
To: tesla-at-pupman-dot-com
Subject: RE: Airtight Coil form


Original poster: "Lau, Gary by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<Gary.Lau-at-compaq-dot-com>

Hi Mark:

While there are lots of Tesla-related web sites, the majority of them just
repeat things that they heard and think they understand, and add their own
perversions of the truth.  Plus, there are in fact a few aspects of coiling
that are truely not completely understood.  It would be presumpuous of me to
judge and name which sites are good and which are bad, so I'll have to leave
it to you to seek out the best ones.  (Hint - look for ones that make the
effort to use proper spelling!)

But to answer your question, there is no need to make a secondary form
airtight.  It would be impossible to maintain a vacuum in a PVC pipe no
matter how well the ends were sealed, and as you point out, low pressure air
is worse than atmospheric pressure so far as insulating.  The only thing
that is certain is that you don't want to drill holes in the side of the
form and put the ends of the winding inside the form.

Regards, Gary Lau
Waltham, MA USA


Original poster: "Stolz, Mark by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<Mark.Stolz-at-st-systems-dot-com>

Hi all,

My name is Mark and I'm beginning to get started into coiling.  I've been
reading lots from this list, and there is A LOT to read, and I've been
reading at tons of TC websites.  I haven't been able to find an answer to
the question of why does the coil form need to be airtight.  I thought it
might be due to internal arcing, but that didn't make sense since arcs can
still happen in a vacuum.  I figured this would be the best place to get an
answer from, since a majority of you are what I would consider experts.
Thanks!