Re: [TCML] finishing a secondary - would insulating foam be a good idea?

["Phillip Slawinski" <pslawinski@xxxxxxxxx>]

I've never tried filling a secondary with expanding foam.  Maybe it would
work, however if there were ever a case where some internal arcing occurred
it would sure be a pain to fix.  You'd probably end up winding a new
secondary.  Another thing to consider is the weight the foam will add to
your form.  This could increase the chances of damage to the secondary if
it's dropped.

On Sat, Oct 4, 2008 at 09:24, Lau, Gary <Gary.Lau@xxxxxx> wrote:

> I've not previously heard of anyone using the expanding foam to fill a
> secondary, but it seems like it would do a good job in preventing internal
> arcing.  I can see no down side to doing that.
>
> However, the vast majority of secondary coils are built without any
> internal baffles or other measures and problems simply don't occur, unless
> construction errors like allowing the wire to enter the tubing are made, or
> if the coil is absurdly over-powered.
>
> Regards, Gary Lau
> MA, USA
>
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > Behalf Of Thomas Ryckmans
> > Sent: Saturday, October 04, 2008 8:40 AM
> > To: tcbouklist@xxxxxxxxxxxxxxx; tesla@xxxxxxxxxx
> > Subject: [TCML] finishing a secondary - would insulating foam be a good
> idea?
> >
> > Hello,
> >
> > I am finishing my 4 inches/10 cm diameter secondary, fitting a few PPE
> disks
> > inside to prevent arcing and a couple at the ends to help fitting with
> > primary base and the topload respectively
> >
> > Would it be a good idea to fill the secondary tube with insulating foam
> to
> > further prevent internal arcing? The foam is the one that come in
> canisters
> > and expands and harden once sprayed. Polymer is either polyurethane or
> > polystyrene.
> >
> > Many thanks for your comments,
> >
> > Thomas
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla