Re: secondary question...

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Callum Brieske" <callum@xxxxxxxxxxxxxxxx>

Hi,
I this is my first post here, I am in the process of building my first tesla
coil, A DC Coil. I have wound and varnished my 4" coil and will try with
expanding foam and then put end baffles in. I will report if I have any
problems, I might even do a trial and see what 25kv does to the stuff. From
my understanding it is not water soluble so it will probably be just like
puffed up P.U., And as for the recommendation to wet the surroundings I that
just causes the foam to stop expanding, IE so there is a layer of thick PU
so it bonds well. I can see any reason why the foam should present any
problem.

-Callum Brieske
New Zealand
(Building FIrst Coil)
Callum@xxxxxxxxxxxxxxxx
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, October 09, 2006 5:28 PM
Subject: RE: secondary question...


> Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>
>
> My first thought was that this foam is typically polyurethane -
> essentially the same stuff we coat out coils with.  But then I realized
> that in order for the foam to cure, they say you need to moisten the
> cavity that you're filling.  Maybe not such a good idea...
>
> Regards, Gary Lau
> MA, USA
>
>  > Original poster: Slurp812 <slurp812@xxxxxxxxx>
>  >
>  > OK, so I got some PVC, and been doing research on secondarys. It was
>  > sugested somwhere that baffles be installed on the inside. OK, so I
>  > was thinking of a quick and dirty way of sealing up the inside. What
>  > if I were to just fill the inside of the secondary PVC pipe with
>  > expanding foam? Do you think that would work, or make it more lossy?
>  >
>
>
>