Re: Secondary Core.

• To: tesla-at-pupman-dot-com
• Subject: Re: Secondary Core.
• From: "Barton B. Anderson" <tesla123-at-pacbell-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Fri, 21 Apr 2000 12:04:03 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

>
> Original Poster: "Ruud de Graaf" <rdegraaf-at-daxis.nl> 
>  

Hi Ruud, 

(my first post in a couple weeks due to surgury - appendix decided to go south)


To eleborate a little on John's comments: 

I think John's comments come from his own experience and the many discussions
we have had on the list on this subject. One thing I will elaborate on is that
PVC, sonotube, poly forms, etc.. are all used with little difference, but each
form is "treated" before winding. So in essence, the ability to absorbe
moisture in the form is treated to reduce and prevent moisture absorbtion.
Moisture is bad (and I would say even 3%) at the voltages our coils are
processing. The forms "treatments" may contradict your original thoughts. Of
course, by treatments I am referring to drying and sealing the forms. Once this
is done, it is no longer simply PVC, or Sonotube, or whatever. 

Bart 
>
> > Overall, the coil form material has minimal effect on the spark output, 
> > and as far as coating the coil, this helps to protect the coil from 
> damage, 
> > from racing sparks, and holds the wire in place.  The form of course 
> > should not be an extremely lossy or conductive material which would 
> > of course be NG.  But if you replace PVC with polyethylene for instance, 
> > you won't see an improvement. 
> > 
> > Cheers, 
> > John Freau 
> > 
>
> Hi John, 
>
> This is the first time in 2 1/2 months I have seen a statement like this 
> (since I joined the list)! And I can tell you, it makes me happy to see a 
> support for my feeling I had about this subject. I couldn't imagine that 
> max. 3% water in PVC could absorbe a noticable amount of energy. The more 
> because of the limited volume we talk about. But I wonder, is the conclusion 
> based on your own observation. Understand me well, I do not have a 
> reservation against your statement. I'am only interested in the way you 
> found out something that I felt to be true with only basic knowledge. (I 
> hope I expres myself clearly, because the amount of white port I had). 
>
> Greetings from very dark Holland without any lightning :-(( , 
>
> Ruud

• Re: Secondary Core.
• From: "Ruud de Graaf" <rdegraaf-at-daxis.nl>

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