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RE: Form Material Info!!!

Hi all,
          I must have been suffering from brainlock:

On 17 Jul 00, at 8:14, Tesla list wrote:

> Original poster: "Malcolm Watts" <M.J.Watts-at-massey.ac.nz> 
> 
> Hi Dan,
> 
> On 15 Jul 00, at 10:41, Tesla list wrote:
> 
> > Original poster: "Dan Kunkel" <dankunkel-at-hotmail-dot-com> 
> > 
> > Gary,
> > 
> > why then do so many coilers "prep" their pvc forms by drying them with an 
> > oven and coating them with poly? is this considered an outdated procedure? 
> > are you saying all secondary form materials are the same in terms of 
> > performance?
> 
> They aren't - but most that you can think of are fine. Let me 
> recount a personal experience with the good and the ugly.
>      My best secondary (to date but that will soon change) is 
> wound on unsealed thickwall PVC drainpipe. I can detect a 6% 
> difference in its unloaded Q between damp and dry days. 

That should have been less than a 1% difference. Q went from 
320 to about 300.

Sorry,
Malcolm
<snip>