Re: coil form idea (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Mon, 04 Jun 2007 19:24:40 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: coil form idea (fwd)

Hi Drake,

Kind of did something like this. That sonotube coil I was talking about 
in the other post, well, it was retired and divided into a few sections. 
One of these sections I removed the inside of the cardboard, however, 
water didn't help much in my case due to the internal coating. I 
literally had to find the layered cardboard sections and simply pull and 
tear out the cardboard (sounds harder than it actually was). The end 
result was a coil held together with only the coating. This made the 
coil rather flimsy. You could easily squeeze it and deform it (but it 
always sprung right back into shape).

This coil was used for dielectric testing only. But my thought here is 
that it's doable, but you would have to use some other type of form for 
a topload (unless the topload is something that doesn't weight much).

Take care,
Bart


Tesla list wrote:

>Original poster: List moderator <mod1@xxxxxxxxxx>
>
>
>
>---------- Forwarded message ----------
>Date: Sun, 3 Jun 2007 15:02:06 -0500
>From: Drake Schutt <drake89@xxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: coil form idea
>
>Well this talk about coil forms got me thinking.  TC's are technically
>speaking air core resonant xformers, but has anyone ever made a secondary
>without a coilform?  I know it's not necessary, but it would be interesting
>to see the results.  The easiest way I could think of doing this would be to
>wind the secondary over a sonotube, then coat it with whatever
>(dolphs?)......and throw it in a swimming pool.  That softens the cardboard
>so you can just pull it out.  You would have to have a really light topload
>but I still think that it's possible.  Any thoughts???  What percentage are
>the actual losses in say a regular PVC coil?  I think this would be
>something to do only if you were trying to max out efficiency.
>
>Drake
>
>
>
>
>
>  
>