Re: Brass bolt for top cap on secondary to secure toroid (fwd)

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Original poster: List moderator <mod1@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Thu, 26 Oct 2006 18:20:23 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Brass bolt for top cap on secondary to secure toroid (fwd)

Hi John,

Better "security" to use nylon. However, with that said, I've done it 
just as you have shown and never had an internal arc, but I don't do 
that any longer just for the "security" factor (I know it's just a 
matter of time). There is a greater risk of an internal arc using a 
metallic screw instead of a nylon screw (or other mounting method). If 
you use a brass screw, using a toroid with a center disc would be 
helpful to reduce high stress on the inside of the top cap. If your 
topload is something other than a toroid or if it is to be somewhat high 
above the end cap, then you have a greater risk of arcing from the 
screw. If possible, use nylon. In most cases, a large nylon screw is 
plenty of mechanical strength since it's simply sitting there. When 
moving the coil from here to there, always remove the toroid and remount 
it once the coil is in it's new position.

Take care,
Bart

Tesla list wrote:

>Original poster: List moderator <mod1@xxxxxxxxxx>
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>---------- Forwarded message ----------
>Date: Wed, 25 Oct 2006 22:40:06 -0400
>From: John <guipenguin@xxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Brass bolt for top cap on secondary to secure toroid
>
>Hello, I know most people use nylon bolts because of their
>non-conductivity.... but would there be any problems with doing
>something like this?
>
>Top of cap: http://i27.photobucket.com/albums/c178/GUIPEnguin/capup.jpg
>Bottom of cap: http://i27.photobucket.com/albums/c178/GUIPEnguin/capdown.jpg
>
>When I apply a thick glob of silicone to the inner bolt, and then
>silicone in a tight-fitted lexan disk? Along with a baffle at the
>other end of the pipe...... this should be reasonable protection from
>an internal spark using this small brass bolt right? Want to make sure
>before I silicon everything tightly in place.
>
>Thanks,
>     John.
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