Re: Toroid on CW TC

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Chris Arnold" <chris_arnold-at-msn-dot-com> 

Vladi,

A toroid does serve several important functions in CW coils.  First, it 
protects the top turns of the secondary coil from breakout, allowing you to 
direct the output where you would like.  Second, of more concern to those 
building solid state coils, is the toroid lowers the resonant frequency of 
the secondary system.  As a general rule, the power sections of solid state 
coils like as low a frequency as possible, since most losses occur during 
switching.  Third, and much less common, they can be used to increase the 
length of the discharge from the coil, just as in a conventional coil, but 
not to the extent possible with a conventional design.  Too large a toroid 
on CW coils tends to make them self destruct, primarily because they 
*really* don't like what gets kicked back out of the secondary system if it 
doesn't make its way into pretty sparks.

Chris Arnold


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Toroid on CW TC
>Date: Sat, 27 Sep 2003 09:11:19 -0600
>
>Original poster: Vladimiro Mazzilli <mazvla-at-iol.it>
>
>Hi all,
>I wish to know the real necessity of a toroid on Tube working or SS
>tesla coil.
>
>Thank
>
>Vladi.