Re: Toroid Height

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

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

Gerry,

Moving the toroid height above the secondary decreases magnetic coupling 
from the secondary coil to the toroid.  Upon closer inspection, the toroid 
can easily be seen as a single shorted turn in the secondary system.  This 
is especially apparent in CW coils like my solid state coil.  I was running 
the toroid close to the top of the secondary and getting rather dismal 
sparks.  I then went to move the toroid higher to determine the optimal 
height and found it to be very hot to the touch, almost to the point of 
making it impossible to pick up.  I raised the toroid and increased output 
at least 1.25 to 1.5 times what I was seeing before.  I'm going to try a 
toroid with an insulating disk to break the current loop in it and see how 
it performs.

Chris Arnold

P.S. I got my SSTC twins fired up last night and was able to perform some 
very nice audio modulation.  Now all I need to do is drop the number of 
primary turns and see what it can really do.


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Toroid Height
>Date: Wed, 24 Sep 2003 08:24:11 -0600
>
>Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net>
>
>Hi all,
>
>If one sets the toroid height too high above the secondary, the top turn 
>of the secondary is not shielded properly and breakout can occur from the 
>top turn.
>
>QUESTION:  What is the motivation for raising the toroid above the top 
>turn.  Why doesn't one put the tororid at the position of the top turn???
>
>Gerry R
>Ft Collins, CO