Re: [TCML] Toroid height, What's best

[futuret@xxxxxxx]

 Shaun,

Generally speaking, a higher toroid height will give you longer sparks, but will
increase the chance of seeing racing sparks or corona coming off the top
turns of the secondary.  Also, I think that if the toroid is quite large in diameter
compared to the secondary diameter, then the toroid can be higher, than
if the toroid is less large compared to the secondary diameter.  You may
have to re-tune the primary slightly if you change the toroid height, to see
the true effect on spark length.  The best toroid height is always a compromise
for the above reasons.  Only experimentation will determine the best height.
You'll probably be able to run the toroid 2" higher than it is now.
Some folks place a smaller toroid just above the secondary, which allows
one to set the main toroid higher than otherwise.  I did this on my TT-42 coil.

Regards,
John

 


 

 

-----Original Message-----
From: Shaun Epp <scepp@xxxxxxx>
To: tesla@xxxxxxxxxx
Sent: Mon, Feb 22, 2010 7:41 pm
Subject: [TCML] Toroid height, What's best


Hello Group,

Well I just bought a new toroid, It came by mail today.  I was wondering if I 
need to change its height relative to the top winding of my secondary, I assume 
that this changes the self capacitance of the secondary and flashover voltage, 
but I'm not sure.  Could some experts enlighten me.  Right now the bottom of the 
16" x 5" toroid is 1 inch above the top windings of my 4.25" dia secondary, and 
the secondary has 22.25 inches of windings.

It's too cold outside for me to run tests right now, I'll have to wait 1.5 
months for that to change.  But spring is coming :-))

thanks,

Shaun Epp

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