Re: Toroid size selection

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

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


For efficient operation you need a toroid of 2.0 to 2.5 times the sec
coilform dia.   With your specs a nice 24 x 6 or 20 x 5 inch toroid would
work very well.

Your .0214 cap selection sounds very close to a resonant match with your
transformers impedance.  You might go up to 1.6 x the transformers impedance
to prevent unwanted potential resonant rise which could blow your xmfr.  You
might try .03 to .035 value to keep above this undesireable range.

This will also provide more energy for pri-sec transfer.

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, January 10, 2004 8:41 PM
Subject: Toroid size selection


 > Original poster: "Luke" <Bluu-at-cox-dot-net>
 >
 > I just joined the group and this is my first post.
 > I have played with TC's bout 12 years ago and my last one took up too much
 > room for me at the time so I dismantled it.
 > I have regretted it since.  So now its time to make another.
 >
 > My question is what is the best method / formula for selecting a toroid
 > size?  And why?
 > Various opinions and methods would be appreciated so I can get an over all
 > view of what everyone thinks.
 >
 > I will be using 2 NST's in parallel each rated at 15KV 60mA.  For a total
 > of 1800 watts.
 > The capacitance I have chosen is 0.0214 micro farads.
 > I will be winding a coil with a diameter of 8 inches and a 36 inch coil
length.
 > How do I go about figuring out the best size toroid with the above
information?
 >
 > Thanx.
 >
 > Luke Galyan
 > Bluu-at-cox-dot-net
 >
 >
 >
 >