Re: doubled up toroids

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Mddeming@xxxxxxx 

In a message dated 3/30/06 9:16:40 A.M. Eastern Standard Time, 
tesla@xxxxxxxxxx writes:
Original poster: "MakingLightning" <MakingLightning@xxxxxxxxxxx>


I see a lot of people using a toroid on top of a toroid to help prevent
spark jumps to the secondary.

I have 2 questions about this.

1). Does this really work?

2). If let's say you have calculated out that you need an 8x24 toroid, what
size toroid would you use if you were to use the 2-toroid setup and how
would you determine or calculate that?

Kevin M. Conkey



Hi Kevin,

    The shape of the field around a Tesla coil is greatly affected 
by the shape of the topload. A double toroid will tend to influence 
streamer formation to be at or somewhat above the horizontal plane of 
the topload, if the larger one is on top. Terry's Etesla program 
produces an output file that can be used to plot the field shape 
around a coil. If the capacitance of the toroids are Ca and Cb then 
as a first approximation, Cequiv. ~ 1.4(Ca+Cb). This will get you in 
the ballpark, but which exact values will give you the best results 
requires a complicated theory called fiddle, diddle, and try-it.

Matt D.