Re: toroid sizing

• To: tesla-at-pupman-dot-com
• Subject: Re: toroid sizing
• From: "Barton B. Anderson" <tesla123-at-pacbell-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Thu, 30 Mar 2000 20:38:36 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

>
> Original Poster: Fucian-at-aol-dot-com 
>  

Hi Matt, 

Well, I'm not sure why your thinking about returning the form. I can't imagine
it costing all that much. I still think you should reduce the size of the
toroid, but, go ahead and use something else instead of the toroid to get
streamers. Go ahead and try bowls. Try a globe or ball wrapped in alluminum
foil. Try to figure out what size surface area you can break out with. You
didn't state your cap size - if your primary is 11 turns of 0.25" Cu tubing,
then you need to have about 0.003uF cap (which is pretty small). Start with a
top load really small amd work up in surface area until you find the amount of
surface area that works well. Yes, you can use math, but you can also use trial
and error. There's nothing wrong with that. Get an idea of what you need, then
cut the toroid down to match. If at that point the tubing you have is
rediculous to use, then by all means, return it. But, if it can be used  - why
not use it. 

Bart 
>
>   
> Hi all,my coil is 3ich by 15inch wound with 24awg.the frequency is like 
> 475khz.im using a 9kv30ma the primary is 11 turns of copper tubing.my current
>
> toroid is 4inch diam.by about 15 inches long still in compressed form.i cant 
> get any streamers!i evenswitched over to a 15kv30ma and retuned.still no 
> diff.how do i get streamers?should i try and return it and get 2 small mixing
>
> bowls for the coil,or should i cut the ducting to a smaller lenght?key word 
> here is cutting,once cut,no refund! i have very little time left to work on 
> it.what am i to do?

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