Re: Top Toroid

• To: tesla-at-pupman-dot-com
• Subject: Re: Top Toroid
• From: richard hull <rhull-at-richmond.infi-dot-net>
• Date: Sat, 1 Feb 1997 09:05:08 -0500 (EST)
• Subscriber: rhull-at-richmond.infi-dot-net Sat Feb 1 21:37:42 1997

At 11:16 PM 1/31/97 -0700, you wrote:
>Subscriber: jim.fosse-at-bdt-dot-com Fri Jan 31 23:11:00 1997
>Date: Sat, 01 Feb 1997 03:21:50 GMT
>From: Jim Fosse <jim.fosse-at-bdt-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: Top Toroid
>
>
>
>
>All,
>	Does any one have voltage holdoff vs radius of curvature
>values or formulas for toroids? Or suggestions for ROC vs power level?
>
>I'm asking because I've bought my TC back on line and I only getting
>2' air discharges from the toroid. WHAT you say! Only 2' discharges?
>Yes but, there are about a dozen at once. I'm using a 15kV 60ma
>transformer, 16nF primary cap, 120uH inverted cone primary, 8" by 20"
>#22 secondary and a 27" by 3" toroid. The resonant frequency
>(instrument measurement) is 133kHz.
>
>Any suggestions for a toroid major and minor diameters for this?
>
>	Regards,
>
>	jim

Jim,

You are in the ball park of normal operation of one 60 ma transformer!  It
sounds like you are breaking out too soon.  Probably due to a short radius
of curvature on the 3" minor axis toroid!  That's a big secondary for for
that one little neon xfrmer!  The .016ufd cap is also a bit big for the
transformer.  It sounds more like early breakout though with multiple 2
footers.  Try a smaller diameter, fatter toroid.

Richard Hull, TCBOR
>
>

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