[Prev][Next][Index][Thread]
Re: Top Toroid
Tesla List 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
>
> >Subscriber: rhull-at-richmond.infi-dot-net Thu Jan 30 22:56:39 1997
> >Date: Thu, 30 Jan 1997 18:27:28 -0500 (EST)
> >From: richard hull <rhull-at-richmond.infi-dot-net>
> >To: tesla-at-pupman-dot-com
> >Subject: Re: Top Toroid
> >
>
> >I trust these are calculated values!!! I can almost tell due to the fact
> >they are all in error from real world, honest to God, measured values. A
> >true, relative isolated toroid is usually about 25-30% lower in capacity
> >than the calcs say it is. My 12X3 spun unit is 7.8pf and my 5X20 is 15.1
> >pf. put them on a coil and they can appear to be even more than calculated!
> >It's a crap shoot! The thrust is that the math isn't even close for any
> >form of critical engineering purposes. Especially on small toroids.
> >
> 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
Hi Jim
Did you wipe off the dirt and dust from the toroid? This can be a major
cause of premature breakout
Skip