Don't know on the calculations but yes the finite elements works very well.
My first on was made from 1mm wire I think and the last was an 8mm copper tubing affair on my DRSSTC.
The ones I am making now are stainless steel as I can buy the 4 bends and wind them together.
Sorry that doesn't really answer anything does it?
Cheers
Colin
Sent from my iPhone
> On 9 Jul 2014, at 23:30, "Derek, Extreme Electronics" <tesla@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> All,
> Top loads will tend to break out at a voltage related to their minor diameter.
>
> Adding a breakout point will lower this breakout voltage, but I'm sure we have all tried a breakout that was too small, the reduction in breakout voltage can be aparently very small indeed.
>
> We all try to make our toroids as smooth as possible and yet good results can be had from finite element toroids.
>
> To me, the above points to the field surrounding the torrioid smoothing out the "lumps", be it a small breakout, a screw head on the torroid or the coils of a finite element toroid.
>
> So ignoring the directional aspect of having a breakout point, How smooth to top load need to be and is there a formulae that states that a sphere of diameter x on top of a sphere of diameter y as a combination, will break out at a particular voltage?
>
> Am I right that the field smooths out imperfections?
>
> Many years ago there were a number of programs that would graphically (but only in 2D IIRC) show the field around an object. Are there any that are still (cheaply) downloadable?
>
> Sorry for the barrage of questions, but they are all related (sort of)
>
> Thanks
>
> Derek
>
>
> --
> Web:www.extremeelectronics.co.uk <http://www.extremeelectronics.co.uk>
> Twitter @ExtElec <https://twitter.com/ExtElec>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla