Re: Alternate toroid shapes

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Harold Weiss" <hweiss-at-new.rr-dot-com> 

Hi All,

I have considered the "mushroom" to be the best of both worlds, of torrid
and sphere.  They might also be a little cheaper to have spun.

David E Weiss


 > Original poster: "BrianB" <brianb-at-antelecom-dot-net>
 >
 > Jon,
 >
 > My personal observation is a half-toroid bottom with a half-sphere top
 > accomplishes the best field shaping to protect the secondary while
 > allowing the arcs to start at the edges then dance all the way up to the
 > top (due undoubtedly to thermal effects). There might also be a small
 > performance increase due to the reduced ROC but I haven't made accurate
 > measurements.
 >
 > By grid dipping one can see a tiny increase in C-top but it's not enough
 > to affect tuning on most machines.
 >
 > If anyone wants to try this there is a quick and easy way. Just bend up
 > a piece of chicken wire in the shape of a half-sphere and place it on
 > top of your toroid. Cover it with some Al foil if you want it to be
 > smoother and stick the edges down with Al tape.
 >
 > Regards,
 > Brian B.
 >