On 1/22/15 5:26 AM, Tim Flood wrote:
Yes, just be sure the total surface area of all your tubes is close to
the
surface area of the toroid.
Tim
On Thu, Jan 22, 2015 at 8:10 AM, Jim Lux <jimlux@xxxxxxxxxxxxx> wrote:
On 1/22/15 12:30 AM, JoeBonanno wrote:
this is an interesting thread!
i have to build my own in a few week! For calculating the final
capacitance
i can use the same formula of solid one? right?
That's what I would do. Short of using a finite element tool of some
sort.
Well.. I would think that the charge on the surface of the tubes that is
"inside" the toroid would be less than the charge on the outside, so on
a surface area basis, maybe 1/2 the sum of the tube circumferences might
be a better approximation.
Greg Leyh's Electrum had a tube topload in the shape of a sphere. The C
of a solid sphere is easy to calculate, and if Greg ever measured the
tube top load C, we could calibrate with that.