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Re: top load height
Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>
Yes, JAVATC uses the center line for topload heights. When I use the
program defining topload heights, I use the cells math function (each
cell can be used as a calculator). For example, if the top sec
winding height is 40" and the toroid is 4" x 12", I would insert into
the cell 40+2+3 where 40 is the sec top height, 2 is one-half of the
cord, and 3 is the height from the top of the secondary to the bottom
of the toroid. As soon as I click out of the cell, the cell
automatically calcs to 45 and will graphically display the correct
height ratio for the coil. You can model up to 10 toroids (although
that is slightly ridiculous).
For the center disc of a toroid, use the disc topload input. The disc
for the above 4x12 toroid would be (od/(2xid), so the disc size would
be 12/8=4. I do all the math in the cells, as a matter of fact, I'm
too lazy to do even that example in my head, so I enter 12/(2*4) and
let the cell do the calcs. The center height would be 45 (the same as
the toroid) in most cases. If you have a toroid with a disc on each
end, just enter both discs dimensions and heights. If you ever want
to know what math commands can be used in a cell, just enter a . into
any cell and the commands will popup.
The disc input can also be used for strike ring analysis on the
system. The id would be the diameter of the inner edge of the ring,
the od would be the outer edge, and of course the center height would
be the height of the ring from the ground. But also, be sure to click
the "grounded" checkbox (because the ring is at RF ground). See,
there is a reason for that checkbox <grin>.
Tesla list wrote:
Original poster: "resonance" <resonance@xxxxxxxxxxxx>
The base would be the lowest part of the toroid. The center is
referred to in Bart's JAVATC program as the "centerline" of the torus.