Re: top load height

["Tesla list" <tesla@xxxxxxxxxx>]

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>.

Take care,
Bart

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.
>
> Dr. Resonance