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Re: [TCML] Toroid thickness effects
In general, larger major diameters provide more capacitance while larger
minor diameter means a somewhat higher breakout voltage due to larger radius of
curvature. Since your major diameters are so close, I think the 5 x 15 would
give you slightly better performance.
For a quick calc of a isolated toroid, (NOT Gospel) you can use:
where D is the major diameter in inches and d is the minor diameter in
You can plot C by D by d in 3-D and get a feel for how the proportions
interact even with the primitive plotting tools in Excel.
Unfortunately, there isn't a quick & dirty calculation of hold-off voltage
vs D & d, although I'll bet someone on the list probably has done it.
Hope this helps
On Wed, Jun 11, 2008 at 4:17 PM, b alex pettit jr <a_pettit_jr@xxxxxxxxx>
> Hi All,
> For my 12/60 NST powered 4"x 20" coil
> I have an option for purchasing either
> a 16"x 3" or 15"x 5" at the same cost.
> What would be the difference in performance
> between these ?
> Alex P
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