The toroid formulas are approximations, but good ones. Here is a
physics-based explanation that gives some of the complexities, but there
are literally books on inductors.
http://tinyurl.com/9brxb
Leigh / WA5ZNU
On Mon, 29 Aug 2005 3:52 pm, Darrell Bellerive wrote:
Well, it seems now that I am receiving contradictory information.
Specifically
that compressing the turns on a toroid will raise the inductance.
What is the real scoop. Does compressing or expanding the spacing of
the
winding on a toroid change the inductance? Or just the distributed
capacitance of the toroid? Or is this much more complex than I would
have
expected?
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