On Fri,7/31/2015 6:15 AM, Jim Lux wrote:
A quick run through Wheeler's equation says that a 3" diameter coil 2"
long with 18 turns (basically closewound) will be 21.8 uH
[L (mh) = (R^2 x N^2) / 9R + 10B]
Thanks, Jim. All comments appreciated. Do you know of any good
calculators online that run through the equations for single layer coils
like this? N6BV pointed me to http://www.zerobeat.net/G4FGQ/ which
yielded a DOS program called SOLNOID3.EXE that computes things like
self-resonance, dissipation, and so on. I had to resurrect an old
computer to run it. Many years ago, I wrote a QPro calc for the classic
equations in the Handbook, which I found to correlate nicely with what I
built.
73, Jim
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