On 8/25/2010 11:09 AM, amdx wrote:
Several years ago while making inductors for tuning a class E amplifier we
end up with a 4-1/2 turn inductor. The inductor used a 3F3 potcore, gapped I
think,
but it has been awhile. The inductor was driven hard but below saturation.
The problem; the 1/2 turn got HOT. Four turns or five turns were ok.
My physicist friend had an EE verify the problem 2000 miles away.

So, can anyone tell me why 1/2 turn would make such a difference in the
heating?

Thanks, MikeK



This kind of odd-ball result can be caused by "parasitics" - in other
words, a high overtone excited by just the right length of inductor
paired with just the right stray capacitance, and energized by something
that can hit the high notes....

Brian W