Posted by
Jim Brown-10 on
Aug 30, 2005; 9:18pm
URL: http://elecraft.85.s1.nabble.com/RE-OT-Effect-of-Compression-and-Expansionon-the-Inductance-of-Toroids-tp381632p381637.html
I disagree. I think you are probably observing the change in capacitance. I
agree that the higher frequency components associated with the square wave
rise time is the measurement excitation.
Jim
On Tue, 30 Aug 2005 10:00:23 -0700, Ron D'Eau Claire wrote:
>Jim wrote:
>Yes, if the measurement is made at a sufficiently low frequency, Xc is
>insignificantly low.
>---------------------------
>The measurement is made at H.F. I'm sorry, I apparently confused the issue
>by saying the applied square wave was at 60 kHz. That's NOT the measurement
>frequency. The edges of the square wave include components extending through
>the H.F. range, at least. The inductance is measured directly by noting the
>effect it has on the edges of the square wave.
>The advantage of that system is that it measures the inductance directly.
>And a shift in the inductance of about 9% was observed by scrunching the
>turns together.
>Ron AC7AC
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