On Sat, 06 Dec 2003 13:09:02 -0800, Bill Turner wrote:

On Sat, 06 Dec 2003 18:39:18 +0000, Paul Burridge
wrote:

As you may know, the inductance of a coil is not a fixed value, but
varies dramatically with frequency.

Er, you mean *reactance* of a coil varies dramatically with frequency,
don't you?

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Er, no I don't. They both vary with frequency.

If the inductance did NOT vary with frequency, the X sub L vs F plot
would be linear. In reality, it is anything but linear.

X sub L is inductive reactance, yes that varies with freq.
L is the fixed value inductance.

though there is some parasitic capacitance between windings that does effect the
resonant freq. a bit. www.coilcraft.com gives guidelines to this.





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