Bill Turner wrote...

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.

We're talking a small air-coil here. As SRF is approached the
reactance does depart from the expected linear plot, but that's
because one should have considered X_C as well. Say, you're not
talking about an exotic high-frequency region where the physical
diameter of a coil may drop slightly due to proximity effect?
Sheesh!

Thanks,
- Win

whill_at_picovolt-dot-com