"Cecil Moore" wrote
So what would you call the frequency at which a coil alone
is resonant when mounted as a base-loading coil over a
ground plane?
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Cec,

I would call it the frequency at which the coil alone is resonant when
mounted as a base-loading coil over a ground plane.

It would depend on whether the ground plane was a bicycle or the deck
of a super-tanker.
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Reg.