John KD5YI wrote:
If it IS true, then the point I tried to make that you are making a
distributed component from a lumped one is valid. That's what caused me
to object to your earlier post.

There are coils for which the lumped-circuit model
is valid.

There are coils for which the lumped-circuit model
is not valid.

I am only interested in discussing coils for which
the lumped-circuit model is invalid, i.e. coils that
are electrically longer than 15 degrees, e.g. a large
air-core 75m Texas Bugcatcher coil which measures
about 40 degrees on 4 MHz.

I honestly don't know if the lumped-circuit model
works for 70 uH toroidal coils. I do know it doesn't
work for a 75m Texas Bugcatcher coil.

The people who insist on analyzing tiny toroidal coils
instead of 75m Texas Bugcatcher coils are afraid of
the technical truth and it's easy to see why.
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com