Richard Clark wrote:
Not valid is quite different from invalid.

What is your native language? :-) From Webster's:
"in - a prefix ... having a negative force"

Seeing that
Cecil wholeheartedly has yet to reveal the how (or data to the same
precision) of his own counter experiment (which I have also gone on
record in asking for details) - I don't expect anything there either.

Good grief, Richard, I posted a detailed description of those
measurements more than a year ago before I moved to my new QTH.
In words, with a 50 ohm source, set up an autotransformer to
deliver a signal to a 3600 ohm Z0 environment. Put the 75m Texas
Bugcatcher coil in series with a 3600 ohm non-inductive load.
Measure the phase shift through the coil at 4 MHz. I eyeballed
it at ~25 degrees on a dual-trace 100 MHz O'scope.
--
73, Cecil http://www.w5dxp.com