Cecil Moore wrote:
John Popelish wrote:

Dang! I was looking forward to your test results, and a description
of your test method. I think your 2" diameter coil is a good example
of an inductor that is neither a perfect "lump" nor a pure
transmission line.


That's what my back of the napkin calculations would indicate.
I get ~14 degrees at 1.9 MHz or ~28 degrees at 3.8 MHz based
on 90 degrees at 12 MHz.

But based on what these guys measured before, anyone would be
a fool to predict the results without knowing what the test
setup looks like. In fact, the prediction challenge was a
blatently obvious attempt to lead the unsuspecting down
a primrose path without a roadmap. Do you think W7EL would
ever make a prediction based on the meager amount of
information provided? :-) A few years ago he provided some
information but kept changing parameters daily until I got
tired and withdrew my estimate. But it turned out in the
end that I was pretty close.

Predictions are little more than an ego trip, unless they are a test
of a specific calculation method used for the prediction. But I was
willing to wait for the test result and an after the fact description
of the test method, to see what understanding might be teased out that
combination of facts. The discussion might also have lead to a better
way to perform such a test.

Baby steps.