Richard Harrison wrote:
Roy, W7EL wrote:
"I don`t see the connection between these and the contention that the
current into and out of an inductor are unequal."

Nor do I. Tom was not making a case for inequality of current in and out
of a coil either. He was just making an inaccurate statement.

What was the inaccurate statement he made? I've found Tom very willing
to correct errors, so I'm sure he'll correct it if we point it out to him.

Cecil has a good case. Straight wire and coiled wire have the same
properties, only more or less of them. When they are in the path of a
traveling wave and a reflection of that wave comes back from the
opposite direction, they respond similarly. An interference pattern
exists on the coil as it does on straight wire if the distance is
comparable to a wavelength.

Which distance do you mean -- the length of the coil or the length of
the wire?

Superpositon makes both volts and amps vary
along the route.

So, indeed the current at one end of a coil in that situation can be
different at from that at the other end, the same as it would along a
wire.

Yes, indeed. As I explained in several earlier postings, if you begin
with a coil and slowly stretch it out, the current distribution will go
from something resembling that of a lumped inductor (equal currents in
and out) to that of a straight wire (sinusoidal distribution). So "a
coil" can have any current distribution along that continuum, allowing
us to "prove" just about anything we wish as long as we don't say what
kind of coil we're talking about. In between the extremes, a third
distribution can occur, as King described in his book: when the coil
length is much less than a wavelength but the turns are loosely coupled,
you get a current that's highest in the middle and lower at both ends.
The disagreement regards the currents in what would qualify as a lumped
inductor -- one with very good coupling between turns, coil length very
short in terms of wavelength, and no significant coupling to other
conductors, but regardless of the length of wire it's made of. For that
case, it's been theoretically and demonstratively shown to be equal at
both ends.

Distributed network theory is newer than lumped network theory but both
have been around plenty long enough to be well established. I don`t
think Cecil is breaking any new ground.

His conclusions are sure new and different, and unlike established
theory, his theories don't seem to be subject to equations which
describe them quantitatively.

Roy Lewallen, W7EL