Mark Keith wrote:

Cecil Moore wrote in message

I *don't* expect such a coil to simulate reality. That's the whole problem.
The artificial lumped load software doesn't match reality. It only
approaches reality for "physically small" coils. Once again, a 75m Texas
Bugcatcher coil is not physically small.

It's physically small enough that any error should be small. IE: 1 db
or less.

A 13% error is small? The error is even larger than that for the current
at the top of the coil.

If the coil position does not effect the current taper going "one
way", I don't see how it would coming back the other way. Regardless
of coil position.

The forward current and reflected current phasors rotate in opposite
directions. Sometimes they are in phase and sometimes they are out
of phase. In a lossless transmission line, the forward current and
reflected current are absolutely constant with zero taper. Yet they
still result in standing waves with minimum and maximum points. This
is explained on my web page.

Seems to me, if this is
true, there should be a position that places maximum current at the
top of the coil, not bottom.

I have already said multiple times, depending upon where the coil is
placed, the net current into the coil can be less than, equal to, or greater
than the net current coming out. It all depends upon the phasor sum of the
forward current and reflected current. It can be zero or maximum or
anything in between depending upon where the coil is placed. For Kraus'
phase-reversing coil, the net current is zero at both ends and maximum
in the middle of the coil.
--
73, Cecil http://www.qsl.net/w5dxp/current.htm



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