Jim Kelley wrote:
That
doesn't mean there's more current "going in one end" than is "coming out
of the other end." It's a sophomoric notion.

Nope, it's not, Jim. Current cannot stand still. The current at the bottom
of the coil is referenced to the source current which in EZNEC, is usually
one amp at zero degrees which, *by convention*, has the RMS value flowing
into the antenna. The same convention is used for circuit components.

EZNEC then tells us that the current at the bottom of the coil is 0.87a
at -1.23 deg and the current at the top of the coil is 0.67a at -1.57 deg.
All these currents are phasors. One amp at zero degrees is flowing into
the antenna. 0.87a at -1.23 degrees is flowing into the bottom of the coil,
by convention, because the cosine of the phase_angle is positive. 0.67a at
-1.57 degrees is flowing out the top of the coil, by convention, because the
cosine of the phase_angle is positive. All referenced to the source current
(you know, that little current arrow that you draw on a diagram to indicate
the RMS current flow).

What is a sophomoric notion is your notion that current doesn't flow when
it's associated with a coil. Does it just sorta vegetate around the ends
of the coil or what? If you were asked to draw RMS current arrows on a
diagram associated with a coil, would you say it can't be done? Why do
you think the RMS conventions were invented?

Incidentally, this concept of current into the coil and current out of the
coil was introduced by Tom, W8JI who said in the original argument: "If you
look at HOW an inductor works, the current flowing in one terminal ALWAYS
equals the current flowing out the other terminal." Even if Tom was wrong
about the equal currents, he clearly comprehends the AC current flow convention.
--
73, Cecil http://www.qsl.net/w5dxp



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