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Old September 17th 08, 03:27 AM posted to rec.radio.amateur.antenna
Art Unwin Art Unwin is offline
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First recorded activity by RadioBanter: Mar 2008
Posts: 1,339
Default Equilibrium and Ham examinations

On Sep 16, 8:32*pm, "JB" wrote:
What, this is not the "Pulling Your Leg Festival?"


Damn, it appears I have caught the wrong door again! *Last time this
happened, it was a womens restroom, at walmart, no less :-( -- at least
this is less embarrassing ... grin


ROFLOL
I did that at a technical seminar in a hotel once. *I was pondering the
ramifications of the training and didn't even look at the door. *It wasn't
until the only woman there rushed in (probably preoccupied as well) and
plopped down and peed that it dawned on me that there was something very
very wrong!

In any case, Art seems to have trouble articulating and I have completely
lost touch with any sense he might have made somewhere in the great pile of
this thread.

I get that even though a resonant dipole can be treated as if it were a
lumped constant at times, it really isn't that. *Do electrons fly back and
forth down the pole and induce a magnetic field? *

No, they are generating a magnetic field when the current is at the
surface
which means eddy currents are also there. neither of these appear when
the current is enclosed

Without flying off the
ends? Yes but that is hard to make sense of because there should be no
current flow in an open wire.

The wire may be open but the current flow IS closed

*A loop element maybe, but the resonant loop
has the same current as the center fed dipole. *Perhaps looking at the
re-entrant cavity makes more sense.


John you are equating resonance with equilibrium, a dipole in antenna
terms is a half wavelength
resonant but not in a state of equilibrium. Equilibrium is a staple in
this Universe. First comes equilibrium
after which you may consider resonance.......but not the reverse. Both
of the samples are of a half wave length thus it is not in
equilibrium.
Equilibrium comes first in the satisfaction analysis, if it fails all
falls apart.
Best regards
Art