wrote:
I already posted, years ago, measurements at:
http://www.w8ji.com/mobile_antenna_c...ts_at_w8ji.htm
Those are RMS standing wave measurements. To see what is wrong
with using RMS standing wave measurements please see:
http://www.qsl.net/w5dxp/travstnd.GIF
I think what is happening here is you are getting angry and not paying
attention to what people are saying. I've already said it is possible
to have different currents at each end of a loading coil.
And there phase information in those standing wave current
magnitudes. There is no phase information is standing wave
current phase.
What I disagree with you about is you seem to attribute that difference
to some magical property related to the distribution of current based
on electrical degrees the loading coil replaces or standing waves, and
that is very simply and clearly wrong.
No, it is your misconceptions about standing wave current
that are very simply and clearly wrong.
Current cannot "drop" or be "dropped".
RF current drops with the attenuation factor, just like RF
voltage does. Clinging to the lumped circuit model
presuppositions is what causes you to make silly assertions
like the above. Standing wave current periodically drops
to zero in unterminated transmission lines.
The single thing that allows an inductor to have a current difference
and phase shift in current along the coil or at each terminal is the
capacitance of the coil to the outside world.
Is capacitance to the outside world also what allows a wire
to have zero current at one point and two amps of current
90 degrees away. Of course not! The degrees of delay through
the coil is primarily responsible for the difference in
current. That, and where it is places on the standing wave
current curve.
You have to include displacement currents in any model, or you cannot
have a current taper along the length of a conductor.
We are talking about displacement current to earth ground and
there is zero displacement current to the outside world ground
yet there's SWR current taper on coaxial transmission lines.
Maybe it's time for you to learn how to add phasors?
Sure. His explanation of what is happening and the fact he picked a
very special conditions just to satisfy a twisted theory. Roy showed in
his models why Cecil's conclusions were wrong. Practical measurements
will show the same thing.
Roy used standing wave current phase to try to measure the
delay through a coil. That's an invalid measurement. None of
my conditions are special. They just seem special to your
lumped circuit model. The distributed network model works
for all conditions.
--
73, Cecil
http://www.qsl.net/w5dxp