Roy,
please see my other posting, otherwise, I really promise to do the step by
step article, which will try to explain, correlate real life measurements
and modeling and present the comprehensive case of current being different
across antenna loading coils. Will do that with cooperation of other
"defenders" that contributed to "our" cause. There is no point of going back
and forth on tangents. We will measure, show the reality and then apply some
theory, explanation and summary of what is going on.
I hope it will correct misconceptions, provide better understanding and
benefit in proper modeling and design of loaded antenna elements and
systems.
Otherwise, I think we have reached point, when it is pointless to go around
in circles and argue that what IS, CAN'T BE, because.....


Yuri, K3BU




"Roy Lewallen" wrote in message
...
Of course loading coils can be expressed in electrical degrees. But
extrapolating this to mean that a loading coil has the same properties as
an antenna with the same number of "degrees" has no justification.

Yuri's theory was shown to be false not only by many of the good technical
arguments given here in this thread, but also by a careful measurement I
made over a year ago. I built a 33 foot high vertical and loaded it at the
bottom with a toroidal inductor to resonate it at 3.8 MHz. The coil
"replaced" 33.4 electrical degrees of antenna. Yuri's theory predicts that
the current at the top of the inductor should be 16.5% less than that at
the bottom, with a phase shift of 33.4 degrees. What I measured was a
current drop of 5.4% and no measurable phase shift across the inductor.
Both the description of the setup and the detailed results were posted on
this newsgroup on Nov. 11, 2003, with the subject title " Current in
antenna loading coils controversy - new measurement". Anyone can find
those postings with groups.google.com.

Yuri's response, also on Nov. 11, 2003 was to complain about my
methodology, declare that he was still right, and state "I will measure
things myself, try to verify previous measurements and then come up with
conclusions and 'theory'."

On Nov. 12, 2003, he posted: "I will be making snap-on current probe,
which will make it easier to slide along the element and observe the
current without the disturbance to the antenna and will be a bit different
over the thermocouple meters. Just need a bit more time."

Well, it's been over a year now, and all I've seen is the same unsupported
theory with no evidence to contradict the contrary evidence which has been
presented.

When a belief stays fixed in spite of both contradictory solid theory and
measurements, it fits into the category of religion, not science. So it's
appropriate that Yuri speaks in terms of an explanation being a "heresy".
What's next, "good" and "evil" theories?

Roy Lewallen, W7EL

Yuri Blanarovich wrote:
W8JI and other unbelievers that antenna and loading coils can not be
expressed in electrical degrees, can find another example in ON4UN's Low
Band DXing book, 4th edition, page 9-47, Fig 9-58, showing loaded
vertical with mast being 40 deg. 59.6 ft. long, loading coil of 144 uH
taking (replacing radiator of) 40 deg and whip of 10 deg and 14.9 ft
long, for overall 90 deg electrical and quarter wave resonant system.
Soooo, to anyone outside of "equal current worshippers" it is obvious
that coil is replacing 40 deg worth of radiator and it would drop
equivalent amount of current across the coil that corresponds to the
length of radiator that coil replaces, because rest of the "straight"
radiator FORCES IT TO DO - because of standing wave and current.

Such a heresy!
Theeere is your sign!

Yuri, K3BU/m