View Single Post
  #142   Report Post  
Old April 7th 06, 04:16 PM posted to rec.radio.amateur.antenna
Cecil Moore
 
Posts: n/a
Default Current across the antenna loading coil - from scratch

"Yuri Blanarovich" wrote:
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, I think it is obvious that some people are suffering from
misconceptions.

The misconception that the "experts" are suffering from has *nothing* to do
with coils. That's the reason the coil discussion has gone in circles. There
may not be anything wrong with the coil concepts.

The misconception is about standing wave current VS traveling wave current.
The "experts" have asserted that "current is current" and that standing wave
current is the same as traveling wave current even though they have
different
equations. Even EZNEC recognizes the difference between standing wave
current and traveling wave current. I took a quarter wavelength of wire and
drove it as a standing wave wire and as a traveling wave wire. The piece
of wire was identical in both cases. I've posted the EZNEC results a
number of times and none of the "experts" have responded. Here they are
again: The corresponding EZNEC files are available at:

http://www.qsl.net/w5dxp/TravWave.EZ I(x,t)=Io*cos(kx+wt)
http://www.qsl.net/w5dxp/StndWave.EZ I(x,t)==Io*cos(kx)*cos(wt)

% along current in current in
wire #2 TravWave.EZ StndWave.EZ

0.28% 0.9998 at -0.99 deg 0.9996 at 0 deg
9.72% 0.9983 at -9.39 deg 0.9843 at -0.03 deg
19.7% 0.9969 at -18.23 deg 0.9454 at -0.05 deg
30.3% 0.9957 at -27.59 deg 0.8843 at -0.06 deg
39.7% 0.9949 at -35.96 deg 0.8023 at -0.08 deg
49.7% 0.9945 at -44.84 deg 0.7014 at -0.09 deg
60.3% 0.9945 at -54.20 deg 0.5840 at -0.09 deg
69.7% 0.9949 at -62.58 deg 0.4528 at -0.10 deg
79.7% 0.9956 at -71.43 deg 0.3110 at -0.11 deg
89.7% 0.9965 at -80.27 deg 0.1616 at -0.11 deg
99.7% 0.9976 at -89.14 deg 0.0061 at -0.11 deg

These values reported by EZNEC are graphed at:

http://www.qsl.net/w5dxp/travstnd.GIF

Their differences are obvious. One might even argue that they are
opposites. The traveling wave magnitude looks like the standing
wave phase. The traveling wave phase looks like the standing
wave magnitude. That fits perfectly with Gene Fuller's assertion
that there is no phase information in standing wave current phase.
The only phase information in the standing wave current is in the
magnitude. Once the "experts" realize that is the source of their
misconception, everything will fall into place.

Again, it is NOT about coils. It is all about misconceptions
involving standing wave current.
--
73, Cecil, W5DXP