Loading Coils; was : Vincent antenna
 

Cecil Moore wrote:

A loading coil is not an ideal
transmission line and its "current maximum" is not
caused by standing waves.

It's probably true that ideal transmission lines don't exist in any
form. The standing wave in question has both a minimum AND a maximum,
whose locations are determined by the relative phase and amplitude of
the forward and reflected waves at each position.

The "current maximum" in
the coil is caused by adjacent coupling between the
coils and does not occur at a purely resistive point.

How do you propose that this occurs without having an effect on the
forward and reflected waves which comprise the standing wave?

Although not shown, the
voltage at the current maximum in the coil is not
in phase with the current so in this case, the
"current maximum" is not a pure resistance, is
not the current anti-node point, and is not the
resonant point. The current at the bottom of the
antenna is in phase with the voltage and the feedpoint
impedance is purely resistive.

It would be better if you provided some sort of demarcation between
the well known facts and the pensive speculation in your posts. :-)

The coil puts a hump in the current which causes
the current envelope to deviate from sinusoidal.

What does the IEEE dictionary have to say about 'current humps' I wonder.

73, ac6xg

Loading Coils; was : Vincent antenna
 

Richard Clark wrote:
It would be intriguing to discover how your rig drove 5W through the
coil to a 48:1 mismatch.

I already reported more than a year ago that it was
through an autotransformer. I matched the coil Z0
on both the source end and the load end.

I have no doubt that if you catch me in a misspelled
word, you will pounce on it and say it proves my
measurements were invalid. That's what nonsense
we have come to expect from you.
--
73, Cecil http://www.w5dxp.com

Loading Coils; was : Vincent antenna
 

Jim Kelley wrote:
How do you propose that this occurs without having an effect on the
forward and reflected waves which comprise the standing wave?

It obviously has an effect on the standing wave. In no
way can Wes's current waveform be called a cosine function.
However, we know that the current and voltage are in
phase at the feedpoint and at the tip of the antenna.
It is impossible for them to be in phase anywhere else.

It would be better if you provided some sort of demarcation between the
well known facts and the pensive speculation in your posts. :-)

It's all simple physics, Jim, aided by a measured IQ of 168.
--
73, Cecil http://www.w5dxp.com

Loading Coils; was : Vincent antenna
 

On 6 Dec, 13:50, Cecil Moore wrote:
Jim Kelley wrote:
How do you propose that this occurs without having an effect on the
forward and reflected waves which comprise the standing wave?

It obviously has an effect on the standing wave. In no
way can Wes's current waveform be called a cosine function.
However, we know that the current and voltage are in
phase at the feedpoint and at the tip of the antenna.
It is impossible for them to be in phase anywhere else.

It would be better if you provided some sort of demarcation between the
well known facts and the pensive speculation in your posts. :-)

It's all simple physics, Jim, aided by a measured IQ of 168.
--
73, Cecil http://www.w5dxp.com

Ouch Cecil, I think you need to come down a bit!
We are not prehistoric mammals when compared to what you
perceive your self to be. Do you really want to be a clone of Roy
where you can flout yourself as superior to all?
You have had your fun with all those wave things that
you have foisted upon others but rubbing it in regarding
how clever you are compared to other mortals will not
allow anger that has festered to decline.
Art

Loading Coils; was : Vincent antenna
 

art wrote:
Ouch Cecil, I think you need to come down a bit!

My nephew, who is also a member of MENSA, recently
went to a job interview. On his resume, he listed
his MENSA membership. The interviewer, who would
have been his future boss said, "You're a member
of MENSA? You want my job, don't you?" My nephew
took the MENSA line off his resume. :-)
--
73, Cecil http://www.w5dxp.com

Loading Coils; was : Vincent antenna
 

Cecil Moore wrote:
Jim Kelley wrote:

How do you propose that this occurs without having an effect on the
forward and reflected waves which comprise the standing wave?


It obviously has an effect on the standing wave.

Obviously. The question is, how to reconcile that fact with your
statement:

"A loading coil is not an ideal
transmission line and its "current maximum" is not
caused by standing waves."

A current maximum would obviously be a prominent feature of standing
waves resulting from the superposition of forward and reflected currents.

In no
way can Wes's current waveform be called a cosine function.

Wes who?

However, we know that the current and voltage are in
phase at the feedpoint and at the tip of the antenna.

Assuming it's a resistive antenna, assuming we're talking about
forward current. What other assumptions are we missing?

It's all simple physics, Jim, aided by a measured IQ of 168.

;-) There.
Among the things evidently manifested by an alleged "IQ of 168" are a
narcisitic overestimate of ones own abilities and a compulsive need to
demonstrate same.

What does "its current maximum is not caused by standing waves" mean
to someone with an "IQ of 168"?

ac6xg

Loading Coils; was : Vincent antenna
 

Cecil Moore wrote:

My nephew, who is also a member of MENSA, recently
went to a job interview. On his resume, he listed
his MENSA membership. The interviewer, who would
have been his future boss said, "You're a member
of MENSA? You want my job, don't you?" My nephew
took the MENSA line off his resume. :-)

Let him know that Star Trek Fan Club membership isn't something to
brag about either. :-)

ac6xg

Loading Coils; was : Vincent antenna
 

Cecil Moore wrote:

...
My nephew, who is also a member of MENSA, recently
went to a job interview. On his resume, he listed
his MENSA membership. The interviewer, who would
have been his future boss said, "You're a member
of MENSA? You want my job, don't you?" My nephew
took the MENSA line off his resume. :-)

Yes, I have seen it time and time again ... people are fired for
proficiency, IQ, skills, warm personalities, etc. I have seen gifted
individuals sabotaged, setup, conspired against, etc. Has made me very
slow to react on job performance evaluations given by others on an
individual(s.)

The idiots of the world have a mission and a lot at stake, they will
"kill" competition on sight! This is used as a strong "survival skill"
by them ... convince the nephew that there is a lot to be had by
"dummying up" at the correct times and places.

Sometimes you wonder if this is not the major force at work in large
corporations?

Regards,
JS

Loading Coils; was : Vincent antenna
 

On Dec 6, 5:19 pm, Jim Kelley wrote:
Among the things evidently manifested by an alleged "IQ of 168" are a
narcisitic overestimate of ones own abilities and a compulsive need to
demonstrate same.

What does "its current maximum is not caused by standing waves" mean
to someone with an "IQ of 168"?

ac6xg

IQ doesn't mean a whole lot to me.. I've also been tested in
the same appx 160+ range.. Big deal.. I'm still basically a redneck
dumbass because I never applied myself much in school.
I hated school actually, and snuck away every chance I got... :/
I sure never had any interest in trying to join Mensa.
What do Mensa groups do anyway? I'm fairly sure whatever they
do would be boring to me... :(
MK

Loading Coils; was : Vincent antenna
 

wrote in message
...
On Dec 6, 5:19 pm, Jim Kelley wrote:
Among the things evidently manifested by an alleged "IQ of 168" are a
narcisitic overestimate of ones own abilities and a compulsive need to
demonstrate same.

What does "its current maximum is not caused by standing waves" mean
to someone with an "IQ of 168"?

ac6xg

IQ doesn't mean a whole lot to me.. I've also been tested in
the same appx 160+ range.. Big deal.. I'm still basically a redneck
dumbass because I never applied myself much in school.
I hated school actually, and snuck away every chance I got... :/
I sure never had any interest in trying to join Mensa.
What do Mensa groups do anyway? I'm fairly sure whatever they
do would be boring to me... :(
MK


I went along to a couple of meetings many years ago. Full of under achievers
with high IQ's complaining how they weren't being recognised or credited in
their exams/career/promotion ladder/etc.

You can coast along with a high enough IQ without having to work too hard,
but it takes hard work and dedication to achieve anything worthwhile. The
top people anywhere in the world are not the smartest, but they learned to
use what they have to the maximum and put the hours in. If you expect a high
IQ to grant you a short cut to the top, it won't and there are a whole lot
of only slightly less intelligent people who know just enough and have a
vested interest to stop you from getting there.

Mensa is merely a self congratulatory society for smart people who lack the
drive to succeed. But don't let that stop you from joining so long as all
you expect is the chance of some (reasonably) intelligent conversation at
social functions.

Well it didn't match up to my standards (or the intelligence that is
displayed on r.r.a.a.) so I didn't bother renewing my subscription when it
expired.

Cheers all,

Mike GOULI