The complete text referenced here can be accessed at:

http://eznec.com/misc/food_for_thought/

The first one is "Forward and reverse power" and is much
easier to read if it is copied-and-pasted into Word.

The first comment is just a nit: "(the current isn't
transformed by the half wavelength line either.)"

A 1/2 wavelength of transmission line reverses the
phase of the current, certainly a 180 degree
"transformation".

The main point centers around this false statement:
"While the nature of the voltage and current waves when
encountering an impedance discontinuity is well understood,
we're lacking a model of what happens to this "reverse power"
we've calculated."

Absolutely false! We are not lacking a model. We have time-
tested models that people with closed minds simply refuse to
consider. One such model is the s-parameter analysis presented
in HP's App Note 95-1, available on the web. Quoting: "Another
advantage of s-parameters springs from the simple relationship
between the variables a1, a2, b1, and b2, and various *POWER
WAVES*. ... s-parameters are simply related to power gain and
mismatch loss, quantities which are often of more interest
than the corresponding voltage functions." (emphasis mine)

The model is there. Concrete brains refuse to take a look
and instead call it "gobbledegook" (sic).

There's another model that agrees 100% with an s-parameter
analysis and it is from the field of optics, covered in
detail in _Optics_, by Hecht. Non-glare glass works the same
way as a 1/4WL matching section in a transmission line.
Again the model is there, just ignored by gurus on this
newsgroup which leads to demonstrably wrong conclusions
on their parts.

What happens to the energy in EM light waves
has been known and understood for many decades and cannot
be understood without an understanding of the laws of physics
governing interference between EM waves. Likewise, what happens
to the energy in EM RF waves cannot be understood without an
understanding of those same laws of physics.

There are many posters to r.r.a.a who have no clue about the
laws of physics governing interference between EM waves. That
ignorance is the entire problem with this discussion. Solution:
Alleviate the ignorance.

Quoting again from Roy's web page:
'ANY MODEL PRESENTED TO ACCOUNT FOR WHAT HAPPENS TO "FORWARD" AND
"REVERSE" POWER AT TRANSMISSION LINE ENDS HAD BETTER GIVE RESULTS THAT
AGREE WITH THE ABOVE TABLE.'

And, of course, the two above power/energy models agree exactly with
Roy's table but that doesn't seem to matter one iota. They are still
"gobbledegook" (still sic).
--
73, Cecil, http://www.qsl.net/w5dxp

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On Thu, 30 Jun 2005 11:05:57 -0500, Cecil Moore
wrote:
Non-glare glass works the same
way as a 1/4WL matching section in a transmission line.
One trivial example that you thoroughly bumbled through every mistake
possible, arriving at no answer before abandoning.

Richard Clark wrote:

Cecil Moore wrote:

Non-glare glass works the same
way as a 1/4WL matching section in a transmission line.

One trivial example that you thoroughly bumbled through every mistake
possible, arriving at no answer before abandoning.

It was an example for Jim Kelley to respond to.
He declined to discuss it, nobody else (including you)
responded with any technical content, so the thread
was abandoned. If you have anything technical to
contribute, feel free to fire it up again.

That happens a lot on this newsgroup. When someone
realizes that he is about to be proven wrong in
public, he simply goes away - human nature.
--
73, Cecil, http://www.qsl.net/w5dxp

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Cecil Moore wrote:
Richard Clark wrote:

Cecil Moore wrote:

Non-glare glass works the same
way as a 1/4WL matching section in a transmission line.


One trivial example that you thoroughly bumbled through every mistake
possible, arriving at no answer before abandoning.


It was an example for Jim Kelley to respond to.
He declined to discuss it, nobody else (including you)
responded with any technical content, so the thread
was abandoned. If you have anything technical to
contribute, feel free to fire it up again.

That happens a lot on this newsgroup. When someone
realizes that he is about to be proven wrong in
public, he simply goes away - human nature.

Cecil, you never actually prove anyone wrong,
you just get excited and irrational whenever
anyone disagrees with you. You're confusing the
fear of being proven wrong with just giving
up in disgust at your silly antics.
73,
Tom Donaly, KA6RUH

Tom Donaly wrote:
You're confusing the
fear of being proven wrong with just giving
up in disgust at your silly antics.

More of the same personal stuff. How about some
technical content for a change?
--
73, Cecil, http://www.qsl.net/w5dxp

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On Thu, 30 Jun 2005 12:14:36 -0500, Cecil Moore
wrote:
More of the same personal stuff. How about some
technical content for a change?

http://www.qsl.net/w5dxp/weblaser.GIF
(which I am sure you will soon hustle off in embarrassment)

For an angle of incidence of 30°

How much power is reflected from Surface A (first incidence)?

How much power is reflected from Surface B (first incidence)?

How much power is transmitted through all interfaces?

:-)

On Thu, 30 Jun 2005 11:43:24 -0500, Cecil Moore
wrote:
That happens a lot on this newsgroup. When someone
realizes that he is about to be proven wrong in
public, he simply goes away - human nature.
No doubt this is a set up for abandoning my other question
in this thread
Message-ID:

Cecil. W5DXP wrote:
"A 1/2-wavelength of transmission line reverses the phase of the
current, certainly a 180 degree "transformation"."

Yes. One of the baluns in the ARRL Antenna Book uses an extra180-degrees
of 75-ohm coax to drive an element in a 300-ohm balanced antenna from an
unbalanced 75-ohm aource.

Best regards, Richard Harrison, KB5WZI

Richard Harrison wrote:

Yes. One of the baluns in the ARRL Antenna Book uses an extra180-degrees
of 75-ohm coax to drive an element in a 300-ohm balanced antenna from an
unbalanced 75-ohm aource.

Best regards, Richard Harrison, KB5WZI


A standard in the VHF and up world; it is used in the T-match.

Question - has anyone ever done any analysis or testing of what happens
to a T-match when run off the center frequency of the balun?

tom
K0TAR

On Thu, 30 Jun 2005 20:43:53 -0500, Tom Ring
wrote:

Richard Harrison wrote:

Yes. One of the baluns in the ARRL Antenna Book uses an extra180-degrees
of 75-ohm coax to drive an element in a 300-ohm balanced antenna from an
unbalanced 75-ohm aource.

Best regards, Richard Harrison, KB5WZI


A standard in the VHF and up world; it is used in the T-match.

Question - has anyone ever done any analysis or testing of what happens
to a T-match when run off the center frequency of the balun?

Your question is not clear. Are you asking about tee-match performance
or balun performance?

There has been an examination of the balun performance.

"The Half-Wave Balun: theory and application", J Nagle, K4KJ, ham
radio magazine, Sept 1980 pp 32-35