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Old May 28th 10, 06:56 PM posted to rec.radio.amateur.antenna
Richard Clark Richard Clark is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 2,951
Default W2DU's Reflections III is now available from CQ Communication...

On Fri, 28 May 2010 08:18:44 -0700 (PDT), walt wrote:

Richard, I'm not sure I understand thrust of your theme correctly. Are
you accepting my measurement data as proof of my position, or are you
including my data as a happy state of ignorance on this topic?

Walt, W2DU


Hi Walt,

You understand my "truly kabuki" suitably enough, which means the
others must be lurking in the shadows unable to step up to the bench
of their own demonstrable scientific commitment.

Your numbers show evidence of source resistance. Like any real
resistance, in a complex mix of reactances and phases, all
superposition energies collapse to reveal a net value that is either a
caloric break-even, gain, or loss. This real resistance is the
experience of EVERY correspondent here.

As for your position, your proposal appears to exhibit source
resistance where you deny its reality. This is a longstanding
difference we have had and I presume will never be bridged.

If you had never opened the door to the conjugate match, because what
you argue with your data as support is properly an image-Z match, then
you would be on a firmer foundation, rhetorically.

The Z match more close corresponds to the maximum available power
transfer theorem and models of Thevenin/Norton sources. Neither of
these sources demand a resistor - this was a high school physics
artifact with about as much rigor as Sunday school is to theology.

Terman explicitly offers Thévenin's Theorem on the bottom of page 74
continuing onto page 75. He describes the Z match in the middle of
page 76. Your argument is what Terman calls an "image-impedance
basis." Note the term "basis," it has been my question to you for
years as to what basis you have used. I have never gotten an explicit
response.

In the second paragraph of 3-8 we find Terman discuss the conjugate
basis of matching for maximum available power delivery. I won't
belabor what can be read by the multitudes for themselves.

However, beyond this discussion, Terman offers an APPLICATION where
its topology is entirely congruent with the propositions being bandied
about here. Please turn to pages 262, 263 footnotes to observe plate
resistance and grid-leak resistance being offered - not Zs but Rs.

This last point, yet another distraction, probably brings a collective
sigh of relief as the shadows are emptied with those who throng to
argue the meaning of resistance instead of measuring it at their own
bench.

Truly Kabuki.

73's
Richard Clark, KB7QHC