Bill:

[snip]
Are you really serious? Do you really want folks
to grind through all of this and propose
counter-arguments, questions, etc?

I suggest most respectfully "enough is enough".

A carefully written QEX article by you on this
entire subject would be a good idea and a
permanent part of the literature.

Bill W0IYH
[snip]

Hi Bill...

Well a lot of this material is already a permanent part of the professional
literature, in both IEEE Publications and Standards Organizations
contributions. Not very accessible to amateurs. And so it seems that
others
outside the xDSL industry are not aware of all the work that has gone on
with
broadband data transmission over complex Zo transmission lines.

I personally believe that the full duplex transmission of broad band
multi-megabit data over several thousand foot multi-pair twisted
pair complex Zo cables is one of the most challenging transmission
line problems ever tackled by man and solved by modern science
and engineering. The several extant solutions to that problem developed
by the digital subscriber loop [xDSL] industry certainly makes clear
a lot of the transmission issues that are sometimes subjected to fuzzy
thinking and discussed loosely on this NewsGroup from time to time.

A few months ago, I posted on here a few items of interest from the
detailed measurement and characterization work done world wide
by ETSI, ITU and ANSI and documented in ANSI T1E1.4
contributions on the details of the Zo of complex Zo transmission lines,
but there seemed to be little interest in such data from the NewsGroup
participants who seem to concentrate only upon short lossless,
distortionless
50 Ohm lines.

Perhaps the amateur radio community is simply not interested in
leading edge advances in communications technologies outside of
the conventional amateur communications techniques.

:-)

I would be willing to write such an article for QEX, however...
not without an invitation to do so. An unsolicted contribution would
be a lot of work on the part of anyone who undertook
such a project and it might all be for naught.

Personally I wouldn't do so without a clear indication from the
editor that such an article could be published. This is simply because
time is valuable and the fear that an unsolicited manuscript might be
be rejected simply because, although interesting, it would be of
little interest to the amateur radio community.

I can however provide professional technical references to anyone
who might have a sincere interest in learning about such things.

--
Peter K1PO
Indialantic By-the-Sea, FL.