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Old December 4th 06, 03:32 AM posted to rec.radio.amateur.antenna
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Default Yagi efficiency

art wrote:
Tom Ring wrote:
art wrote:

They are of a group that everything is known about antennas and is
written in books. If you refer to something that is not in the books


Art:

If you refer to something that is "not in the books" one should take
great care. Why I do think evidence can be brought out and can be
demonstrated that some of the ways we "think" antennas are working is
not real, however, great men have developed thinking models and formulas
which are able to let us design and use WORKING antennas which are
PRACTICAL. I site that mysterious 377 ohms as an example, or for
another, incorporating the spin rate of the earth into antenna formulas
(time), ridiculous (but useful!) But, those "old books" contain methods
and means to develop antennas which do work and which do work well, we
owe much to those who have gone before us ...

I am only hoping that by refusing to allow "magic numbers" to be
embedded into equations without any suitable explanation of what those
numbers are "REALLY ABOUT" will one day awake the man who can form the
vision and see what the others have all been unable to, Tesla seemed to
have had an excellent ability which I hold as example of the type of
"vision seer" I mean.

I have an open mind, I guess you are as likely as the next guy to "be
the one!" Never hurts to try anyway ...

However, thank God practical antennas work and we have the tools to
design and build them.

Regards,
JS
 
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