It just goes to show that what looks good on paper in theory does not mean
it HAS to be the same in the real world.
There is nothing to prevent 2 signals a continent away and with different
antennas from taking completely different paths when one is at either sunset
or sunrise.
There hasnt been a book written yet to explain it all.
On a different note there was no way anyone would have believed that it was
possible to work JA on 6M at the bottom of the cycle from New England yet
several of us made the trip starting a few years ago. Experts are still
arguing about that mechanism while on here one stands on a platform (not you
Carl) and expects everything said to be believed without question.
Carl
KM1H
----- Original Message -----
From: "Carl Clawson" <clawsoncw@gmail.com>
To: "topband" <topband@contesting.com>
Sent: Tuesday, December 04, 2012 6:22 PM
Subject: Re: Topband: one-way propagation
Yes, a good point that I neglected. This entirely circumvents my
yammerings
about reciprocity. Reciprocity is a characteristic of a single pair of
ports in a network. Introducing separate receive antennas can surely cause
a one way effect. Consider what happens when I hook up a dummy load as a
Rx
antenna ...
73 and thanks for listening,
Carl WS7L
I've often thought that some "one-way propagation" is simply due to the
differences in antennas. For example, two stations with the same power,
ambient noise level, etc. are receiving on Beverages pointed at each
other,
but their TX antennas have different takeoff angles and/or patterns.
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Topband reflector - topband@contesting.com
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