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Topband: 160 Meter Propagation

To: topband@contesting.com
Subject: Topband: 160 Meter Propagation
From: Bill Tippett <btippett@alum.mit.edu>
Date: Thu, 15 Jan 2009 09:36:58 -0500
List-post: <topband@contesting.com">mailto:topband@contesting.com>
VE7DXR from p7 of:
http://www3.telus.net/public/shallpat/article/qex_7dxr.pdf

"If we knew the arrival
angle of a received signal during
an enhancement, we could visualize
the phenomenon more clearly"

         I often seen post-sunrise enhancement using an inv-V with
apex up 30m (<0.2 wavelengths and peak TOA straight up).  I believe
we have the same enhancement from stations in EU/Middle East/AF
at their sunrise who are using marginal (i.e. high-angle) antennas.  This
may be some sort of high-angle mode which injects the signal into the
ducting region. Your results might have been very different if you used
high-angle RX antennas for your tests.

                                 73,  Bill  W4ZV 

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