Been hearing Don, VE9XX a lot lately. Worked him a couple days ago
beaming at 70 degrees.
Today he was strongest at 15 degrees ( from central Ohio.) I tried
five times to point the 5 el yagi at anywhere between 0 and 90 degrees
but always heard him best at 15 degrees .
BTW, Don reports many US-Europe qsos on 6m in the mornings, especially
involving the Midwest, where I live ( central OH), but Ive yet to hear
across the pond this season.
Don also reports JAs FB copy in the mornings. Here, nada.
Maybe one day my ship will come in.
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Sent: Saturday June 5 2021 12:02:07PM
Subject: Topband Digest, Vol 222, Issue 3
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Today's Topics:
1. Re: Interesting observation and comment (Skewed Path Vs.
Horizontal/Vertical Polarization) (Bill Tippett)
--
Message: 1
Date: Sat, 5 Jun 2021 08:53:27 -0400
From: Bill Tippett
To: topband
Subject: Re: Topband: Interesting observation and comment (Skewed
Path
Vs. Horizontal/Vertical Polarization)
Message-ID:
Content-Type: text/plain; charset="UTF-8"
23 years ago (!) I wrote:
K9LA wrote:
>*And another thing that clouds the issue - many of our antennas have
a *
>*response to the other polarization. For example, Beverages respond
to *
>*horizontal polarization off the side. *
Very true! In fact, noticing signals on my Beverage system that
were skewed by 90 degrees was usually a clue to check my dipole!
When this happened, the dipole would often (but not always) be
the best antenna. The exception to this was when signals traversing
the Auroral zone were skewed by disturbances (K index 4+). Usually
this sort of skewing would shift signals by less than 30 degrees in
azimuth but some really large disturbances would cause shifts up to
90 degrees! But that's another story and a completely different
propagation mechanism.
Back to the present, since nearly all horizontal antennas are low (in
wavelengths),
there is no way to determine azimuths (since high angles equate to
omnidirectional).
Only a Horizontal Waller Flag up >100' can to that, and these would
be
low horizontal
angles, not high angles.
I put up an Inverted-V on my 30m tower in January 2004 in order to
have a "high-angle" antenna for those cases when we have that type of
propagation. The *blue *plot below shows the elevation pattern. It
turns out that 30m is about the optimum height to maximize radiation
straight up (7.14 dBi at 90 degrees), which was my goal for this
antenna. The other plot is a quasi-4 square which shows low angle
vertical polarization angles for comparison.
http://web.archive.org/web/20191102091231/http://users.vnet.net/btippett/new_page_10.htm
/>
73, Bill W4ZV
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