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Re: Topband: Top-band Prop along grayline

To: <topband@contesting.com>
Subject: Re: Topband: Top-band Prop along grayline
From: John Kaufmann <john.kaufmann@verizon.net>
Reply-to: jkaufmann@alum.mit.edu
Date: Fri, 11 Mar 2005 11:23:19 -0500
List-post: <mailto:topband@contesting.com>
Most of us use the term "long path" rather loosely.  In my case when the JA's 
are strongest on my SE Beverage, I call it LP.  That Beverage happens to be 
aimed at 135 degress.  However, because of the beamwidth of the Beverage, it's 
not possible to resolve the "exact" direction with any certainty, so I refer to 
directions in general terms, e.g. NE or SW.  What is for sure is that on the 
few occasions when I've observed LP JA's, there has never been a trace of a 
signal from the SP direction, which is NW.  I think you'll consistently find 
the same thing reported by other observers of LP.

I have also worked many LP JA's on 80m and there is more evidence there that 
the path certainly isn't anything close to SP.  That's because a number of the 
JA's worked on this path are using directional antennas and signals peak when 
stations on both ends of the path are beaming in the general LP direction.  
Sometimes the direction skews slightly east from my location, but it's never 
close to SP.

On the half dozen or so occasions when I've seen LP JA's on 160, there has 
always been good to excellent LP propagation to JA on 80 at the same time.  The 
same holds true for some of the other LP DX I've seen on 160 and 80.  For this 
reason I tend to believe there is a pretty good correlation between LP 
propagaton on these two bands.

While it would be very interesting to know how the signals actually propagate 
between the end points, in a sense it's academic.  From a practical standpoint 
we only need to know which direction to point our receiving and transmitting 
antennas to work the stuff and let nature take care of the rest.  :-)

73, John W1FV

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