[TowerTalk] 80 M 4 SQUARE MODELING

john at kk9a.com john at kk9a.com
Thu Jul 20 07:05:29 EDT 2017

I modeled 2 and 4 free standing verticals around my 80' tower and saw no
serious issues so I imaging that this will work. K9RS has a nice article
on bent wire low band verticals around his towers. Don't be intimidated by
modeling software, it a great tool to have.

John KK9A

To:	TOWERTALK at contesting.com
Subject:	[TowerTalk] 80 M 4 SQUARE MODELING
From:	Bill via TowerTalk <towertalk at contesting.com>
Reply-to:	cqtestk4xs at aol.com
Date:	Wed, 19 Jul 2017 17:00:46 -0400

Now that I have finished my tower for 40-10 meters I need to start my next
project.  I'm limited to the one 90 foot tower I have by county code.  I am
planning on running 4 ropes from the last guy point (84ft) to install a
wire 4
square for 80 meters.  Wires would be suspended vertically from the ropes
in a
typical 4 square pattern using Comtek switching.

Before I go through all the work installing the antennas and the radials
I want to be sure the tower and all the antennas on the tower will have
effect on the 4 square.  I'm using Philly for the guy wires so that is not an
issue.  I can mess with the HFTA program all day long and feel comfortable
working with it.  However, this is not a project for HFTA and my computer
antenna modeling skills are sorely lacking.

Is there anyone out there who could model this setup to determine if the
and antennas will negatively affect the 4 square system.  I would be glad to
share the exact details of the antennas, their heights, length of boom
etc. off
reflector to facilitate the analysis.

The 4 square is the only high performance system I can use out here due to
restrictions set by the county so any help on this would be appreciated.

73  Bill K4XS/KH7XS

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