Your friend should join the towertalk list.
I used a 1/4wl vertical wire hung off of a guy cable about 50 feet from my
tower and it worked fine. The tower will distort the pattern and also the
proposed inverted L is not omnidirectional. This configuration is easy to
model so I would suggest that your friend model his antenna system before
going though the effort of installing it.
John KK9A
To: "TowerTalk@contesting.com"
Subject: [TowerTalk] Fwd: My question
From: Jim Miller
Date: Mon, 16 May 2016 15:38:20 -0400
One of my friends is thinking about installing a 70 ft. tower with a
2-element shortened 40M yagi. He is thinking about installing the new tower
in a location where he now has a vertical used for 80M and 160M (i.e - the
existing radials will terminate at or close to the base of the new tower).
He is planning to relocate the 80M vertical to another location with other
radials. He would like to support an inverted L for 160M off of the new
tower, using the existing radials. His question is, how far must the
vertical leg of the inverted L be spaced from the new tower, with a view to
keeping it close enough to use the existing radials?
Thanks
jim ab3cv
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