My commercial 80 foot tower with a log periodic on a mast 20 feet above the
tower top has sections of steel wire rope spaced 8', 10', 10', 10', then 70' to
the ground turnbuckles. The antenna itself is specified from 3 through 30 MHz.
I have plenty of the insulators left over if anyone wants some, just $2 each...
-W6DSR
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of KD7JYK
DM09
Sent: Saturday, September 17, 2022 22:49
To: TowerTalk
Subject: Re: [TowerTalk] Feeding Guys was Loading Guy Wires
> Phillystran turned that into a much better antenna. I suspect that
> making sections of guy resonant on one of the bands could have some
> unexpected effects on other antennas on the tower. Or, it might work fine.
I'd have to dig out some old books, but didn't the ARRL Handbook have a
chart of all metallic guy lengths to avoid to prevent interactions, and
resonance?
Like the image on the left here:
https://2.bp.blogspot.com/-lOK9wj3pL30/WQvMHmLNnHI/AAAAAAAACj8/fKDc1jzvZjAayfvoO7x5P-tFkb7FhsRkACLcB/s1600/arrl_vs_n2ic_guy_interactions_vs_length.png
It's been nearly thirty years since I've referenced it, I use synthetic
materials now.
Kurt
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