I sent this link in reply to another similar question a couple of days ago.
Issue is not interference with the SteppIR from the VHF/UHF, but with the
VHF/UHF antennas by the SteppIR. Big advantage of the SteppIR is that it can
"disappear" when the elements are retracted.
>From: Edward Sylvester <firstname.lastname@example.org>
>Sent: Aug 7, 2008 1:39 PM
>Subject: [TowerTalk] Antenna Interaction
>Due to only having one tower and a 10' mast, I would like to see whether it's
>feasible to put up the following: Steppir 3 element (bottom) 12 element 2m
>horz beam with UHF 21 element horz beam at same level on metal cross boom,
>sitting two feet above LPDA (50-1300 MHz) at the top, vertically
>polarized. How much will the the V/UHF antenna setup two feet above affect the
>Steppir pattern?? Thanks,Ed NI6SWhittier, CA
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