Lots of experience in this. My method was to make a scale drawing of the
antenna(s) on a piece of clear plastic (like a looseleaf sleeve) and then
slide it around a scale drawing of the clearance of the guy station. You'll
find pretty much the optimum angle to swing the antenna is about 45
degrees off the swing arms. That will give you the most clearance if you are
really tight for clearance.
Generally you'll find the normal turning radius is increased by about
three feet using a swing arm. Of course the type of antenna, the leg space of
the tower and how far from you leg the rotor is located.
All my experience is from using my home made swing arms and sidemounts.
By the way I have some really nice sidemounts (galvanized) for sale. I
don't need them anymore since I went to rotating towers.
Good luck with the project.
Bill K4XS/KH7XS
In a message dated 1/29/2012 9:12:19 P.M. Greenwich Standard Time,
rmthorne@att.net writes:
I'm very close to finishing up my 80' tower. I'm going to install a
swinging gate side mount at the 40' level. I'm looking at the IIX unit.
Does anyone have enough experience with one (or another brand side
mount) to tell me how much the turning radius of the antenna is
increased. After looking at the IIX website I'm guessing it increases
by about 3 feet.
I've spaced my guy anchors out further, by about 20', than the rohn
spec's to be sure I have enough room to swing the lower antenna below
the upper guys. Right now I plan on guying at 40 and 70 feet. If
needed I can go 40 and 80 feet to ensure I have the clearance needed. I
would prefer 40 and 70 so I don't have to get another section of tower.
Thanks
Rich - N5ZC
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