[TowerTalk] Ring Rotator and Tribander? Advise sought

[john at kk9a.com]

Why would the tower interact more with a tribander any more than a 
monobander?  I have used ring rotators on 10m, 15m and 20m with much larger 
tower than you're using with great results.

John KK9A



To: 'towertalk' <towertalk at contesting.com>
Subject: [TowerTalk] Ring Rotator and Tribander? Advise sought
From: "Roger (K8RI)"
Date: Mon, 16 Mar 2009 16:15:01 -0400


I tried this about 15 hours ago, but it's not shown up so I'll try
again. My apologies if it shows up twice.

I know we've had several discussions on "Ring Rotators", but I haven't
found anything on using them with tri-banders.
 I'd like to mount my TH-5, or 6 or new large 30-10 multibander just
above the second set of guys, (~70') but I'm limited to size for guy
clearance.  (I'm using Phillystran) I have my doubts about interaction
with the 45G which is a pretty good size chunk of steel stuck up through
the antenna. Has any one on here tried this, or modeled it to see what
the effects are on the antenna.  I'd expect some degradation, but how
bad could I expect? Is it even worth trying.   That'd free up the top of
the tower for something on 40 along with the 7L C3i 50 Hz Yagi.

73

Roger (K8RI)