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[TowerTalk] Tri-Band and Vertical Seperation

To: <towertalk@contesting.com>
Subject: [TowerTalk] Tri-Band and Vertical Seperation
From: nielsen@oz.net (Bob Nielsen)
Date: Mon, 20 Aug 2001 21:09:17 -0700
On Mon, Aug 20, 2001 at 07:48:02PM -0500, Jimmy Floyd wrote:
> 
> Hello all;
> I have a 40 ft Rohn 25G tower with an A3S tribander at the 41 ft. level.
> There is 5 to 6 feet of 1 and 3/4 inch mast above the tribander. Plan is to
> install an Antron 99 cut for 10 meters above the tribander.
> Two questions:
> Is the 5 to 6 ft spacing enough to not allow interaction?
> If I leave the Antron uncut and use a tuner to also load it on 15 and 20
> will that cause a problem with the A3S?

Since it would be cross-polarized to the A3S, there should be minimal
interaction (assuming you don't add any radials).  I also doubt that
the performance would be very good, compared to the A3S.

Bob, N7XY  

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