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Re: [TowerTalk] Omnidirectional antenna for domestic contests. Re: Tower

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Omnidirectional antenna for domestic contests. Re: TowerTalk Digest, Vol 154, Issue 18
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Mon, 12 Oct 2015 20:23:17 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
On Mon,10/12/2015 8:02 PM, Joe Subich, W4TV wrote:
Most QSOs for those in flyover country are at takeoff angles
greater than 60 degrees on 80 and 40 meters.

I've seen propagation studies that dispute that statement.

However, that still
argues for a height of roughly 50 feet for an 80/40 trapped or fan
dipole (3/8 wave on 40 meters, 3/16 wave on 80 meters).

Then my 80/40 fans at 140 ft shouldn't work locally. But they do.

Further -- straight up is a terrible angle -- it often goes through the reflecting layer rather than refracting or reflecting.

73, Jim K9YC
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