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Re: [TowerTalk] Resonance is over rated

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Resonance is over rated
From: "D.W. Fearn" <dwfearn@dwfearn.com>
Date: Fri, 07 Aug 2009 16:17:39 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Many AM broadcast towers are not resonant -- 5/8 wavelength is 
common. A few capacitors and inductors bring the tower to 50j0 for 
50-ohm coax. No baluns are used. These antennas are fed with 
transmitters that are a lot less tolerant of reflected power than 
most ham rigs. Broadcast antennas have to be very efficient, 
especially if you are paying the power bill.

Doug K3KW

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