[TowerTalk] RF Choke or Balun

[Pat Barthelow]

Jim,

Here is some good info on choke baluns...

See: http://www.k1ttt.net/technote/airbalun.html

Sincerely, Pat Barthelow     aa6eg at hotmail.com
http://www.jamesburgdish.org
Jamesburg Earth Station  Moon Bounce Team
http://www.cq-vhf.com

>From: "wb5oxq" <wboxq at grandecom.net>
>To: <towertalk at contesting.com>
>Subject: Re: [TowerTalk] RF Choke or Balun
>Date: Tue, 12 Jun 2007 16:22:15 -0500
>
>If I were to make a new choke for my triband beam out of RG-213, how many
>turns would you suggest and what diameter coil.  Is pvc pipe a good coil
>form?  How far away from the connection at the driven element can it be
>located.  Can I tie strap the assembly to the boom?  My antenna is a force
>12 c-3 at 52' above ground.  My current choke may have been hit by 
>lightning
>at some time and works ok at 100 watts with 1.4 to 1 but at legal limit the
>reflected power rises to 70%.
>WB5OXQ, Jim in Waco