[TowerTalk] 40M rotary dipole

[john at kk9a.com]

For many years I used no choke on dipoles and they seemed to work fine.
However, it is so easy to wind coax around a few ferrites that I now I
choke every antenna. K9YC has excellent choke examples and information on
his website.

John KK9A


 TowerTalk'" <towertalk at contesting.com>
Subject:	Re: [TowerTalk] 40M rotary dipole
From:	"Gene Smar" <ersmar at verizon.net>
Date:	Tue, 19 Sep 2017 22:59:06 -0400

Dave:

     If you decide to wind a coaxial balun, here's a link to the D40 manual
https://www.dxengineering.com/parts/csh-d40/documentation   . 
Essentially, the
balun is 12 turns of non-foam dielectric coax wound on a 6 inch diameter
form.
I wound my own balun for my D40 that's been up on the tower since 2001.

73 de
Gene Smar  AD3F