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@contesting.com>
Subject: Re: [TowerTalk] 40M rotary dipole
From: "Gene Smar" <ersmar@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
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