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Re: [TowerTalk] Replace Carolina Windom Line Isolator

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Replace Carolina Windom Line Isolator
From: "Joe Subich, W4TV" <lists@subich.com>
Date: Fri, 10 Jul 2020 11:38:28 -0400
List-post: <mailto:towertalk@contesting.com>
On 2020-07-10 11:14 AM, Bert wrote:
>
> You need a 4:1 balun at the feed point

The Carolina Windom uses a *voltage balun* not a current balun.
Don't use a current balun or the feedline radiation (above the
"line isolator") and operation on 15 meters will be compromised.

73,

   ... Joe, W4TV


On 2020-07-10 11:14 AM, Bert wrote:
Hi Pete,

You need a 4:1 balun at the feed point and a common-mode choke
to replace what Radioworks call line isolator.

I have had a few Carolina Windoms and the performance and quality
of the balun and line isolator are definitely not the best!! ;-)

Bert VE3NR



On 2020-07-10 10:14, N4ZR wrote:
I just blew up the line isolation choke on my Carolina Windom - not good timing right before the IARU test.  I have now blown both the balun and the line isolator on the antenna.  The antenna works really well on 40 and 80 (when it works)

I'm guessing that just about any 1:1 unun of sufficient power rating will do - or are there special considerations I'm not aware of?  Any recommendations?



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