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Re: Topband: Elementary Inverted L questions

To: topband@contesting.com
Subject: Re: Topband: Elementary Inverted L questions
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Thu, 25 Mar 2021 12:08:47 -0700
List-post: <mailto:topband@contesting.com>
On 3/25/2021 11:39 AM, N4ZR wrote:
The feedpoint choke is wound on a #43 core (I think), which may make it a bit more credible.

Very wrong core for HF and 6M. #31 is the only good choice.

 The measured minimum SWR is 2.2 at 1925 KHz, and resonance (X
crossing zero) is at 1983 KHz.  All measurements made at the base of the antenna

Now here's the part I *really* don't understand - at X=0, the R measures 119 ohms.

The value at X=0 doesn't make sense to me either. Lower SWR at 1925 does.

I suggest that you do an impedance to display the impedance, not SWR. If your analyzer can't do it, borrow one that can.

73, Jim K9YC
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