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Re: [TowerTalk] EFHW core

To: K9MA <k9ma@sdellington.us>, towertalk@contesting.com
Subject: Re: [TowerTalk] EFHW core
From: "Richard (Rick) Karlquist" <richard@karlquist.com>
Date: Mon, 21 Sep 2020 17:49:32 -0700
List-post: <mailto:towertalk@contesting.com>
On 9/21/2020 4:27 PM, K9MA wrote:
It's a multiple of a half wave on all those bands, which means the feedpoint impedance is very high, typically 2,000 to 5,000 Ohms. A good

"all"?

If it were about 65 feet long, it could be a half wave on 40 CW, and a
full wave on 20 low phone, 1.5 wl on 15 high phone and 2 wavelengths on 10 FM. (The resonant frequency increases by a factor a little in excess of the harmonic number.) However, even that doesn't explain how it is supposed to work on 30, 17, and 12 meters or cover 10 CW.

You might as well call it an end fed random wire.

Rick N6RK
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