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Re: Topband: Re: Increasing bandwidth 160m L

To: <k8do@mailblocks.com>, <topband@contesting.com>
Subject: Re: Topband: Re: Increasing bandwidth 160m L
From: "Tom Rauch" <w8ji@contesting.com>
Reply-to: Tom Rauch <w8ji@contesting.com>
Date: Fri, 31 Dec 2004 08:12:04 -0500
List-post: <mailto:topband@contesting.com>
> Can't be done... If you intend to cover the band get busy
building
> either a remote tuner or switched/tapped networks for
matching..


A thicker element will increase bandwidth.

An element that is self-resonant will increase bandwidth
over one that is intentionally too long or short.

A very low reactance parallel L/C circuit across the
feedpoint will increase bandwidth. (The reactance of each
component has to be a low value, that's why stubs like
coaxial cable stubs used in coaxial dipoles and such won't
do much of anything unless they are very low Z or you
parallel multiple low-loss low-Z stubs.)

I'm reasonably sure a combination of these three techniques
would easily cover all of 160 meters without retuning.

73 tom

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