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Re: [TowerTalk] Modeling Ladderline as an Antenna Element

To: "Jan Erik Holm" <sm2ekm@telia.com>
Subject: Re: [TowerTalk] Modeling Ladderline as an Antenna Element
From: "Tom Rauch" <w8ji@contesting.com>
Reply-to: Tom Rauch <w8ji@contesting.com>
Date: Tue, 25 Oct 2005 13:27:53 -0400
List-post: <mailto:towertalk@contesting.com>
> Case: 100ft vertical with linear loading 26ft up and down,
> resonant at 1890 kHz with 32 ohms measured with MFJ269.
> Result: 0.5 dB loss due to liner loading, result could be
> repeated time after time.
> Bottom line: Thank you W8JI for the 0.5 dB gain.
> Linear loading is now removed permanently!

While that small change demonstrates loss in linear loading,
the effect is really bothersome when the antenna is very
short. With a long antenna, like a 100ft tall 160 antenna,
you can get away with doing things that would make a major
difference in a 50 foot vertical.

In other words when the loading system only corrects a small
reactance error we can get away with poor systems.

73 Tom

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