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Re: [TowerTalk] coax stubs /bandpass filter

from [jimlux] [Permanent Link][Original]
To: "Tower and HF antenna construction topics." <towertalk@contesting.com>
Subject: Re: [TowerTalk] coax stubs /bandpass filter
From: jimlux <jimlux@earthlink.net>
Reply-to: "Tower and HF antenna construction topics." <towertalk@contesting.com>
Date: Tue, 30 Mar 2010 06:01:31 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com> 
Along a similar note..

The stub is just a moderate Q resonator that's easy to fabricate.  Why 
not put a lumped LC shunt trap across the feedline?

Too hard to get the Q low enough?
Doesn't have the nice harmonics property? (a coax stub for 40 is also a 
stub for 15)

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