OptiBeam uses stubs on their 40m beams and probably on the dipole.
Interaction is minimal around other HF beams and their antennas work well. I
do not know what the stubs really do, I removed them from my model and still
saw no 15m resonance. I thought that shortening alone moves the harmonic
resonance out of the 15m band but that is not always the case. Some 40m
beams have nearly perfect SWR on 15m.
John KK9A
To: Guy Olinger <k2av@contesting.com>
Subject: Re: [TowerTalk] Interaction potential Hex and 40 m dipole
From: Kelly Taylor <ve4xt@mymts.net>
Date: Mon, 1 May 2017 11:48:07 -0500
Doesn't Optibeam use stubs on their 40-10m multibanders to minimize
interaction
between 40 and other bands?
73, kelly, ve4xt
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