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Re: [TowerTalk] 80m 4Square Dipole VSWR question

To: "D. Rodman, MD" <>,"towertalk" <>
Subject: Re: [TowerTalk] 80m 4Square Dipole VSWR question
From: "Tom Rauch" <>
Reply-to: Tom Rauch <>
Date: Wed, 17 Nov 2004 05:31:24 -0500
List-post: <>
> The NE/SW pair have resonance curve at 3.58 and 3.57 MHz
using an Autek
> meter.  The NW/SW pair are resonant at 3.66 and 3.67 MHz.
VSWR with the
> transceiver show identical measurements with and without
amplifier.  I had
> questioned possible interaction between the tower, nearby
antennas with
> the 4Square so I wanted to use a low power device to
measure the VSWR
> curves.

The power of the device has nothing at all to do with the
SWR and mutual coupling.

You must have other antennas or objects around interfering
with the dipoles. The only way to know what effect it has is
to watch the pattern. Dump power tells you almost nothing
except what the dump power is. It does not indicate anything
but impedance presented by the load and power wasted because
you are using a mismatched hybrid. Zero dump power does not
mean the elements have the correct current or phase, and
high dump power does not mean the pattern is bad.

73 Tom


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