Frank:
I use the data stream found around 1.953 +/- MHz or W1AW code practice
at 1.818 MHz as a signal source for A/B/C comparisons on my 160M antennas
(L, shunt-fed tower, and 80M sloper.) Why not do the same for your L both
with and without the ground rod connected and let us all know. We'd
appreciate it.
73 de
Gene Smar AD3F
-----Original Message-----
From: Frank Davis <fdavis@nf.sympatico.ca>
To: topband@contesting.com <topband@contesting.com>
To: <topband@contesting.com>
Date: Sunday, December 08, 2002 9:21 PM
Subject: Topband: Ground Rod at Radial Junction point
The 160M antenna here is an inverted L with total wire length about 145ft.
At present I have 12 radials on the ground of various lenghts 50-75 ft and
also 4 elevated radials that are about 6ft above ground and about 50 feet
long each. The antenna and the radials are made from #14 insulated wire.
All of these radials are bonded to a common tie point which is a 6 ft copper
ground rod 5/8" diameter. The matching network for my inverted L is merely
a series 500pf variable capacitor and it is in a metal weatherproof box and
a copper braid runs from the ground rod tie point to the metal case that the
cap is in. While doing a serach for info on elevated radials I came across
a reference on the OK1RR web page that came from an unknown author. This
author said that a ground rod should not be used at the junction point of a
radial system. He said that when the ground rod was not at the radial
junction point of the anrtenna that he was using the Feild Strenght
increased.!! I personnally can't see why a ground rod at the tie point
should impact negatively on the performance and I want to know what the
opions are out there. Should I leave the radials bonded to the rod or
not......anybody got any opinions on this??
Frank
VO1HP
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