You ever wonder why a few on here are so much louder than their competition
with similar installations when 1-2 keep trying to make us believe it has
nothing to do with the radials beyond a small number? IF he is correct then
why the big difference? Anybody care to offer a guess?
Or the fellow on a city lot that knows he is 10dB below the guy a mile away
out in the country with a big vertical or T with lots of long radials plus a
base mesh....after several years of comparisons. You dont need fancy test
equipment to see that.
Ever wonder why photos of elevated radial BC antennas show a base mesh and a
small number of radials? And then performance tests require a reduction in
power to conform to the canned 120 radials in the ground benchmark signal
strength. Or due to the stations original certification with a full set of
base radials that rotted away and the elevated are the replacements.
Or the person on here who went from an extensive radial system to a full
screen claimed a 5dB improvement but now denys the possibility. Its in the
TB archives from 1998.
A few seem to be in a continuous rut with impedance the only factor they
seem to mention. There is a lot more than just the immediate soil under the
radials that is involved when it comes to field strength many wavelengths or
continents away which also affects the energy in a particular elevation
angle.
Carl
KM1H
----- Original Message -----
From: "Charlie Cunningham" <charlie-> Hee! :- )
-----Original Message-----
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Tom
W8JI
Sent: Saturday, December 15, 2012 7:12 PM
To: DAVID CUTHBERT; Carl
Cc: David Michael Gaytko // WD4KPD; topband@contesting.com
Subject: Re: Topband: raised radials
That is quite an improvement. I had to have dropped the base impedance
from
400 ohms to 40 ohms for it to do that.
Things are often magic when we rely on feelings or emotions to measure
decibels.
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Topband reflector - topband@contesting.com