Two 100 x 3 ft rolls of chicken wire were added this fall. I have about 45
radials, good conductivity, clear view, and the sump pump dumps out nearby. It
is quiet in the country but the beverages are better. I am putting up a
SAL30. It will be better for USA contests. The F/B is good enough that you can
tell someone is calling.
K9ZO
________________________________
From: Topband <topband-bounces@contesting.com> on behalf of Todd Goins
<tgoins@gmail.com>
Sent: Friday, December 28, 2018 5:35:53 PM
To: TopBand List
Subject: Topband: Inverted L improvement question - Part 2
I originally started this thread and I want to once again thank everyone
who provided input and advise both privately and on the reflector.
So the 100' tall vertical with the 30' horizontal loading wire works
**horribly**. I have about a week with it now every evening and it is much,
much poorer transmitting (and receiving, as expected I guess) than the 43'
vertical with the 90' horizontal.
Since everyone was united in the opinion that I needed a dedicated
receiving antenna I put out a 200' BOG (pointing east) with the transformer
and terminating resistor from DXEngineering. The BOG is really quiet
(S1-S2) compared to the verticals and it hears "okay" but I wouldn't say it
was great by any means. The Stew Perry tomorrow will give me better chance
to evaluate it.
Back to the 100' vertical. Since it wasn't working being tied into the
buried radial field I was using for the 43' (PSK Reported showed dreadful
performance) I decided to take a different approach and made it have an
elevated feed point at about 7' above ground and I ran three 130' elevated
(also around 6' to 7' high) counterpoise wires. This antenna works a little
better but still not nearly as good as the 43'.
Several people asked me to make R/Z measurements of the antenna at the feed
point. I'd love to provide that info but my Comet CAA-500 MarkII antenna
analyzer is being totally killed on 160m by a 27.5KW AM broadcast station
that is about 2 miles from my QTH. It will not work. The analyzer has been
fine on 6-40m and sometimes works on 80m but 160 is no-go. So I can't get
the reactance and resistance values you all wanted.
So, here is my question. The one easy modification I can make to the
antenna, now that I have elevated radials connected, is that I can elevate
the feed point. I can raise it to about any height necessary. Would this
make any difference? I would lengthen the horizontal wire by whatever
distance I raised the feed point, right? Any ideas or am I just chasing my
tail?
Thanks for reading and any advise you can give.
73,
Todd - NR7RR
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