Your feedline is about 350 feet. That is (with RG213 -velocity 0,66-) close
to 1 wavelength. With 1 wavelength feedline, the TX antenna is floating when
the feedline is open in the shack.
Just wrong once more. !!
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Topband Reflector Archives - http://www.contesting.com/_topband
Your feedline is about 350 feet. That is (with RG213 -velocity 0,66-) close
to 1 wavelength. With 1 wavelength feedline, the TX antenna is floating when
the feedline is open in the shack.
I'm sorry to say that , but the concept is wrong, the TX antenna resonance
as structure has nothing to do
30, 2016 9:10 PM
To: <topband@contesting.com>
Subject: Topband: Modeling Transmit Antenna Affect on Rx Antenna
Performance?
For transmit I use a 160M T antenna with on ground radials. I am
considering installing a Circle-8 receiving array such as one made by
Hi-Z. The receive array would
Hi Paul,
Modeling the effect of the feedline and the receiver terminating the
feedline is tricky. Some are able to short or open the TX feedline in the
shack due to a "favorable" length from the antenna to the shack. The brute
force method is to install a vacuum relay at the feedpoint which
Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Paul Ferguson
Sent: Friday, September 30, 2016 12:10 PM
To: topband@contesting.com
Subject: Topband: Modeling Transmit Antenna Affect on Rx Antenna Performance?
For transmit I use a 160M T antenna with on ground radials. I
My TX antenna is 60ft from my vertical WF and my horizontal WF is at the top
of my TX antenna. I am using a Folded Unipole configuration, it is a skirt
with 3 wires forming a cage. The skirt detune the tower during RX and help
the TX with a huge broad band.
In your case, just open the T
For transmit I use a 160M T antenna with on ground radials. I am
considering installing a Circle-8 receiving array such as one made by
Hi-Z. The receive array would be very close to the T, maybe within 100
feet. I am using EZNEC to see how the transmit antenna proximity
affects the pattern of
