Posted by
Lyn WØLEN on
Mar 18, 2020; 12:39pm
URL: http://elecraft.85.s1.nabble.com/Off-Topic-Your-advice-suggestion-about-antenna-tp7658892p7659002.html
Jim -
Your comments are well taken ... but mostly invalid for my installation.
For example -
1) Their directional patterns are different on every band;
Exactly, and this plays perfectly into my coverage needs. For example, I
need (and designed for) 80 meter coverage concentrated in a N-S direction.
For every other band, I need (and designed for) more of an omni pattern.
That works best for me and is reasonably well provided by this antenna's
multi-lobe patterns.
2) They have very poor rejection of common mode noise on the feedline
unless choked at the FEEDPOINT (i.e. where the feedline connects to the
horizontal wires) and I know of no practical choke to do that effectively.
I have a hybrid 4:1 / 1:1 balun at the shack end of the balanced feedline
and have absolutely no issues. None. It is a Balun Designs 4116t.
5) Many years ago, N7WS published his research showing that window
line gets pretty lossy when wet. It's in one of ARRL's excellent Antenna
Compendiums.
Agreed, and that's why I didn't use window line. I used open-wire, or true
ladder line, from TrueLadderLine.com. Rain has no effect unless the line
itself is pressed against tree leaves (I do have to do a little tree
trimming now and then).
Noise level is markedly lower than reported by other hams in the area,
whether using vertical or compromised horizontal antennas. My noise level
went down at least 2-3 S units in switching from the attic-mounted G5RV Jr,
while both received and transmitted signals are higher by a similar amount.
Bottom line is that it does what it is intended to do, and does it quite
well.
73
Lyn, W0LEN
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