Eric
I have been using a rotatable K9AY Loop on a old HyGain Rotator. For high
angle incoming signals, it is not too bad. I also use a 6 ft diameter coax
tune loop. It is very very quiet. I can hear DX on the coax loop that I
cannot hear on the K9AY Loop. The only things better would be a beverage
which I have no real estate for and also the Hi-Z vertical array. My Hi-Z is
a dual 4 square at 45 degrees rotation between the 2 4 squares. It occupies
80 x 80 feet square. My best DX on it was EY8MM , could not hear him on
either loop.
I had to buy the empty lot next to me for the Hi-Z. Whereas the rotatable
K9AY loop uses a 15 ft radius and is about 50 feet from the TX vertical. The
coax loop is about 22 feet from the TX vertical in the opposite direction.
To see these antennas, go to http://qrz.com/db/K3ZXL and scroll down to the
links for these antennas. I can answer any other questions if you need.
Best Regards
Dan Schaaf
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K3ZXL www.k3zxl.com
60 Meters www.60metersonline.net
=================================
NOBSKA www.nobska.net
Cape Cod Instruments www.gnm-inc.com
Tel: 941-766-0706
Fax: 941-766-0707
=================================
-----Original Message-----
From: Eric Rosenberg
Sent: Sunday, August 11, 2013 2:24 PM
To: Tower Talk Mailing List
Subject: [TowerTalk] Comparing K9AY Loop and KB7GF Shared Apex Loop Array?
I'm in need of a decent 160 receive antenna that can fit in my 144 ft
(N-S) x 44 ft (E-W) noisy urban lot. I'm surrounded by (old) power lines
and near a high power AMer (WFED, formerly WTOP) at 1500 kHz. The 160
and 80m inverted L's and 40m half-square run N-S from the back of the
lot to the front.
I've played with EWE's and Pennants, both of which are rather mediocre.
Generally speaking, the Inv-L's have been better, albeit noisier,
receive antennas.
I've looked at K9AYs and now the KB7GF array, which seem to be quite
similar. I'd like to think I can fit either in my backyard, but if I do,
they will be very close to the TX antennas... *maybe* 20 feet from the
verticals, and certainly underneath all the wires. Is one substantially
better than the other?
A major criteria is that the horizontal sections (wires) have to be 10
feet above the ground... I don't want to behead anyone walking in the
backyard!
Is this all a pipe dream?
Sagely advice is appreciated.
73,
Eric W3DQ
Washington, DC
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