I am not a member of the YCCC but I do have a couple of years experience
with the Hi-Z. Mine is the 3 element array at 50 foot spacing. The
verticals you construct yourself and are 21 foot tall. Mine are aluminum
tubing from DX Engineering but I know people who have made them from long
fishing poles with wire run up them. Each antenna has a preamp fixed to the
base and requires no ground system, only a ground rod at each antenna.
That's part of what made the system attractive to me. I live on an acre lot
outside of the city and don't have access to enough property to use
beverages. The K9AY system sounds like a good system but unless you have a
spot that you don't mow you can't leave it up any longer than through the
winter months. With the Hi-Z you can put it up and bury the 75 ohm feed so
you can use it more than just when your not mowing. The three element even
at 50 foot spacing (optimized for 160) still works well down to 40 meters.
After that the higher in frequency you go it looses directivity. Although
sometimes it has so much better SNR than my transmit antenna that I can hear
better even on the higher frequencies. The other advantage to the Hi-Z is
that it can be placed within 100 foot of the transmit antenna without any
problems. I have a local AM station that is about 8 miles east of my
location. I never had any problems on 160 until I put up the Hi-Z. Then
the SNR was so good when I pointed the array east I could hear the harmonics
and had to put a high pass filter in to block it on the array. BTW you get
6 directions out of the three element Hi-Z. I am not sure how many
directions the 2 element would give you but If I lived where that was all I
could muster, I wouldn't hesitate to put a 2 element Hi-Z up. Surrounding
objects don't seem to effect it much (although I haven't tested mine in the
total clear) because I have mine in a triangle surrounding a large walnut
tree with a row of evergreens about 10 foot along one side. The bottom line
is before I would work everything I could hear on 160 and now there are a
lot that don't hear me. Time to work on the transmit antenna!
73
Tim, K9CQ
Jacksonville, IL (west central north of Saint Louis MO.)
-----Original Message-----
From: Steven Jobes via Topband
Sent: Friday, November 30, 2018 9:44 AM
To: topband@contesting.com
Subject: Topband: Fwd: [yccc] Hi z receive antennas
-----Original Message-----
From: Steve via Groups.Io <w1dxh=aol.com@groups.io>
To: yccc <yccc@groups.io>
Cc: yccc <yccc@groups.io>
Sent: Wed, Nov 28, 2018 8:51 pm
Subject: [yccc] Hi z receive antennas
Hi I am seeking information from anyone with experience with hi z arrays. I
am considering either the hi z two element array or the Jk antenna bev-flex
beverage system. They both can fill my needs as my property has limitations
headed northeast. And both will give me directivity towards Europe. Thanks
for any advice,
73 ,
Steve Jobes
W1dxh
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