[CQ-Contest] High band rx arrays for contesting

[Tim Duffy]

Hi John

Sometimes and sometimes not. Rain and snow static is a funny beast. The
lower Yagi's are always quiet. The low RX dipoles on 80 and 160 meters (20
feet high) really shine during static periods. They never get any noise and
the signal to noise ratio is always very good. And at that height they are
omni directional.

73,
Tim K3LR

-----Original Message-----
From: CQ-Contest [mailto:cq-contest-bounces at contesting.com] On Behalf Of
john at kk9a.com
Sent: Wednesday, September 03, 2014 8:45 AM
To: cq-contest at contesting.com
Cc: k3lr at k3lr.com
Subject: Re: [CQ-Contest] High band rx arrays for contesting

Out of curiosity, are the verticals less susceptible to rain static than
yagis?

John KK9A



From:	"Tim Duffy" <k3lr at k3lr.com>
Date:	Mon, 1 Sep 2014 20:43:06 -0400
Subject: Re: [CQ-Contest] High band rx arrays for contesting

Hello Mike and Dave!

We have found that 4 squares on 20, 15 and 10 meters work very well for
hearing DX stations. Quick rotation is certainly a plus. It is amazing how
close their performance is - when compared to some of the horizontal Yagi's.

As is the case with low frequency 4 squares, the ground radial field is
critical to getting best performance (gain). For these three HF bands (20,
15 and 10) at K3LR, the 4 squares have 120 radials that are one half
wavelength long under each quarter wave element. All over lapping radials
are silver soldered at their junctions. Ground losses must be minimized.

We have been using quarter wave element four square vertical arrays on all
HF contest bands (except 160 meters) for more than 20 years. They are very
effective for DX!

73,
Tim K3LR

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