Greetings Ash,
This is interesting and informative data - thanks for sharing!!
73 Joel W5ZN / ZF2ZN
p.s. see you Vienna in September????
-----Original Message-----
From: Topband <topband-bounces+w5znjoel=gmail.com@contesting.com> On Behalf Of
Ashraf Chaabane
Sent: Tuesday, January 27, 2026 3:00 PM
To: topband@contesting.com; skimmertalk@contesting.com
Subject: Topband: WW160 RX ant pattern
Hi All,
In preparation for the CQ WW 160m CW Contest 2026, where family commitments
precluded serious operating, I conducted a focused receiving antenna experiment
at my farm.
I deployed a directional RX array consisting of a broadside-phased pair of 220m
Beverages, 120m spaced, beaming toward North America (320°), a 200m Beverage on
Ground (BoG) targeting Japan (44°), and a 60m BoG directed toward Southeast
Asia (91°). These were connected to two Redpitaya receivers running Skimmer
Server and an SDR-IQ with CW Skimmer, with all spots filtered through SkimCon
software to eliminate duplicate spots before RBN submission (3V/KF5EYY node).
SkimCon preseves a raw data log with skimmer number associated to each spot,
for analysis.
Subsequent data processing by Excel and VBA produced a radar plot that clearly
visualizes each antenna's dominant contribution in its intended beam heading,
along with the identifiable effects of its side and rear lobes, providing a
real-life quantitative assessment of their directional performance.
I was impressed by the performance of the Broadside Phased beverages. In
multiple occasions, I was the only station outside North America that spotted
US stations.
The Radar Chart can be found here: https://www.kf5eyy.info/topband.htm
73 Ash KF5EYY/3V8SS
www.kf5eyy.info
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