Topband: WW160 RX ant pattern

[w5znjoel at gmail.com]

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 at contesting.com> On Behalf Of Ashraf Chaabane
Sent: Tuesday, January 27, 2026 3:00 PM
To: topband at contesting.com; skimmertalk at 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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