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He did a quick test call. "CQ TEST K8DX."
He saw the page: "CTY.DAT for amateur radio use — last updated November 2024" cty.dat download
It was the night before the CQ Worldwide DX Contest. Marcus, call sign K8DX , was a serious amateur radio operator. He had his beam antenna aimed at Europe, his amplifier warmed up, and his logging software— N1MM+ —open on his laptop. He did a quick test call