Participants in the ARRL WD2XSH 630-meter experiment, Canadian radio amateurs, and members of the Maritime Radio Historical Society (MRHS) will participate in a special event on Sunday, November 13 (UTC) on 630 meters (the evening of Saturday, November 12, in US time zones). The event will commemorate the Berlin Treaty of 1906 that made 500 kHz the International Distress Frequency. US Part 5 Ex...
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