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IARU Region 1 Monitoring System Notes New Russian OTH Radar on 20 Meters


The December newsletter of the IARU Region 1 Monitoring System (IARUMS) reports a new intruding Russian over-the-horizon (OTH) radar signal on 20 meters, audible in Euroope. IARUMS monitor Wolf Hadel, DK2OM, said the 10 kHz wide OTH radar signal often jumps frequency. He has posted a sound file. Others posted reports of OTH radar signals on 15 and 10 meters. Hadel also reported the occurrence of taxi dispatch signals from Russia across 10 meters is “worse than before.”

In the past, he has reported hearing numerous taxis, most from Russia, intruding on 10 meters on FM. “You can hear a female voice operating the base station and a male voice in the car,” he said in a 2010 account. Other intruder signals spotted include European “fishery traffic” on 80, 40, and 30 meters USB. Individuals may log reports of Amateur Radio band intruders and monitor the short-wave bands online with a web-based SDR receiver.



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