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 o…
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