29 January 20

The Russian Woodpecker was an over the horizon radar which was erected near Chernobyl and interfered with amateur radios, tvs, and regular radios. Did the amateur radio community try to jam the Woodpecker
A. Yes
B. No
Answer A…To combat this interference, amateur radio operators attempted to jam the signal by transmitting synchronized unmodulated continuous wave signals at the same pulse rate as the offending signal. They formed a club called “The Russian Woodpecker Hunting Club”. Core group members would frame the “Official Practice Target” in their radio shacks

More can be found at Mystery Signals as well as the “Official Practice Target”.  This website also has other Mystery Signals mentioned and one that they did track down….. Mystery Signals