The IARU Monitoring Service for Region 1 has published its April newsletter. It talks about emissions that are often received on the 40 and 20m bands with a bandwidth of about 8kHz. Thoughts are that it could be a jammer where the signal is intentionally transmitted over other transmissions in order to disrupt or nullify their reception. The newsletter includes a report by Richard, G4DYA, the RSGB Intruder Watch Coordinator, that includes many radar sightings. You can read more at iaru-r1.org.
via Radio Society of Great Britain – Main Site http://rsgb.org/main/blog/front-page-news/2022/05/13/iaru-monitoring-service-newsletter/