UNID 11171.0 kHz (centre) 20:30 UTC 28 JULY 202220:30 UTC - UNID with 16 kHz wideband data showed up on 11171.0 kHz (centre) at approx 20:30 UTC. UNID is causing interference to the HFGCS frequency of 11175.0 kHz;
21:10 UTC - UNID signal is persevering;
21:30 UTC - UNID went off the air.
The UNID sound like one of those High Frequency Trader stations.
RSPduo | End-fed longwire antenna