UNID 6973.7 was 6906.6 and 6925 AM 1837 UTC 19 Sep 2019

[ChrisSmolinski]

1837 Just signed on, SIO 333
1840 Off

1857 About an SIO 333 on the netSDR/horizontal sky loop on 6906.6

1903 Now on 6973.7

1934 Back on 6906.6, some hum in the audio.

[WWBR]

Playing light piano/meditation music. Just above noise on Chris' kiwi, SIO 252. S6, weak audio, on NA5b kiwi in DC. SIO 253.
Off at 1859 UTC.

My guess is that this was the VFO drifter seen just before sign-on, throughout 43 and 40 meters.