Sorry, I was not entirely clear in my previous response.
The S7 noise was when the antenna was re-connected,
at about 9PM local time.
When I disconnect the antenna, it goes to S0.
I tried another cable, and I still get S7, on 20M, at 10AM local time.
I also turned off all power in the house to all circuits, except my radio power.
And nothing else was on this circuit. And I still get S7.
