The noise stopped! So, now I don't know if it was my home or not.
Oh well. just glad it's not my rig!
It will probably be back.
A recording in AM mode would be more useful, This recording doesn't sound like AM mode. It's curious that the rep rate is exactly 3 seconds. A graph of the spectrum doesn't show much, but it would be misleading in CW mode anyway. The waveforms are very repetitive, like something you might expect from some kind of battery charger.