Unknown source of local interference
I had to move one of my Kiwi antennas to another point around the house and it picks up a new source of strong wideband interference, making reception in the range from 1350- 4900 now nearly impossible.
The signal is horizontally polarized ( it is not seen using a vertical loop ), shows peaks every 29 KHz and has a distinct left edge.
I include some screenshots in the hope that somebody does recognize the sort of equipment that can cause this. Having already powered down all electricity in my own house without success, I suspect the source is in the house of my less than cooperative neighbour.