A few days ago I've noticed something strange at my KX3.
If was around dusk and I was on 20m band, USB trying to listen for a very low signal station and got something that looks like an AM brodcasting , but not in a language that I can understand.
The strange thing was that was heard even when tuning to different frequencies.
PRE was on, antenna was yagi 3 elements on 20m, at 12m height.
There is an AM broadcast station at 40miles from me, but the signal I got was on a foreign language, maybe somewhere Middle East...
And it was all over the band, even on upper bands, 15/10. Turning off Pre or turning on RX SHIFT 8KHZ, seems to solve/hide the problem. But that is not really a solution, especially when using NAP3 and CW skimmer.