KX3 - broadcast band interference ??

Posted by yo8sep on Dec 21, 2016; 11:05am
URL: http://elecraft.85.s1.nabble.com/KX3-broadcast-band-interference-tp7624847.html

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.

I've made a short video, sorry for the poor quality. https://www.youtube.com/watch?v=CX7fr6Iwg-Q
 
If I changed the RX SHIFT settings to 8KHz, I still could see that signal on panadapter (NAP3) but audio was shifted to 8kHz.

What could cause that problem/interference ?

73,
Petronel
YO8SEP