Normally, 1660 KHz is dominated here by Spanish format KTIQ in Merced, California. I was surprised to tune past 1660 early on Saturday evening to hear Country & Western music. The top-of-hour ID was "Willie 1660 AM" who turned out to be KQWB in Fargo, North Dakota ... state #29 for me on the broadcast band! Not only was it dominating the frequency with an S9 +10db carrier, there were no other stations to be heard ... not even a whisper of KTIQ, normally heard weakly, even when looping to the east.
Their 5 tower array is evidently doing a good job, when propagation favors the eastern path as the antenna pattern has a strong western component while nulling the east.
"... all country legends. This is a Taylor Swift-free zone, Willie at 1660 AM".
KQWB was logged at 0300Z (7 PM local time) using the 10' x 20' loop and Perseus SDR.