The call sign change actually took effect in mid December 2022, but I just discovered it this evening while doing some random web surfing. The sale of KNAK was consummated on December 13, 2022, but when I last checked the two local Utah SDR's, 540 was still off the air. Of course, the Delta station previously held the KNAK call from 1979-2011, and 1280 KZNS was known as KNAK from 1945 to 1976. Maybe the new owner of the station has an affinity for heritage Utah radio call letters. 🙂
The station website is back online under the old "Yah Radio" branding, and KNAK claims to be "on air now". However, when I was listening to the Northern Utah SDR about 1:00 PM this afternoon, I heard CBK in Saskatchewan on 540! I checked the CBK audio stream online, and it was parallel to the signal I heard on 540 on the SDR. Weird! I didn't think it was possible for AM signals to travel that far during the day.
50kW at the very bottom of the dial will get out really well. Plus, I know in the US part of the Great Plains the soil conductivity is excellent and I would guess that extends up into that part of Canada as well. That helps even more.