KXLF Butte, Montana with their Top 40 format was many times the channel dominant on 1370 kHz in 1970 in Spokane. Their signal would boom in so strong, that they sounded like a local. I thought it would be cool to send them a reception report and they replied with the QSL sheet below.
Now KXTL holds down this channel in Butte. I heard them with oldies in July 1994. As of this writing, their format is Talk Radio. (Scroll for the audio clip of this reception.)