I developed quite a hatred for the Cuban 670 growing up in central Ohio in the early to mid-1990s. Many nights, I could not listen to Bulls games because of that station. I don't remember hearing it much before 1992 or 1993, but man, when the conditions were right, it blanketed 670 to the point that you couldn't even hear WMAQ by turning your radio. It was that strong, and in that pre-Internet age, it was very frustrating.
I still hear it from time to time nowadays here in Ohio, but never with the punch it used to have. Most nights I can hear WSCR quite well. The later, the better.
Good point. Years ago when I would visit New Orleans where we had relatives, 670 then WMAQ came in very well with little to no interference. In later years it was obliterated in the deep south.