WLS tried to move to Grace and Fullerton in the 1970s. It's on the History Card. I noticed how weak it was when I first visited my relatives, who lived just three miles SE of WJJD's towers, in 1962. WLS was noticeably noisy on my Uncle's transistor radio, a big boxy Zenith about the size of an old RCA Field Strength Meter with the 1.5 V filament batteries and 67.5 volt plate batteries. I always wondered why WCFL didn't do better in the ratings with a signal 5 times stronger in the Northern parts of the market. In case you don't remember, almost all transistor radios circa 1960 were insensitive like this. Anyway, WLS ran into a few obstacles trying to relocate, and fixed their ground system and decided it was good enough where it is. However, the target demographics now would favor a better signal in the Northern Suburbs. It's probably hurting for that reason. WCPT listener types think its the programming.