Out here in DeKalb, WLS actually fades in and out like a distant nighttime blowtorch like KMOX does with skywave. That never used to happen in the 1970s. Growing up in Calumet City, WLS melted my radios, but the other 50 kw blowtorches came in just fine.Yes, and even 15 mV/m doesn't cut it in some areas, and certainly not inside steel buildings. You often need 25 mV/m outside to even hear the signal at all, and 100 mV/m outside the building to hear it well inside.
Speaking of diplexing, WBBM comes in noticeably better in DeKalb now, even with their slightly reduced power. I attribute that to a nicer ground plane…and also, a more efficient tower. I was in Dubuque, Iowa recently and noticed that I could pick it up out there at night...which I couldn't before. It was always the weakest of the 50 kilowatters besides WLS.
I wonder if WBBM will apply to get 50 kW again day and night. I'm also wondering if they settled for the reduced power so that they didn't have to wait forever to get approval for diplexing. Either way, I haven't been on I-355 in a while… Is the old WBBM antenna and tower site still there?