I have noticed in very recent years how much better WGN can be received in southwestern Ohio at night than in years past. I can remember back into the early 1960's when WGN's night-time signal was basically swamped by WLW in this area. This included a number of radios I had access to at that time. The best chance of hearing WGN was on an old Halicrafters table-sized set that had an AM band. Now, on just a table-model radio, the WGN signal comes in great on most nights and has no overlap from WLW whose transmitter and tower are about 20 miles from my home. Did WGN do something to assist with their signal reception here (and perhaps elsewhere) or would it be something else?