But 50 kw now is not the same as when KDWN came on... the #1 station was KENO on 1460 with night power that was about the same as a tower beacon.They'd have gladly run 50 kW from up there, too, but the configuration of the towers and the needed protections to not only WGN but also several signals on 710 forced the limitation to 7500 watts at night.
So advertisers were shown all that extra selling power, and it worked for a little while except that the station was not well rated and did not sell. And then FM happened.
It's been a long time since AM power was a selling point.