W9XBY was an experimental station located near the upper end of the AM band that was on the air in the mid-1930s. It was connected to Kansas City’s KMBC, which I have researched quite a bit over the years. Though documentation exists about W9XBY, I have not had a chance to review it and write it up. I stumbled on these ads and posted them both as a reminder of this short era of Kansas City broadcasting history and to myself to dig further into the history of this station. There’s much more to the story but here’s another site that will give you some basic information on the station.