I am having a very specific problem with two radios in my apartment. One is a clock radio; the other is a shelf audio system. Both have digital tuners and happen to be made by Sony.

The only FM station I listen to is 93.9, which is my local public radio station. Neither of these radios has ever had a problem receiving this station in the past (I live right downtown). I moved apartments and now both of these radios (a) have trouble receiving this station and (b) often play a different station, 95.5, when tuned to 93.9.

I have tried various antenna configurations for the shelf system and placements of the clock radio. Sometimes I can improve the reception of 93.9, but other times, my efforts just increase the interference from 95.5 to the point where all I hear is that station.

What's going on here?

NB: There is also an analog-tuned clock radio on the other side of the bed, which seems to have no trouble with this.