Elsewhere on the site there is a brief reference to the FCC granting AM stations local FM translators for "fill-in" of service. Might work for WDJO.
All they need to do is find an already existing translator, buy it & ask the FCC to allow 1480 to use it. The catch is, if there isn't one available, they can't drop one in. And with a coverage area as large as Cincinnati, they'd need several of them to have any real impact. Even if they did get a half dozen of them (all on different frequencies), how do you promote that on air? Plus, they'd be esentially worthless for in-car reception with a typical range of 5-6 miles (on second thought, that's better than WDJO's night signal). However, having one located in the heart of downtown would put them in line for some in-office listening.