106.1 won't work for WRBB because of the blanketing interference from the Pru. There are NO frequencies that will work well for them to move to...not without a huge increase in power (at least 500 to 1000 watts from their current height) and there is no way that can be accomplished on any frequency.
FWIW, there are certain assumptions in play here: first is that as "college radio" formatted station staffed entirely by students, the signal must cover the campus thoroughly to be considered a success by the students, faculty/administration, and most potential fiscal supporters. No Class D-level station is going to do that, not where NEU is located (so close to the Pru).
Aaron, does WZBC put down a strong enough signal on the Northeastern campus for a hypothitcal HD2 signal ? Would there be any advantage to WRBB having a simulcast WRBB 104.9FM and WZBC-HD2?
Possibly but I doubt it. WZBC is only 1000 watts which means a theoretical maximum of 100 watts HD (-10dBc), probably morel like ~10 to 40 watts. (roughly -20 to -14dBc) Granted HD signals are far more efficient, but WZBC still has pretty low height. It's workable for 1000 watts of analog but I would expect the HD to not travel very far....especially with Aspinwall and Fisher Hills inbetween.
Not to mention that it would be a very expensive proposition since HD Radio receiver penetration is so low, that WRBB would have to buy an awful lot of radios to distribute or re-sell (at a hefty discount) to their campus community.
Honestly the dynamics of listener demographics are becoming very polarized when it comes to "college radio". The utter destruction of the internet on the monopoly radio used to have on both music content and quick-distribution of information means that you really have to fight for every listener. The old paradigm that most college radio stations still cling to is essentially unchanged from the 1980's, yet that paradigm has zero relevance in the modern age. To be fair, it has near-zero relevance for most radio stations (even public radio, although I'd argue we're better suited than most to make the transition) but most commercial stations have big enough signals that they can still attract a constantly-aging demo that grew up with radio and is still willing to listen...largely because for Class B and bigger FM stations, radio still has unparalleled simplicity when compared to a smartphone, especially in the car. Turn key, push button, turn knob, get content.
That simplicity dynamic doesn't work for most AM stations, save for the huge Class A "clear" channeled stations like WBZ, because the audio fidelity is inferior to FM/MP3. And it doesn't work for most below-Class-B-level stations because the signal's too small to reliable receive everywhere the listener goes (home, work, commute).
It's doubly true for college campuses where a dwindling number of 18-24 yr olds even
OWN a radio, outside of their cars. And they don't listen in the car, either.
That's a long way of saying that realistically, WRBB really ought to go big or go web. If they really want to serve a listening audience, they need to purchase a Class B FM or maybe one of the better Class B AM's. (yes, I'm well aware of what that entails) If they just want to be a fun student activity (which is perfectly fine, btw) then they'd be better off selling the license for whatever they can get and plowing the cash into expanding their web offering. It'll reach more of their target audience and it removes the headache of FCC regulations. There is no inbetween those options: anything else is just a waste of time and resources.