aaronread said:
WGBH is actually listenable enough on the cape that they didn't need 'NAN,'CAI,and 'WZAI to put out the signal.
I think at least one of those Cape and Islands signals was added back when WGBH-FM was preparing to move to the CBS tower. That move would have meant powering down somewhat (not all the way to Class B, but essentially to a height-adjusted ERP that would have been half of the present ERP). But the FCC wouldn't buy the short spacing to WZBC, even though I believe that WZBC didn't object. Anyhow, with the relaxation in third-adjacent spacings that seems to be in the cards, I guess WGBH might yet move to the CBS tower and the the outlying stations might yet become necessary.