I first noticed the station, a bit north of Northampton, and I continued to receive it on I-90 heading west, until it was overtaken by 101.7-WBRK-Pittsfield. It sounded semi-professional, with a half way decent too.
As I also mentioned before, they were broadcasting in mono. This was at about 1AM Friday night. Perhaps it is a pirate, that broadcasts rather selectively....