WPKN

WPKN (89.5 FM) is a non-commercial radio station licensed by the Federal Communications Commission (FCC) to Bridgeport, Connecticut. WPKN is a freeform radio station, staffed by volunteer programmers presenting a wide variety of music and public affairs programming. The syndicated weekly radio news magazine "Between the Lines," a bi-weekly show hosted by environmental journalist Jim Motavalli is produced at WPKN.
History.
WPKN was founded in 1963 as the college radio station of the University of Bridgeport, but became independent of the university in 1989. The call letters originally stood for "Purple Knights Network," named after a university sports team.
Many stations below the 92 MHz FM band receive funds from commercial entities despite being part of the non-commercial radio band. This is thought by some to present the potential for conflicts of interest. WPKN only takes funds from private donors with no stipulations for their expenditure attached. This allows the music and news programmers complete freedom to produce their own shows with no outside pressure. 
WPKN also had a Carrier current on 540 AM.