Medium Transport; High Wing; 2 Turboprop Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 3
ATC Issue All Types; Conflict NMAC
General None Reported / Taken
ATC Equipment / Nav Facility / Buildings; Human Factors
I was providing on the job training to a CPC in training. Traffic wasn't that busy or complex. We took radar on [an aircraft] but never got him on frequency. We reached out to him a few times with no response. We believed he was too low for radio coverage as is common in that sector especially with our frequency at Block Island out of service. Our first contact with him was just prior to exiting our airspace saying he would like to report a near mid air collision. We got the information from him and advised we did not have communication with him nor did we see any traffic for him in the mentioned area at the time he traversed the area. The nearest traffic that may have been the one in conflict was orbiting off the coast of westerly WST at 1;200.
PVD TRACON Controller reported taking radar on a VFR aircraft; but was unable to initially contact him via VHF. When the aircraft did come on frequency he reported an NMAC. An ATC radio outage may have prevented initial contact; but no NMAC was observed on radar.