WMHT-FM is the callsign of a classical music and NPR radio station licensed to Schenectady, New York, it is sister station to WMHT, a member of which organization?
WMHT-FM:  It is sister station to WMHT, the PBS member station for the Albany/Schenectady/Troy market. WMHT (TV): WMHT "PBS 17" is the PBS member station for the Capital District of New York State (NY).
PBS