Most of the FM stations that went on Empire moved there beginning in 1966, as the Alford master antenna provided transmission capacity for more than a dozen signals. Until the Alford, the only FMs that were on Empire were associated with TV stations and shared their antenna apertures. WNBC-FM on 97.1 was the original FM there (NBC had exclusive transmission rights at Empire until the early 1950s), followed later by WCBS-FM, WABC-FM and WOR-FM.
The Alford made it possible for the "independents" to join the club up there - 92.3, 93.9, 96.3, 97.9, 98.7, 99.5, 101.9, 102.7, 104.3, 105.1, 107.5 and then later on 106.7 and finally 100.3 made up the Alford combiner roster before it was supplanted by the current ERI master antenna in the late 1980s.