New York FM Radio Stations
The April 20 Billboard announced that New York City was getting three new FM radio stations-- WGYN, WAC-FM and WHNF-- which would be joining WQXQ and WABF, bringing the total to five. However there were less than 50 FM radios in the city capable of listening to these stations.
According to this Wikipedia entry, FM radio had suffered a big setback in 1945 when the FCC changed the broadcast band, rendering existing sets and stations obsolete. Some claimed this was at the work of politically influential David Sarnoff of RCA, which owned NBC and was heavily invested in AM radio and television. According to this theory Sarnoff wanted to cripple the push for FM radio and had launched a campaign of disinformation against it. Temporarily FM radio stations were still operative on the old bands. At this time FM broadcasts mostly duplicated AM broadcasts although the powerful musician's union had raised objections to this practice.
At the April 10 meeting of the American Association of Advertising Agencies at the Waldorf-Astoria, Abbott K. Spencer of J. Walter Thompson predicted that FM radio would not be considered an important vehicle for advertising over the next few years. He thought it would be at least four or five years before one-half of radio homes would be able to receive FM broadcasts. Only about 20 percent of the sets that would be manufactured in the next two years, he predicted, would be able to receive both AM and FM broadcasts and the existing audience for FM was negligible. He also noted that an expensive FM receiver was needed to enjoy the full benefit of FM sound. However, he noted, this was also true of AM receivers and AM sound. He added that the broadcast range for FM was considerably greater than its detractors claimed.
The more upscale publications like The Sunday Times and The New Yorker were carrying ads for FM radios encased in dark wood furniture pieces and generally bearing a high price tag; Stromberg Carlson was a leading brand. However television sets appeared to have a higher priority with consumers, although there were only a few hundred in operation. FM radio would not be established until the 1950s and it took another decade for it to challenge the dominance of AM radio.