Armstrong authorized to build Alpine FM stationJun 12, 1936Labels: Edwin Armstrong, Alpine Station, W2XMNFCC CardsW2XMN
W2XMN begins experimental FM transmissionsJun 1, 1938Labels: W2XMN, Edwin Armstrong, Experimental StationW2XMNWA2XMN
First public W2XMN broadcast relays WQXRJul 18, 1939Labels: W2XMN, WQXR, Public BroadcastW2XMNUSA Museum
Yankee Network launches regular-schedule FM serviceJul 24, 1939Labels: W1XOJ, Yankee Network, MassachusettsWGTRMBC FM
NBC starts regular FM broadcasts in New YorkJan 11, 1940Labels: W2XWG, NBC, Experimental FacilityWQHT
First commercial FM construction permits issuedOct 31, 1940Labels: FCC, Construction Permits, Commercial FMFCC ListMBC FM
First university-licensed FM station begins serviceNov 22, 1942Labels: University of, WIUC, WILL-FMWILL FMMBC Edu
High-band Alpine companion station authorizedJan 1, 1945Labels: W2XEA, Alpine Station, High BandKE2XCCFCC Cards
FCC reallocates FM to 88–108 MHzJun 27, 1945Labels: FCC, Frequency Reallocation, 88 108NAB Radio100Radio US
Dual-band transition to new FM frequencies beginsJan 1, 1946Labels: Dual-band Transition, Broadcasters, ManufacturersRadio USKE2XCC
Coast-to-coast FM-only network program conductedSep 28, 1948Labels: FM Network, Coast-to-Coast, Multi-station1948 Radio
Low-band FM broadcasting ends in the U.S.Jan 8, 1949Labels: Low-band Shutdown, FCC, 42 50Radio USArmstrong
FCC selects Zenith/GE as FM stereo standardApr 19, 1961Labels: Zenith GE, FM Stereo, FCC StandardCrosby
Educational FM reserved at 88–92 MHz growsJan 1, 1963Labels: Educational FM, 88 92, NoncommercialMBC EduRadio US
