Although FM Radio was patented in 1933 by Edwin Armstrong, no actual FM stations went on air until 1939 when licenes were granted for a number of "experimental" FM outlets.

The first was W1XPW which became W65H and finally WDRC-FM in Hartford, Connecticut which started experimental broadcasts in June 1939.

Then W2XDA which became WGFM in Schenectady, New York - that went on air in Nvember 1939.

Then came the third experimental station, W47NV which became the very famous WSM-FM in Nashville, Tennessee and which came on air in 1941.

When the experiments were over, the FCC announced it would start licensing FM radio outlets as and from January 1941.

Nearly all of the early stations were classical music formats - and this situation continued into the 1950s.