"Frank Dresser" wrote in message
...


Problem was, people didn't like stereo enough to buy another radio. And
it's not as if the radios were real expensive. They wouldn't buy four AM
stereo standards. They wouldn't buy even one.

By the time in the early 80's when a standard, CQuam, arrose, AM was no
longer a music medium and had less than 40% of all listening.

Actually, people didn't care much about FM stereo, either. FM stereo
didn't
reach mass market appeal until it was almost a give-away with the radio.

Untrue. FM Stereo was introduced in about 1961, and the decade before had
seen total FM stations go from over 1000 in 1950 to around 500 in 1960.

What changed FM was not the technology, but the FCC's 1967 ban on FM
simulcasts with a parent AM station. It was the diversity of formats that
came out of this that sold FM.