Why don't voice radio communications use FM?

"Mxsmanic" wrote in message
...
Ron Natalie writes:

No actually, it's just historical. Early av radio used AM, and for that
reason we still do.

If that were the only reason, nothing would ever change in aviation.


Actually, not much does change in aviation compared with other fields of
human endeavor . But changing to FM would require a new radio to be
simultaneously installed in every cockpit in the world. The only way to
accomplish that would be for every plane with a new radio to transmit in
"parallel" (as someone already suggested) for a period of years on both the new
mode and the old mode. What are the chances of AOPA allowing that to happen?

That said, I would really like to see it. It would be great to have enough
frequencies to go around so that you would not have to be constantly mentally
filtering out the transmissions from adjacent uncontrolled airports.

Vaughn