KB1OKL said:
In any case, how does a momentarily annoyed listener far outside the normal coverage area and market affect a station?
This is exactly the kind of self-centered thinking that can do over the air radio in. These listeners go to Satellite or computer. I would be nice to my listeners if I were a broadcaster, wait and see what happens when long range Wifi becomes a reality. Over the air radio is eating itself, you guys should be sticking together not ruining other people's signals just because you're (at this present time) a big boy. Big Boys fall hard.
Start with the fact that AM is dying. There is likely no cure for the malady, either. Two generations of listeners have grown up on FM, and simply will not listen to AM.
This is why, when traditional "Rush and friends" talkers move to FM, the 25-54 listening explodes. Those in the "sales demos" (mostly 35-54) who are interested in talk don't listen on AM. They do if the AM format is moved to FM. There are dozens of conclusive examples all over the country.
WiMax is years away, particularly since Clearwire and Sprint had their falling out. But when a suitable distribution platfom is viable, radio will use it to distribute content, just as streams, podcasts, etc. are available on the Web and on devices like the iPhone.
In general, AM radio programs for the local market each station is in. That is where the ratings, whatever they are, are monetizable or, if the station is a bad facility, as most metro AMs are, where the brokers, preachers and niche ethnic communities exist and which can buy blocks of time to sustain the station.
And, again, the hours when skywave is "enabled" are hours when all radio, and AM in particular, have very little listening. Anything, like HD, that might enhance AM and listening in general, is a safe bet with no risk.
Remember, there are only a few AMs... probably in the range of 100 or so... that create any usable skywave... the original 1A clears and most of the 1-B's and a few others. The rest are on such congested channels that even night usage inside the local market is hapered by interference to the groundwave signal by distant skip.