clouseau said:
IBOCers don't hate DXers. They HAVE been know to ridicule DXers when DXers think we should write interference rules based on their hobby rather than actual radio listening patterns. Much like I would suspect railroads would ridicule caboose lovers if they try to write "Pro Caboose" legislaion because "It's harder to see the end of the train coming now without a caboose". We don't use cabooses (caboosi?) anymore. We'll all just have to adjust. You do know basically no one cares about cabooses or DX, right?
And here's the part where I get to disagree with the Inspector
While I'll gladly agree that listening patterns have changed dramatically since KB1OKL's favorite radio (you know, the one with the Famous Ball o' Wire on the floor next to it) was made back in the thirties, the laws of physics haven't. This is problematic for some of the staunch supporters of AM HD. I vividly recall having lunch at an NAB show a few years ago, sitting right across from a Very Well-Known IBOC Proponent who earnestly explained to me that in a few years' time (a decade, I think it was - and this was three or four years ago already), all AM would be digital.
"So how will that work with skywave interference?," I asked him.
"Oh, there won't be any skywave," he replied.
Well, nobody practicing radio engineering in a position of authority should need to be told - by a DXer or anyone else -that signals in the medium-wave band, whether analog or digital, are still propagated by skywave at night.
Nor should they need to be told that as the number of stations on the band is increased, thus increasing the background noise level on the band, transmitted power levels need to be increased to keep groundwave coverage areas consistent. But all that added power gets out by skywave, too, thus increasing background noise levels even higher, thus forcing power levels to go even higher to keep up, and the vicious circle continues. (See: "Graveyard Channels Increase to 1000 Watts at Night," circa 1980s, for details.)
I'm not disputing the point that nobody at WBZ cares anymore about whether the station can be heard at night in Rochester or Roanoke. (Heck, it's not clear, after last week, that anybody at BZ really cares about nighttime service to freakin'
Revere, but I digress.)
My point here is that the DXers seem to understand, far better than, say, your average Ibiquity executive, how MW signals propagate - and how you can't stop them from propagating no matter how much you might like to legislate skywave out of existence.
So while I'm not arguing for interference rules based on DX hobbyists' desires, I do think it would be nice if we had interference rules based on propagation realities, rather than the wishful "there won't
be any skywave" desires of the system's promoters. I think it would be even nicer if we had interference rules that recognized the unique nature of the MW frequencies, and that allocated at least a few wide-reach frequencies to broadcasters who would actually take advantage of the power of nighttime skywave. (But then, I spent some time, 20 years ago, living and traveling in one of those radio "white areas" that tend to get swept under the rug in such discussions.)
Where I probably differ from KB, though, is that I'd be equally interested to see what could be done with all-digital service over a powerful clear channel at night. If the AM dial has really become as worthless as we're being told it is, what's the harm in trying at this point?