> The antenna components of that DA won't take 10KW...but it
> was a nice thought.
Well, there's the answer.
Fortunately, it doesn't seem as if this sort of thing would be necessary. Many of the NOLA stations are on, although running the same stuff. The New Orleans area has plenty of coverage. Obviously, other target cities like Houston are 100%.
Still, this is an interesting intellectual exercise. Instead of relying on Memphis, which is a bit north to bring reliable coverage that far south, I would look more at stations in the 100-200 mile range from the coastline. ON mediumwave (AM) that's one good hop.
There are several stations that would fit the bill, and some even have daytime DAs that would favor coastal residents. Examples include, but are not limited to, Montgomery, AL (which has 2 10kw stations that would be useful on 740 & 1170); Meridian, MS (WMOX @ 10kw ND); Shreveport (KWKH 1130 with 50kw nights and KEEL 710 which has 50kw days with a pattern favoring the south that could stay on at night); and the previously mentioned WSJC Magee, MS (a station I know VERY well from a past life). There is an 890 in Laurel, MS -- a 10kw daytimer -- but the last time I drove through, it seemed pretty weak. Don't know what's up with that. But, I am sure there are other stations I am not thinking about.
If this were ever necessary, I doubt it would need to stay on long. Guys like Radiosaur or even me could get some sort of signal on-air in most any area in a few days. As long as there is some sort of structure standing, a J-pole can be fashioned for an FM antenna (WKNO used one once when their antenna failed), and a portable generator can be used. AM? Easy. A few hundred feet of #10 will get you on the air. #8? Even better.
And, you may have read that the FCC approved an LPFM to operate for 90 days outside the Astrodome in TX. So, that IMPLIES that they'll be flexible in extraordinary circumstances.
Boy, I have posted too much in the last day or so. I should shut up now.
DE