taylorengineer said:
WCNN 680, the 1080 site in Marietta, and possibly the 790 site near downtown might be usable. The Douglasville cp at 1520 might also be a candidate for an all east lobe.
None of these sites would provide a listenable signal over most of the metro area. Even an intense signal created by a highly directional pattern would have a difficult time overcoming the massive skywave interference on 1010 khz.
WCNN has good nighttime reception...as long as you are in their pattern and not in that hard null over Gwinnett. They're only 10k night.
The problem I see with most existing AM arrays/patterns is that they miss the northside, especially the NE side. This is a big problem for WQXI and WCNN already. WATB would be the same, if not worse with their array already east of town in Scottdale.
My daughter says the WDWD array in Powder Springs does an okay job at night with only 4500W, although the skywave interference on that regional channel is intense near the edges of its pattern. 1080 and 1520 might work with enough wattage, although getting enough northside coverage would be tricky, especially with Douglasville.
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The 1010 near Black Mountain NC going Class D,
http://boards.radio-info.com/smf/index.php?topic=196595.0
They might be able to get more than 25KW. WGUN, due to depressed land prices, might be able to swing a site farther West and a little North (southwest of Rome) and cover most of the market. They could even move the COL if needed. WINS 1010 in NYC is able to make a Canadian Clear work. If a strong signal can be worked out LMA it to CBS. CBS has several AM all news operations and IIRC just put one in Dallas / Fort Worth last year. With the lack of FM signals in Atlanta, I doubt if they get challenged on FM soon.