DG02816 said:
1060 is NOT weak; its problem is that it is very directional with a tight NW-SE figure-8 pattern protecting 1050 in NYC, and 1060's in New Orleans and Mexico City, with the Mexican running 100 kW during the day.
Even though 1060 is 50 kW-U with half-wave towers and 610 is 5 kW-U with electrically shorter towers, the two stations provide almost identical daytime coverage because of similar directional patterns and 610's lower dial position. At night, 1060 has the edge outside the market because, as a Class A AM, it has protected skywave coverage. In 2011, however, nobody is willing to assign any economic value whatsoever to the skywave coverage.
CBS probably should combine 610, 1060, and 1210 at one transmitter site. If they were to add one tall tower roughly midway between the two existing towers at the 610 site, a triplex would be possible, with 1060 using the new tower plus the existing southwest tower. 1210 would use only the new tall tower, which would be 205 degrees at 1210, but could use one of the shorter towers as an auxiliary. From what I hear about the soil conductivity near the present 1210 site, this move would significantly improve 1210's coverage. 1060 might take a small hit in coverage. The new tower could be half wave at 1060 but the existing southwest tower is only about 130 degrees at 1060. Together, these two towers would probably meet Class A efficiency requirements at 1060, but only just barely.
