Posted by dd92 on December 13, 2009 at 10:50:00:
In Reply to: Re: Dangerously high levels of AM construction posted by Dan on December 13, 2009 at 10:49:16:
Dan, the NIF Contour is 15.5 mv/m which is very much only in the south west suburbs of Chicago. Years ago when I built the AM-820, WAIT, night array in Elmhurst, IL (for previous owners) the signal barely covered the north western city limits of Chicago. WBAP puts a gargantuan skywave into Chicago.
Even though, it was a sad day when that array had to come down and the station put into storage till it was sold....sniffle....sniffle.
: Thanks to the link provided in this thread, I found the new WCPT night site in Google Maps. I also found Willow Springs, WCPT's new CoL. I am suprised at how far south of the CoL WCPT's new night Tx will be. I didn't try to measure the distance on the map but it looked to me like 20 miles or thereabouts. Willow Springs seems to be quite close to the pattern maximum (an inverse-distance field of 1054 mV/m @ 1 km). I know you folks have excellent soil conductivity in your area, but I assume that the NIF contour will just barely cover the CoL. Can anybody tell us what the NIF is supposed to be?