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Remember that WARK is off the back of WTOP's pattern. WTOP has something
like 1.5V/m @ 1 km toward WARK, not the 4+V/m like the front of their pattern, or the 2.8V/m RMS of the pattern. The stations are about 54 miles apart. "Mark Howell" wrote in message ... I certainly hope so, since they are 30 kHz apart. But there is a real problem with first-adjacent channel interference. I reference a statement submitted by Clear Channel SVP/Engineering Jeff Littlejohn to the National Radio Systems Committee regarding a test involving WTOP, Washington (1500) and WARK, Hagerstown, MD (1490). Daytime interference from WTOP's digital signal was found to be "significant" at WARK's protected 0.50 mV/M contour, and "noticeable" at its 0.75 mV/M contour. The full report can be found at http://www.am-dx.com/clearchannelrprt.pdf Mark Howell |
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