"WBRW" wrote in message
...
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.

Yet today, with noise and all, anything beyond the 5 mv/m contour is
pretty useless.

But what if you're in Nowheresville, Wyoming, and a few 5 mV/m AM
signals are all you've got? Tough luck, I guess?

Yep. Skywave AM is essentially dead. I have driven at night across Wyoming,
from the NW down to the SE. There are FM signals everywhere. In the daytime,
many areas have no AM signals, while you can get a minimum of several FMs.

FM, especially after 80-90, has given nearly every part of the country
multiple FM signals, including areas where there was no day AM coverage.

Radio is essentially a local, single market medium. It is definitely treated
that way by advertisers.