In article ,
"David Eduardo" wrote:

"Michael Lawson" wrote in message
news:16b7f$427a2948$d8c4c9e6 That big
test is happening now in Cincy, where some of AA's
content is on one of two clear channel stations
in the area (WCKY). For comparision, Rush, Savage
and the gang are not on the other clear channel station,
WLW, but are on 550 WKRC, which has significantly
less reach than WCKY.

550 has better daytime coverage and overall coverage of the local market
than 1530. As a rule of thumb, 1 kw on 540 is equal to 50 kw on 1600 at the
same location, so 550 and 1530 are going to get about equal local
coverage... with 550 winning in some areas.

Snip

What is the basis of this power/frequency rule?

--
Telamon
Ventura, California