"Brenda Ann" wrote in message
...

| "Telamon" wrote in message
|
...
| 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.

| Brain fade.. I accidentally posted this response in the wrong thread (then
| inadvertantly clicked too many times and sent a blank answer here)

| I can't vouch for the exact math, but it has to do with ground conductivy
| and I squared R losses versus frequency. Lower frequencies have better
| ground conductivity (hence ground wave) than higher ones. Much more of the
| signal is sky wave at the high end of the dial. Many 50KW stations on the
| high end of the dial don't even cover their service areas at night (When I
| lived in west Portland, OR, in the 70's, I used to get nearly as much signal
| on 1520 from KOMA in OKC as I did from (what was then KYXI) on the same
| frequency a few miles away in Clackamas.

This is the authoritative source: http://www.fcc.gov/mb/audio/73184/index.html
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