"660 KTNN in Window Rock, Arizona, is an interesting station broadcasting from (and to) the Navajo reservation. It seems like a big signal for a pretty narrow segment of our population, but it's interesting to listen to for a while with its mix of traditional Navajo chant and classic country -- and serves a population that is spread over a pretty wide area of the southwest. I'll give them a pass, and say I am glad they are on the air."
660 is a tremendous station, covering several states at night, and carrying the Midnight Truckers Network 7 days a week 10P-3A MST. In some areas of Arizona and the S.W., it's the only "listenable" nightime talk radio show other than C2C or NPR. Recently, the show format seems to have changed with more discussions of Oil, Energy, Politics, and History. Gary McNamara is a very authoritative speaker and the show is worth a listen even if you're not a trucker. Eric Harley has a very mellow voice that balances Gary's very nicely. Eric does remotes sometimes
As for the reservations, they need 50kW to cover everywhere. A 5kW wouldn't do it. 660 is directional at night, only.