On Sep 29, 8:32 am, David wrote:
On Sat, 29 Sep 2007 06:56:42 -0400, Ron Hardin

No, the limiting thing is what else you can hear, not what
their power contours are. There's a thousand skywaves on the
frequency just as strong, at night. That's the benefit
of having a clear channel and contour protection, which
no longer applies on most frequencies.

I'm very familiar with the graveyard freqs. I enjoy listening to KOY
at night when I'm in Tempe. They have a pretty much identical setup
as the Columbus station.


Ya know, Hybrid Digital Radio has an option for 20 kilohertz wide
channels (the center 10 for AM, and the adjoining 5 kHz sidebands for
HD).

If the stations simply switched from 30 kHz mode to 20 kHz mode during
nighttime operation, that would help minimize interference to the
skywaves.

(But no the FCC lackeys never thought about that. Dummies.)