Total posts : 45366
The buzz heard here at 1700kHz does have a de-modulation component, very garbled and unpleasant to the ear, but to the determined listener it is identical to the audio at 850kHz.
The station at 850kHz signs off at one hour past local sunset, we being on central time. The station it protects by signing off is on mountain time, KOA, Denver, 850kHz.
At first I was disappointed by the buzz, because it prevented our using 1700kHz, but when nighttime comes, there are some strong signals that come in at 1700, and it turns out that 1680 is better at all times of the day.