[600MRG] MF Critical Hours

[Andy - KU4XR]

Greetings gentlemen:

This is a term familiar to daytime A.M. radio stations .. and here is a snip from FCC link

https://www.fcc.gov/media/radio/am-critical-hours   .....

" For AM broadcast stations, the term critical hours refers to the time periods of sunrise 
to two hours after sunrise, and two hours before sunset to sunset.  During these periods, 
the ionosphere has commenced its transition from daytime to nighttime conditions 
(or vice versa), resulting in greater coverage than would be expected from a daytime-only 
analysis. "

Give it a try ... You might be surprised where your signal shows up during that time..

Greyline conditions show enhancement also.. The WSPR stations in the NE come in
strong here near Knoxville, TN. in the hour before local sunset, where many of them are 
already just past sunset there..

73 to all, and good DX :

Andy - KU4XR