= NOW 15 WPM = TEXT IS FROM JUNE 2021 QST PAGE 56 = THICKER D LAYER WEAKENS THE DAYTIME SIGNALS MORE THAN WHEN SUNSPOTS ARE LOW. FIGURE 1 IS A PLOT OF THE TOTAL LOSS ON A 200 MILE PATH ON 80 METERS FOR HIGH AND LOW SSNS. THE LOSS AT 12 PM IS 30 DB 1,000 TIMES MORE WITH AN SSN OF 100 THAN WITH AN SSN OF 10. IF YOUVE BEEN OPERATING 80 METERS BETWEEN 10 AM AND 2 PM FOR THE LAST 5 YEARS, YOULL BE IN FOR A SHOCK WHEN THE SSN RISES. YOU CAN BLAME THE D LAYER FOR THE MAJOR LOSS OF DAYTIME SIGNALS. SOME WEAKENING EVEN CONTINUES INTO THE EVENING, WHEN MANY NETS = END OF 15 WPM TEXT >