The winner of the March QST Cover Plaque Award is Carl Luetzelschwab, K9LA for his article “The Sun and the Ionosphere.” Congratulations Carl! The QST Cover Plaque Award — given to the author or authors of the best article in each issue — is determined by a vote of ARRL members on the QST Cover Plaque Poll web page. Cast a ballot for your favorite article in the April issue today.
American Radio Relay League | Ham Radio Association and Resources
As promised in the April 19th edition of The ARRL Letter, this week’s bulletin features a report on recent solar activity and solar cycle progression from Carl Luetzelschwab, K9LA.
Both the solar flux and sunspot numbers reached a short term low on April 8-11, but they are now rising again. For the past week — April 12-18 — the average daily sunspot numbers more than doubled, compared to the p…
American Radio Relay League | Ham Radio Association and Resources