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07/09/2012 | QEX: The July/August 2012 Issue
The July/August issue of QEX -- the ARRL’s “Forum for Communications Experimenters” -- is coming soon, and it is full of theoretical and practical technical articles that you won’t want to miss.
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02/15/2011 | Sunspot 1158 Produces Largest Flare of Solar Cycle 24; CME Headed Toward Earth
Over the past few days, there has been a lot of activity on the Sun. On Sunday, February 13 at 1738 UTC, sunspot 1158 unleashed an M6.6-level blast and on Tuesday, February 15, the same sunspot unleashed an X-class flare, the strongest solar flare in more
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05/27/2010 | New Zealand’s Radio Spectrum Management Cites Ham for Transmitting 3100 W
Last month, New Zealand’s Radio Spectrum Management (RSM) -- that country’s equivalent of the FCC -- charged and fined Alan Potter, ZL3II, of Christchurch, for transmitting outside the terms and conditions of the General User Radio License for Amateur Rad
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10/08/2009 | Scouting Jamboree on the Air (JOTA)
October 17 and 18 will mark the 52nd worldwide Scouting Jamboree on the Air (JOTA). Held the third full weekend in October each year, this is the premier operating event for Amateur Radio and Scouting around the world.
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08/05/2009 | Prepare for the Perseids!
On the night of August 11 and well into the next day, Earth will make its annual passage through the bulk of the debris shed by a comet known as Swift-Tuttle. Much of the debris is composed of dust-sized grains, but when these fragments come plunging into
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07/31/2009 | The K7RA Solar Update
No sunspot activity this week, and if no sunspot appears today, July 31, the average sunspot number for July will be 5.1; this is down from June's average of 6.6. The monthly average of the daily sunspot number, January-July 2009, is 2.8, 2.5, 0.8, 1.3, 4
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07/24/2009 | The K7RA Solar Update
No new sunspots yet, but a big surprise this week with aurora and a geomagnetic storm: Sunspot activity peaked around 0300-0900 UTC on Wednesday July 22, with K index as high as 6. The planetary A index for the day was 24. You can see the K index variatio
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04/03/2009 | The K7RA Solar Update
Our Sun is in the news again, unfortunately not due to any hoped-for activity, but for the eerie quiet instead. The Sun is surprisingly calm by several measurements -- including the large number of spotless days -- with an average 10.7 cm solar flux and l
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