AT more than 90million miles from Earth, it is hard to believe you can watch activity on our huge Sun in such incredible detail.
The January Edition of Digital QST – our annual DIY issue – is now available at http://www.nxtbook.com/nxtbooks/arrl/qst_201601/. In this issue . . . • Build an inexpensive 1 kHz to 1.7 GHz SDR receiver • Add power and PTT indicators to you... Read more