Amateur radio was the key driver that led Carl Luetzelschwab, K9LA, to a MSEE in Electrical Engineering and then a career as an RF design engineer with both Motorola and later Magnavox. When the hobby bites us at an early age, doors open to a bright and successful future. Carl has written hundreds of articles on the propagation of radio signals over the years.  He shares this knowledge with Eric, 4Z1UG, in his QSO Today. #QSOTODAY