Roy Lewallen, W7EL, approaches ham radio from an engineering and even scientific point of view.  Roy is the creator of EZNEC, the popular antenna modeling software, and the author of many articles on radio and transceiver design, baluns, antennas, and inductors.  His contributions to the amateur radio hobby and advancing the state of art puts Roy at the head of the class in amateur radio.  W7EL is my QSO Today.