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"hwh" wrote in message ... "Frank Dresser" schreef in bericht ... Chicago's WIND is a curious case. They went to IBOC a couple of months ago. I'd think a station like WIND would be just about the last station to adopt IBOC, because it's at the low end of the dial - 560 kHz, and uses a directional antenna to broadcast from Northwestern Indiana to Chicago. Getting the necessary 45 kHz bandwidth on a directional antenna at the low end of the dial seems to be an engineering worst case scenerio. I understood this has something to do with the Q-factor of the aerial, is that correct? You actually need a bad aerial for IBOC :-) gr, hwh There are ways of broadbanding an AM tower. One way is to add longwire antennas in parallel to the main tower, stood off by a couple feet or so. I helped install such a system in Portland, Oregon a few years ago. |