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We tried to develop a so called "Smart antenna" back in the 60's, it involved what was then called WOAB* switching, it didn't go over too well in the 80's with the advent of the Feminist movement, so manual A/B switching was then deployed.
*WOAB, wife operated A/B switch.
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So many straight lines for me to use--most of them I would not touch. But it is sad that the idea did not get out of the proto-type stage.
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If you have two tuners, like one in the TV and one in the FTA box do it that way with two antennas...