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Message: <blockquote data-quote="RimaNTSS" data-source="post: 889074" data-attributes="member: 312276">I was thinking about change-of-the-LNBs issue for PFA. I think it is possible but not so easy. First of all antenna should be big enough (I think 180cm minimum), secondly, it should be on the polar-mount (for Az-El mount task will be much more difficult). Device not necessary should be revolving, could also be linear. So I made small drawing for linear one. Total of the main frame (blue) 80cm. Red frame is movable one  holding all LNBs. And green is actuator (do not know what type it should be, but hope they exist and maybe even in smaller sizes). So, what do you think? Critics are welcome.</blockquote>