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Just completed install of CM 4221HD with Antennacraft Y10713 at 40 foot height using RCA pre-amp, fm trap on, separate input selected and 4 foot distance from each antenna. Was able to eliminate radioshack fm trap and real channel 7 now rock solid. Channels 15, 20, 47 all rock solid with substantially lesser noise margin than WFIE that still pixilates mildly but watchable and solid after dark. Will assume mulitipath? Adjustments to aiming could hurt the lesser NM channels. Would appreciate any suggestions!!!
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