The fact that you are receiving only KOTI leads me to believe that you have a VHF-only antenna. With a decent VHF-UHF antenna, you ought to receive KOTI-DT (Real 13), KFTS (Real 33), and KDKF (Real 29) without an amplifier. Your signals from these three broadcast towers are quite strong. Point your antenna 210° magnetic. Also be sure that your cable has continuity between the antenna and your converter box. Also make sure that your 75 ohm to 300 ohm matching transformer is operational.
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