Your problem is not lack of signal. It is also not your HBU33 antenna. Perhaps you should make a direct connection between the antenna balun to a single TV set to test your signal strength on each channel. Then put your distribution amplifier inline and repeat the test with the single TV. This test will determine whether or not your distribution amplifier is working correctly. Make sure that the amplifier is powered. You may also place terminators on the unused ports during the test.
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