My reception is worse after installing the pre-amplifier.

Insure that there is not a splitter in the cable line between the preamplifier and the preamplifier power supply.

Insure you have properly installed the preamplifier per the instructions.

Try replacing the cable between the preamplifier and the power supply.

Verify that a preamplifier is needed by visiting www. antennaweb. org.

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