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Thanks, AD Tech.
I don't believe there is a pre-amp on the antenna.
The installer put the CM 0747 on the line because we were getting weak reception when he first put it up, and it immediately made a huge difference. He said it was needed because once the cable run exceeds 50 feet, the signal needs a boost.
What I don't understand is why it worked perfectly for a year, and when I put a new one on it will work for either a couple of weeks, or a couple of days.
I don't know much about antennas, but that seems curious to me.
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