Not a surprise for me.
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The amplifier will most likely provide reliable reception.
You can also do the following.
Most Digital Tv's have a Signal Strength Meter and some Digital Tv's have a Signal Quality Meter.
If the Tv has a Signal Quality meter , Signal Quality -> Is Important For Reliable Reception.
With some one watching the Tv for the best reception , raise and lower the antenna and adjust the aim direction of the antenna to find reliable reception.
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To keep water out of outside connections , use coax that has the Compression type connectors on the ends of the coax , not the old crimp type connectors.
To make double sure that water does not get into outside connections , wrap connections and coax with ,
http://www.coaxseal.com.