Amplifiers will not help here.
You guys have a source of interference in vicinity of your houses (or in them.. for example, your neighbour is grinding a coffee with electric grinder), and of course, the interference reaches your antenna and is amplified together with signal.
The only thing that helps is using highly directional antenna mounted on high mast (away from interference.
If the sourse if interference is further away, and in the same direction from where TV signal is ariving (industral areas for example) there is not much you can do.. except to subscribe to cable TV.
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