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I have a 2170 that I use for my FD. I have a second bank programmed with surround counties FDs. Some counties that I have programmed in I can pick up clearly no matter where I am at. Others I have never heard or very seldom hear unless I'm in the garage working for example. In my house I can't pick them up. Is there something I can do to be able to pick these other depts? It's odd that I can pick up some depts that are 30 miles away yet I can't pick up some that are 15 to 20 miles away.