Take a look at this and tell me what you suggest please. Will the 4228 work or will I need 2 of them. One pointing to the N and the other to the S? I have a Radio Shack antenna with the UHF loop sitting on top of my TV and can get 3-1, 6-1, and 7-1. That is my NBC, CBS, and ABC networks. I want to get Fox which is at 18-1 I believe. Will the Zenith Silver Senor work with these distances?