I just bought the largest UHF only antenna from Radio shack. It's the U-120 R and it's 102". the antennaweb.org suggested a medium directional with amplifier. The antenna I bought isn't amplified so I bought radio shacks high gain antenna-mounted signal amplifier. Is this the best antenna amplifier combo I can get? I'm using the antenna for DTV stations and can only receive them at night and then some nights are better than others.