I've tried just plugging it in, and fiddling with the knobs on the antenna, but nothing happens. In the instructions it says to switch the tvs intake from cable to antenna, but I can't figure out how to do it! Do I need a digital converter even though my tv is not digital, but an old school tube? The antenna is set in a window with no obstruction, so I don't think that's the problem. Thanks for your help!