Does anyone have an antenna to get local channels? We recently "cut the cord" and are trying an antenna but we can't get NBC or ABC. The other local channels come in perfect and we've tried different antennas as well as different directions etc. According to the antenna websites we should easily get NBC & ABC since they're the same direction & distance as the other 2 networks. Just wondering if there is some trick we don't know about? Any antenna info you can share would be great!!