Right now i have an astc tv tuner in my computer, which i watch analog tv with on my computer, for source i can select, analog cable, analog antenna, astc cable, astc antenna, composite input, s-video input, can i make one of the DIY antenna's select astc antenna and have over the air hdtv?
Go to Antenna.org and plug in your info. It will tell you what stations are available and the size of the antenna you need. Do note all the home-brew antennas are UHF. When the official changeover takes place there will be some channel shuffling. In the Chicago area CBS and ABC will both be on the VHF band.