Conveter box type, zip code, and antenna type would be nice to have, since it's hard to help out without the information on what you're using to pick these up.
However, if your stations are more tham 10 miles out, you're not going to do too well with an indoor antenna. even though
DTV.gov claims it will work with existing analog equipment they miss the one point that with
DTV reception if you're any distance away or have trees or hills, you will pretty much need an amplified (and recommended outdoor) antenna.