Good evening NoDTV,
I had a similar problem at our house! I originally purchased a signal booster and added it to our regular antenna....and unfortunately had the same outcome as you. Gained a few channels and lost a couple of others. Check out this thread when you get a chance:
http://www.dtvusaforum.com/dtv-recep...-channels.html. It describes how we fixed our
dtv reception problem.
Are you 30 miles or farther out from a city/broadcast tower?
I always like to recommend (In matters of pursuing a better reception of
DTV signals) purchasing a few different antenna's from a store with a good return policy to test out.
Good luck, I think trial and error is going to be your best bet for now, in the mean time, if anybody else has any other recommendations, don't be afraid to post.
Let me know about the distance away from the broadcast tower/city if you can approximate.