Building your own tuned-loop AM antennas

[codefox1]

I hve a loop and it works really great. I'd really like to see a design that could null out signals that are in a plane. IE if I am in a North-South plane, and am getting competing signals from East and West, and I would like to null out the West and only pick up the East, what do I do? I was considering building two loops and somehow phase them, and a long time ago I saw something about adding a whip antenna to do what I am trying to do, but I lost the link. Any ideas?