Wog, I just had an idea.. . I'm picturing your basement window and I'm guessing it's the same dimensions as an HDTV.. very wide but not too high. Not tall enough for a 4-bay antenna unless you put it in sideways.. . So try this; make two 2-bay antennas and tie them together like an 8-bay (two 4-bays). Make sure the reflector is not farther than 4 inches away from the elements. Make the "bows" 8-1/2 to 9 inches. Hope this post makes sense.. .