Thank you teleview for your advice.
I used that very site to make sure which direction to point the antenna:
http://www.kyes.com/antenna/pointing/pointing.html
By beat up I mean a few of the metal elements (wider ones, back of the 'All Band UHF-VHF-FM' antenna) have broken off. As is though, it seems to be more robust than the HD7000R. It has 8 pairs of the wide elements, 10 elements on the 'V-part' and 13 elements at the front.
All the major channels come in fine (310 Magnetic), even with the antenna pointing towards Channel 21 (89 magnetic). I just would like to be able to pull in that Channel, 21, especially.
Would I require a stronger antenna than the HD7000R? Channel 21 is 25 miles away and in the yellow band of the TVFool Report. The antenna is shared by the building, each with a single TV in their households. I have only one TV I will be using.