My ChannelMaster 4228 is behind our house on my shed. The shed is a little bit down hill from the house so I think that the house may be blocking some of the signal. I have it on a 5' mast which with the shed it is about 12' off the ground. If I put it on a 10' mast, is it possible that I will get a better signal? Can I just got to Home Depot and get a steel pole and use that? There are virtually no stores in my area that even carry such an item. I can use two 5' poles but I would rather use one 10' for strength. Any thoughts?