I recently raised my Diamond vhf/uhf antenna that is mounted on the eave of my roof about 6 feet higher than it was originally. My receive signal has seem to have gotten worse than were it was at before. I am hearing alot more noise and some stations do not come in at all. I thought "the higher, the better", but apparently thats not the case. Anyone have any ideas why my signal would be worse? Or any suggestions for an improved receive signal ? Thanks.