I've had the RadarBox for several years ... it's the best! I recently changed the layout of my office ... moving the RB and the computer that it uses, but not changing the position of my indoor antenna. As a space-saving measure, I placed the RB on the handy open spot on top of the computer (unfortunately, in close proximity to the power supply). As it was a busy week, I didn't pay too much attention, but a couple of days ago, I noticed my numbers were way down and the polar diagram seemed to indicate that I could only see those aircraft I could see ... looking out my window! I've since moved the RB to another position as far from the computer as is possible and all is well! A lesson learned!