I purchased this antenna to improve my signal for a Sony HD FM radio I recently purchased. In particular, I was having troubles "locking in" a certain radio station here in Minneapolis using the standard antenna that came with my Sony radio. This C. Crane antenna did not help at all. I tried multiple configurations (horizontal, vertical, circles, half circles, etc., etc.). Actually, it provided WORSE reception (based on the signal bars on my radio) compared to the standard/free antenna that came with the radio. Further, its large size makes it challenging to hide. Seems other have had luck with this antenna... but certainly didn't seem to help in my case.