I just tried the watson preamp on my bc250d scanner and it made things worse as far as reception across the band, I just sent it back it was not worth the $ 100 buck they wanted, I know it really depends on your location, the scanner, the antenna the amp, and other things as far as if or how it will work, I think the only thing for you to do is buy one and make sure you have a return policy, try it and if your not happy like I was just return the amp. I know some people who say they work great but then like myself I had no such luck.
steve
