I have a cheap RCA clock radio that picks up FM signals but I can't get FM on an expensive Bose AM/FM Wave radio! Its sitting right next to the cheap one but no FM! What's up with that? I have not purchased an external antenna but the cheapie radio doesn't have one so why would I need one on the more expensive unit? And why does FM come in great on car radios but not on the Bose inside a house?