I did this once with a rectifier, long antenna and an earpiece. In those days (50 years ago), strong AM radio stations were common, and I did indeed listen to s

I did this once with a rectifier, long antenna and an earpiece. In those days (50 years ago), strong AM radio stations were common, and I did indeed listen to several stations at the same time. If nothing else, it builds an appreciation for all the other junk in an AM receiver.