I am a geocacher, username = wolf9545, and I just received the Geico travelbug. What I am looking to build to attach to it is a crystal radio. All of the circuits that I found for crystal radios have you connect it to a long wire for the antenna or to a cold water pipe for a ground. Is there any crystal radio circuits that don't need a long antenna? This way it would just be a little box, without batteries, that would be moved around.