Lots of fun with this. You will find it more common as 2008 approachs.

Research the old-fashioned "Crystal Set" and tuning. Use a pencil - not a toil-paper-tube. Split the graphit core from the pencil and replace original graphit in groove.....wrap the pencil with fine copper wire (thinner the better) ....slide the graphit core for tuning....

The real phone-phun begins when you begin to reverse telephone broadcat the conversation onto the local grocery network....or conference room....or classroom....speakers.