I made mine from this [ame]http://www.youtube.com/watch?v=skKmwT0EccE[/ame] and it needs no electric power to run. I love free power.
There are several books on how to make radios that don't require batteries, And even Prisoners Of War during WW I & WW II were able to put together simple receivers... But, With the advent of solar and crank powered radios now on the market, I would consider one of them if it were for an emergency situation. If it's just a project, look up a book from the run of the century called 'The Boy Electrician' by Alfred P. Morgan. (ISBN 1-55918-164-8) Original copyright was 1913 and the last revision was 1940 so all the equipment they show you how to build is very simple by todays standards. You will learn a lot of the basics from that book. ------------------------- Single 'Cats Whisker' radios or 'Oatmeal Can' radios were popular when kids learned something besides how to watch MTV... ------------------------- A Google search for 'Homemade Radio' returned more than 6 million hits! That's crazy! Looks like we aren't the only geeks that play with this stuff! ------------------------ I just found a web site I'm going to waste HOURS on! http://sci-toys.com/scitoys/scitoys/radio/homemade_radio.html Here is another one! http://schmarder.com/radios/crystal/index.htm ------------------------
