Time for another unverified claim. Once again: I will be testing these out once I get any money at all.
This is a youtube page for someone who claims to have (and I very much think did) make her own homemade transistor: http://www.youtube.com/user/jeriellsworth I’ll try to replicate her results when I get the resources to do so.
I’ve found the following site that teaches how radios work: http://www.radio-electronics.com/info/circuits/
This video demonstrates how to make an electric welder. I haven’t actually tested this yet, so I don’t know if it works or not.