You Don't Understand Tesla!!
Tesla didn't have a free power system. He had a HF power broadcast. If you tuned just right, you could receive power. He picked a frequency that resonated with the earth, so he could build up a very high signal strength. Yes, he did run an electric car on it, from more than 50 miles away. But, he had to put the power in before he could take it out. The system also caused arcing in large metal framed buildings. We would have to redesign all buildings of more than five stories to prevent arcing before we really use Tesla's system. That will never happen. Too many skyscrapers, power plants, manufacturing facilities, Aircraft carriers, etc. Also, the frequencies are in commercial use now. A power transmitter would totally drown out any other signal.
How Tesla did it is not a secret. But, it isn't something that we could really use now.
