I have several years ago. Believe its a liberal conspiracy theory to think he invented "free" energy.
Its amazing how easily people and their money are soon parted.....thanks to Global Warming, Species Extinction, Frankenfood, Virus-Prolifering Moonbats.
Tesla did some cool high-voltage experiments. Free Energy? Perhaps if you can trap and store lightning.
He never said he could make free energy. But with the idea of harmonic resonance, after the initial "start-up" in would build up and grow.