On Harvested Frequencies: The Tesla Resonant CollectorTesla did not invent free energy. He discovered that the Earth is already a power source. The planet is a spherical capacitor — ionosphere above, ground below, atmosphere as dielectric — continuously charged by 50 lightning strikes per second. The resonant frequency of this cavity is 7. 83 Hz. Tesla called it the Earth's "electrical heartbeat. " He built Wardenclyffe Tower to tap it. J. P. Morgan defunded it when he realised the power could not be metered. This essay presents the mathematics of Earth-resonant power extraction, a buildable 1 kW prototype with a 280 parts list, the 72-band multi-harvesting extension, and the documented history of why this technology was suppressed — not by conspiracy, but by an investor who understood exactly what Tesla was offering: power that no one could bill for. He gave us the blueprint. We just haven't built it yet. ───On Unbound Frequencies: Electogravity, Tesla's Dynamic Theory, and Resonant Space PropulsionTesla claimed to have developed a dynamic theory of gravity. He never published it. On his 81st birthday he told the New York Herald Tribune he had "worked out a dynamic theory of gravity in all details. " He said his flying machine would operate without wings, without propellers, and without reaction mass. He was not describing anti-gravity. He was describing the direct manipulation of inertia through resonant electromagnetic fields. This essay reconstructs Tesla's theory from his surviving lectures, patents, and interviews. It presents the Biefeld-Brown effect — the force on an asymmetric capacitor that persists in vacuum — and shows how resonance multiplies that force by the square of the quality factor: 4 kg-force becomes 80 tonnes. A 960 prototype is specified. The 72-band propulsion map spans from telluric lift to deep space. The means to leave Earth without rockets was described in 1915. The will to build it is the only missing component. ───On Powering Frequencies: Community Resonant Power and the Post-Grid InfrastructureThe grid is the largest machine ever built and a 19th-century architecture that cannot reach the 770 million people without electricity. Tesla saw a different architecture: one Wardenclyffe-scale transmitter, tuned to the Schumann fundamental, broadcasting power globally through the Earth-ionosphere cavity. Anyone with a receiver coil could draw power. No grid. No wires. No billing. This essay presents the village-scale hybrid system — Schumann collector + solar + battery — that provides base-load power to a community of 500 for 173 per household, with zero fuel cost forever. It specifies the full Wardenclyffe transmitter for continental-scale power delivery. It maps the post-grid economics: what happens when the last kilometre is free. He was not a dreamer. He was an engineer who saw further than anyone else. The patents expired. The physics remained. This is how we finish what he started.
Godfrey et al. (Sun,) studied this question.