Developments at Colorado Springs
a number of sophisticated receivers “for individualizing and isolating the energy transmitted” that would allow a transmitter's signals to be selectively tuned in.
a series of experiments contributing to the understanding of radio propagation and earth resonance, and culminating nearly a decade of work related to the study of synchronized electrical tuned circuits.
Tesla's was convinced that wireless communication to any point
on the globe was possible by the help of devices he had perfected.
This set the stage for Tesla's next grand project:
establishment of an international wireless broadcasting facility
that was to become known as Wardenclyffe.