Uh, The spark gap transmitters used by Hertz and Marconi were digital (Morse code is a digital protocol) and for the most part the only tuning was done by the antenna. Latter there was some sort of tank circuit or resonant tuning added, but I don't think so in the beginning.
Hertz and Marconi beat them to it (Score:3)
Re: (Score:2)
Sure, but now try to make that into a nice clean modulated signal compliant with FCC regulations.