-
Marconi
Marconi was a Italian inventor. Marconi sent and received the first radio signal in 1895. Was he the first or was it a case of good PR? -
Audion tube
in 1906 Lee De Forest created or borrowed the idea for the audion tube a vacuum tue that amplified signals it -
Radio Sations
in 1920 Frank conrad created the 8xK. the he renamed the 8xK to KDKA. it is still around today broadcasting out of pittsbug, pennsylvania