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| Line 70: |
Line 70: |
| | at:1900 text:"Popov supervises the construction of a radio station on Hogland island providing a two-way communication by wireless telegraphy between Russian navy base and crew of the battleship [[General-Admiral Apraksin]]. | | at:1900 text:"Popov supervises the construction of a radio station on Hogland island providing a two-way communication by wireless telegraphy between Russian navy base and crew of the battleship [[General-Admiral Apraksin]]. |
| | at:1900 text:"Tesla begins construction of the [[Wardenclyffe Tower]] facility for trans-Atlantic wireless telephony." | | at:1900 text:"Tesla begins construction of the [[Wardenclyffe Tower]] facility for trans-Atlantic wireless telephony." |
| − | at:1901 text:"Marconi receives the first trans-Atlantic radio signal on 12 December. The message received was three dots, the Morse code for the letter S."
| + | |
| − | at:1902 text:"Tesla gives interference testimony in the matter of his patent application for "Systems of Signaling" and that of [[Reginald Fessenden]] for "Improvement in the Transmission and Receipt of Signals," subsequently determined in Tesla's favor."
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| − | at:1904 text:"Bose receives patent for the use of a semi-conducting crystal as a detector of radio waves"
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| − | at:1904 text:"[[John Ambrose Fleming]] develops the "oscillation valve" or "kenotron," later known as the vacuum-tube diode. "
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| − | at:1904 text:"Tesla advertises his services."
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| − | at:1906 text:"[[Lee De Forest]] invents the [[Audion tube|Audion]], now known as the vacuum-tube [[triode]]."
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| − | at:1906 text:"Fessenden transmits the first audio radio broadcast on AM from Brant Rock, [[Massachusetts]]. Ships at sea heard a broadcast that included Fessenden playing the song Silent Night on the violin and reading a passage from the [[Bible]]. "
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| − | at:1909 text:"Marconi is a co-awardee of the Nobel Prize in physics"
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| − | at:1910 text:"Lee de Forest airs radio programs from [[New York]]'s [[Metropolitan Opera|Metropolitan Opera House]]. "
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| − | at:1922 text:"The BBC begins broadcasting from London, on November 14."
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| − | at:1928 text:"[[Julius Edgar Lilienfeld]] patents the transistor principle in Germany"
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| − | at:1933 text:"[[Edwin Howard Armstrong|Edwin Armstrong]] patents FM ([[frequency modulation]])"
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| − | at:1947 text:"William Shockley, John Bardeen and Walter Brattain succeeds in building the first practical point-contact [[transistor]] at [[Bell Labs]] on 22 December. This work followed from their war-time research into radar."
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| − | at:1956 text:"Shockley, Bardeen and Brattain receive the [[Nobel Prize]] in Physics for the invention of the transistor""
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| | </timeline> | | </timeline> |
