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A beat frequency oscillator (BFO) is a device that creates an audio signal from Morse code or single-sideband radio signals. Learn how BFOs work, their history, and examples of different types of BFOs.
Morse code is a system of encoding text characters as dots and dashes for telecommunication. Learn about its development by Samuel Morse and Alfred Vail, its international alphabet and variations, and its applications and history.
The Morse potential is a model for the potential energy of a diatomic molecule, accounting for bond breaking and anharmonicity. It is not used in modern spectroscopy, but inspired the MLR potential, which is the most popular function for fitting spectroscopic data.
Learn how to remember Morse code characters using visual, syllabic, or word mnemonics. See examples of mnemonics for letters, numbers, punctuation, and other symbols.
Learn about the crystal radio, a simple and early type of radio receiver that uses a crystal detector to demodulate radio signals. Find out how crystal sets were invented, used, and made obsolete by vacuum tubes and other technologies.
A continuous wave is an electromagnetic wave of constant amplitude and frequency, typically a sine wave, that can be used for radio transmission or modulation. Learn about the origin, development and persistence of continuous wave radio telegraphy, also known as Morse code, and its use in radar and other fields.
Reginald Fessenden was a Canadian-born inventor who pioneered radio technology, including the first transmission of speech and music by radio. He also worked on sonar, amplitude modulation, and submarine detection.
Single-sideband modulation (SSB) is a type of modulation that uses transmitter power and bandwidth more efficiently than amplitude modulation (AM). It eliminates one of the sidebands and the carrier from the transmitted signal, but requires increased device complexity and tuning at the receiver.
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