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  5. Composition of an amateur radio station

Article | REF: TE6500 V1

Amateur Radio

Author: Christian MARTIN

Publication date: November 10, 1999 | Lire en français

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    5. Composition of an amateur radio station

    5.1 Signal sources

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    5.1.1 Signal

    Depending on the transmission mode used, the signal source varies. For Morse telegraphy, the handheld, double-contact or electronic manipulator is used. In telephony, a dynamic or piezoelectric microphone is indispensable. Facsimiles use a photoelectric cell to transform luminosity variations. Television uses an image-analyzer tube, whether slow- or fast-scan. The radio teletype is based on a contact wheel. With the rapid evolution of electronics, some of these signal sources have...

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