5. Composition of an amateur radio station
5.1 Signal sources
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 been...
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Composition of an amateur radio station
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Organizations
Telecommunications Regulatory Authority (ART) http://www.art-telecom.fr
Agence nationale des fréquences (ANFR) http://www.anfr.fr
French Telegraph Union (UFT) ...
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