[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.abiti.cz\/radio\/#Article","mainEntityOfPage":"https:\/\/www.abiti.cz\/radio\/","headline":"R\u00e1dio","name":"R\u00e1dio","description":"Historie R\u00e1dio nevzniklo najednou jako cel\u00fd vyn\u00e1lez. Jeho v\u00fdvoj zapo\u010dal vyn\u00e1lezem elektrick\u00fdch sou\u010d\u00e1stek p\u0159es ant\u00e9nu a\u017e k samotn\u00e9mu p\u0159ij\u00edma\u010di. U\u017e v roce 1873 James Maxwell p\u0159i\u0161el s principem \u0161\u00ed\u0159en\u00ed elektro magnetick\u00fdch vln. Pot\u00e9 roku 1895 byla sestavena v\u016fbec prvn\u00ed telegrafn\u00ed stanice, jen\u017e nepot\u0159eboval k rozvodu sign\u00e1lu \u017e\u00e1dn\u00e9 dr\u00e1ty. Takto v\u00fdvoj pokra\u010doval a\u017e v roce 1907 prob\u011bhl bezdr\u00e1tov\u00fd hovor na vzd\u00e1lenost […]","datePublished":"2019-11-04","dateModified":"2023-05-19","author":{"@type":"Person","@id":"https:\/\/www.abiti.cz\/author\/#Person","name":"","url":"https:\/\/www.abiti.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/a414941ff2b86a79f1a70a433f21d60df00047fefe742a46b6fded139881a475?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/a414941ff2b86a79f1a70a433f21d60df00047fefe742a46b6fded139881a475?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"abiti.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.abiti.cz\/wp-content\/uploads\/img_a361410_w3202_t1574611175.jpg","url":"https:\/\/www.abiti.cz\/wp-content\/uploads\/img_a361410_w3202_t1574611175.jpg","height":0,"width":0},"url":"https:\/\/www.abiti.cz\/radio\/","about":["Technika"],"wordCount":432,"articleBody":"Historie\tR\u00e1dio nevzniklo najednou jako cel\u00fd vyn\u00e1lez. Jeho v\u00fdvoj zapo\u010dal vyn\u00e1lezem elektrick\u00fdch sou\u010d\u00e1stek p\u0159es ant\u00e9nu a\u017e k samotn\u00e9mu p\u0159ij\u00edma\u010di. U\u017e v roce 1873 James Maxwell p\u0159i\u0161el s principem \u0161\u00ed\u0159en\u00ed elektro magnetick\u00fdch vln. Pot\u00e9 roku 1895 byla sestavena v\u016fbec prvn\u00ed telegrafn\u00ed stanice, jen\u017e nepot\u0159eboval k rozvodu sign\u00e1lu \u017e\u00e1dn\u00e9 dr\u00e1ty. Takto v\u00fdvoj pokra\u010doval a\u017e v roce 1907 prob\u011bhl bezdr\u00e1tov\u00fd hovor na vzd\u00e1lenost neuv\u011b\u0159iteln\u00fdch 75 km. Ji\u017e od 20. let minul\u00e9ho stolet\u00ed jsou dostupn\u00e9 rozhlasov\u00e9 p\u0159ij\u00edma\u010de.\t\t\u0160ikovn\u00ed lid\u00e9 si je vyr\u00e1b\u011bli i doma a mohli tak\u00e9 poslouchat vys\u00edl\u00e1n\u00ed z velk\u00e9 \u010d\u00e1sti Evropy. Do \u010ceska dorazil o n\u011bco pozd\u011bji, ale brzy byl bohu\u017eel kv\u016fli v\u00e1lce cenzurov\u00e1n. I p\u0159esto p\u0159ed rokem 1989 p\u0159en\u00e1\u0161eno vys\u00edl\u00e1n\u00ed ze z\u00e1padu. Ur\u010dit\u011b si n\u011bkte\u0159\u00ed pamatuj\u00ed R\u00e1dio Svoboda nebo BBC. Prvn\u00ed zm\u00edn\u011bn\u00e9 r\u00e1dio bylo \u010dasto ru\u0161eno ru\u0161i\u010dkami. Dokonce v t\u011bchto dob\u00e1ch zabili p\u0159ed rozhlasovou stanic\u00ed 15 lid\u00ed. Ti informovali obyvatele k odporu proti tehdej\u0161\u00edmu re\u017eimu.\tFungov\u00e1n\u00ed\tZvuk se p\u0159en\u00e1\u0161\u00ed pomoc\u00ed dlouh\u00fdch, st\u0159edn\u00edch a kr\u00e1tk\u00fdch vln z ant\u00e9n. Ty se potom \u0161\u00ed\u0159\u00ed na dlouhou vzd\u00e1lenost prostorem. V minulosti byly nejpou\u017e\u00edvan\u011bj\u0161\u00ed st\u0159edn\u00ed vlny, proto\u017ee dos\u00e1hly na opravdu dlouhou vzd\u00e1lenost a mohlo v n\u011bm b\u00fdt v\u00edce za\u0159\u00edzen\u00ed. Pot\u00e9 se za\u010dali pou\u017e\u00edvat nejv\u00edce velmi kr\u00e1tk\u00e9 vlny s 30 a\u017e 300 MHz. Ty u\u017e se \u0161\u00ed\u0159\u00ed jen do n\u011bkolika stovek km, ale m\u016f\u017ee na n\u011bj b\u00fdt napojeno v\u011bt\u0161\u00ed mno\u017estv\u00ed p\u0159\u00edstroj\u016f. Dnes se hodn\u011b roz\u0161i\u0159uje dru\u017eicov\u00e9 vys\u00edl\u00e1n\u00ed.\t\tTo u\u017e je slo\u017eit\u011bj\u0161\u00ed. Pohybuje se od dru\u017eice s ant\u00e9nou, jen\u017e ob\u00edh\u00e1 okolo na\u0161\u00ed planety. Kdy\u017e se vr\u00e1t\u00edme k druh\u00e9mu zm\u00edn\u011bn\u00e9mu vys\u00edl\u00e1n\u00ed vln, tak to m\u00e1 rozm\u00edst\u011bno n\u011bkolik stanic. Ka\u017ed\u00e1 frekvence se naz\u00fdv\u00e1 kmito\u010det. To je b\u011b\u017en\u00fd n\u00e1zev, kter\u00fd pou\u017e\u00edv\u00e1me dodnes p\u0159i lad\u011bn\u00ed r\u00e1dia na obl\u00edbenou rozhlasovou stanici. Tu mus\u00ed p\u0159id\u011blit \u010cesk\u00fd telekomunika\u010dn\u00ed \u00fa\u0159ad, proto\u017ee by mohli o danou frekvenci b\u00fdt spory. Samoz\u0159ejmost\u00ed je, \u017ee na jednom kmito\u010dtu mus\u00ed b\u00fdt jen jedna r\u00e1diov\u00e1 stanice.                                                                                                                                                                                                                                                                                                                                                                                        3.7\/5 - (8 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"R\u00e1dio","item":"https:\/\/www.abiti.cz\/radio\/#breadcrumbitem"}]}]