{"id":27718,"date":"2022-07-18T14:12:42","date_gmt":"2022-07-18T12:12:42","guid":{"rendered":"https:\/\/blog.uchceu.es\/comunicacion-audiovisual\/?p=27718"},"modified":"2022-07-18T14:55:44","modified_gmt":"2022-07-18T12:55:44","slug":"las-cintas-magneticas-i","status":"publish","type":"post","link":"https:\/\/blog.uchceu.es\/comunicacion-audiovisual\/las-cintas-magneticas-i\/","title":{"rendered":"Las cintas magn\u00e9ticas I"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full is-style-rounded\"><img loading=\"lazy\" decoding=\"async\" width=\"612\" height=\"408\" src=\"https:\/\/blog.uchceu.es\/comunicacion-audiovisual\/wp-content\/uploads\/sites\/11\/2022\/07\/gettyimages-1349324810-612x612-1.jpg\" alt=\"\" class=\"wp-image-27719\" srcset=\"https:\/\/blog.uchceu.es\/comunicacion-audiovisual\/wp-content\/uploads\/sites\/11\/2022\/07\/gettyimages-1349324810-612x612-1.jpg 612w, https:\/\/blog.uchceu.es\/comunicacion-audiovisual\/wp-content\/uploads\/sites\/11\/2022\/07\/gettyimages-1349324810-612x612-1-315x210.jpg 315w\" sizes=\"auto, (max-width: 612px) 100vw, 612px\" \/><figcaption>Yellow Colored Audio Cassette Tape Repetition Pattern Against Purple Colored Background.<\/figcaption><\/figure>\n\n\n\n<p>Desde hace varios a\u00f1os los formatos anal\u00f3gicos vuelven a estar de moda. La nostalgia afecta y, aquellos que ten\u00edan vinilos y cassettes en los a\u00f1os 80, se han hecho mayores y quieren recuperar esos formatos f\u00edsicos que la tecnolog\u00eda hab\u00eda dejado atr\u00e1s. En 2021 se han vendido <a href=\"https:\/\/es.statista.com\/estadisticas\/1112668\/ventas-de-lp-vinilos-en-espana\/\" target=\"_blank\" rel=\"noreferrer noopener\">1,6 millones<\/a> de unidades de vinilos en Espa\u00f1a y tambi\u00e9n ha aumentado la <a href=\"https:\/\/www.epe.es\/es\/cultura\/20211029\/fabrica-espanola-cassettes-madrid-2021-12230259\" target=\"_blank\" rel=\"noreferrer noopener\">venta de cassettes<\/a>. Pero, \u00bfc\u00f3mo funcionan las cintas magn\u00e9ticas?<\/p>\n\n\n\n<p>En este post vamos a dar una primera pincelada de c\u00f3mo funcionan las cintas de cassette o cintas magn\u00e9ticas y su tecnolog\u00eda.<\/p>\n\n\n\n<p>El Magnetismo:<\/p>\n\n\n\n<p>El concepto&nbsp;de magnetismo es inseparable de la corriente el\u00e9ctrica,&nbsp;por lo&nbsp;que cualquier conductor&nbsp;a trav\u00e9s del cual fluye la&nbsp;corriente&nbsp;est\u00e1&nbsp;asociado&nbsp;con&nbsp;un campo magn\u00e9tico que&nbsp;aparece&nbsp;en y alrededor del conductor&nbsp;durante&nbsp;el paso de la&nbsp;corriente.<br>Cualquier conductor&nbsp;a trav\u00e9s del cual fluye la corriente est\u00e1 asociado con un campo magn\u00e9tico que aparece en y alrededor del conductor durante el paso de la corriente. Por lo tanto, cualquier conductor el\u00e9ctrico que pase&nbsp;por una corriente el\u00e9ctrica&nbsp;crea en su centro&nbsp;un campo magn\u00e9tico&nbsp;cuya fuerza es&nbsp;proporcional a la&nbsp;fuerza&nbsp;de&nbsp;esta&nbsp;corriente.&nbsp;<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>El cabezal:<\/p>\n\n\n\n<p>El registro magn\u00e9tico&nbsp;se&nbsp;realiza&nbsp;en&nbsp;un cabezal magn\u00e9tico&nbsp;que no es&nbsp;m\u00e1s&nbsp;que&nbsp;una bobina conductora&nbsp;sobre&nbsp;un n\u00facleo que genera un campo magn\u00e9tico proporcional a la corriente aplicada al&nbsp;conductor.&nbsp;En&nbsp;el cabezal&nbsp;se produce&nbsp;una&nbsp;conversi\u00f3n de&nbsp;los cambios&nbsp;de tensi\u00f3n en&nbsp;variaciones&nbsp;de campo&nbsp;magn\u00e9tico.<br>El cabezal magn\u00e9tico&nbsp;adem\u00e1s de&nbsp;tener una capa&nbsp;de cobre&nbsp;envuelta&nbsp;alrededor del metal&nbsp;magn\u00e9tico tiene un&nbsp;entrehierro a trav\u00e9s del cual&nbsp;el flujo debe saltar para&nbsp;completar&nbsp;el circuito.<\/p>\n\n\n\n<p>Durante&nbsp;la grabaci\u00f3n,&nbsp;se genera un&nbsp;campo&nbsp;magn\u00e9tico alrededor del entrehierro,&nbsp;tambi\u00e9n&nbsp;conocido como&nbsp;flujo, lo que&nbsp;hace que las part\u00edculas magn\u00e9ticas se alineen&nbsp;magn\u00e9ticamente con el medio. La magnitud de la holgura&nbsp;es inversamente proporcional al valor de&nbsp;la frecuencia m\u00e1s alta que puede registrar la punta. En otras palabras, cuanto menor sea el entrehierro, mayores ser\u00e1n&nbsp;las frecuencias que se&nbsp;pueden registrar.<\/p>\n\n\n\n<p>La cinta magn\u00e9tica\u00a0consiste en\u00a0una\u00a0delgada tira\u00a0de pl\u00e1stico, que\u00a0sirve\u00a0como base\u00a0cubierta con\u00a0una\u00a0\u00abpel\u00edcula magn\u00e9tica\u00bb\u00a0que\u00a0es\u00a0el\u00a0medio\u00a0de memoria\u00a0en s\u00ed.\u00a0La base de\u00a0pl\u00e1stico es\u00a0poli\u00e9ster o mylar. Debe\u00a0soportar el tir\u00f3n generado por\u00a0las bobinas y\u00a0al mismo tiempo ser\u00a0flexible para\u00a0hacer\u00a0contacto con las\u00a0partes de forma precisa.\u00a0Su espesor\u00a0oscila\u00a0entre 20 y 40 micras (\u03bc)<br><\/p>\n\n\n\n<p>La\u00a0pel\u00edcula magn\u00e9tica\u00a0consiste en\u00a0un conjunto de\u00a0\u00abdipolos magn\u00e9ticos\u00bb,\u00a0es decir,\u00a0peque\u00f1os imanes en forma\u00a0de\u00a0hilo, incrustados\u00a0en\u00a0un agente de uni\u00f3n, que\u00a0permanecen\u00a0adheridos a\u00a0la base\u00a0de pl\u00e1stico,\u00a0aunque\u00a0se mueven libremente en cualquier direcci\u00f3n. Estos\u00a0dipolos magn\u00e9ticos\u00a0suelen denominarse\u00a0\u00f3xidos (pueden ser de hierro,\u00a0cromo, etc.) y su tama\u00f1o es\u00a0de\u00a0unas\u00a00,5 x 0,1\u00a0micras.<br>Cuantos m\u00e1s\u00a0dipolos\u00a0haya\u00a0en\u00a0la cinta mayor es la cantidad de informaci\u00f3n\u00a0efectiva\u00a0que\u00a0puede almacenar\u00a0la\u00a0cinta.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>M\u00e1s adelante habr\u00e1 m\u00e1s informaci\u00f3n de la tecnolog\u00eda de las cintas magn\u00e9ticas.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Desde hace varios a\u00f1os los formatos anal\u00f3gicos vuelven a estar de moda. La nostalgia afecta y, aquellos que ten\u00edan vinilos y cassettes en los a\u00f1os 80, se han hecho mayores y quieren recuperar esos formatos f\u00edsicos que la tecnolog\u00eda hab\u00eda dejado atr\u00e1s. En 2021 se han vendido 1,6 millones de unidades de vinilos en Espa\u00f1a [&hellip;]<\/p>\n","protected":false},"author":90,"featured_media":27721,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[674],"tags":[686,382],"class_list":{"0":"post-27718","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-conceptos","8":"tag-aprender","9":"tag-tecnologia"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Las cintas magn\u00e9ticas I<\/title>\n<meta name=\"description\" content=\"tecnolog\u00eda- las-cintas-magneticas-i\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.uchceu.es\/comunicacion-audiovisual\/las-cintas-magneticas-i\/\" \/>\n<meta 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