. . . . . "Magick\u00E9 oko, spr\u00E1vn\u011Bji elektronov\u00FD ukazatel lad\u011Bn\u00ED, je druh elektronky, kter\u00FD se pou\u017E\u00EDval k indikaci velikosti sign\u00E1lu v elektronick\u00FDch p\u0159\u00EDstroj\u00EDch p\u0159ibli\u017En\u011B od poloviny 30. let do konce 60. let. 20. stolet\u00ED. Nahrazovalo tak v t\u00E9 dob\u011B dra\u017E\u0161\u00ED mechanick\u00E9 ru\u010Di\u010Dkov\u00E9 p\u0159\u00EDstroje, obvykle designov\u011B pojat\u00FD miliamp\u00E9rmetr, zapojen\u00FD v anodov\u00E9m obvodu automatick\u00FDm vyrovn\u00E1v\u00E1n\u00EDm citlivosti \u0159\u00EDzen\u00E9 elektronky (typicky posledn\u00ED mezifrekven\u010Dn\u00ED stupe\u0148 superhetu). Magick\u00E9 oko EM11 v p\u0159ij\u00EDma\u010Di Tesla 623A M\u00E1j"@cs . . . "Indicatorbuis"@nl . . . . . "L'expression \u0153il magique d\u00E9signe commun\u00E9ment, jusqu'\u00E0 la premi\u00E8re moiti\u00E9 des ann\u00E9es 1950, l'indicateur visuel d'accord et de qualit\u00E9 de r\u00E9ception pr\u00E9sent en fa\u00E7ade sur la plupart des r\u00E9cepteurs de radio \u00E0 tubes \u00E9lectroniques (ou poste T.S.F). Ce type de tube a \u00E9t\u00E9 tr\u00E8s utilis\u00E9 en radio, depuis les premiers mod\u00E8les commercialis\u00E9s en 1934 jusqu'au milieu des ann\u00E9es 1960 sur les derniers r\u00E9cepteurs \u00E0 tubes, avant que tous les r\u00E9cepteurs radio ne basculent d\u00E9finitivement vers les transistors."@fr . "L'occhio magico (magic eye in inglese) \u00E8 una speciale valvola termoionica che tramite la proiezione di un settore luminoso sulla superficie laterale del tubo, oppure sulla cupola, permette la rappresentazione visiva dell'intensit\u00E0 di un segnale elettrico. Tipiche erano per esempio le 6E5, le EM80, le EM84, e altre ancora. In molti radioricevitori a valvole gli occhi magici erano impiegati per mostrare l'esattezza nonch\u00E9 l'accuratezza della sintonia. Nei magnetofoni a nastro erano invece usati come indicatori del livello di registrazione."@it . . . . . . . . "Magisches Auge (Radio)"@de . . "\uB9E4\uC9C1\uC544\uC774"@ko . . "12219"^^ . . "S'anomena ull m\u00E0gic una v\u00E0lvula termoi\u00F2nica, desenvolupada per RCA, que inclou una petita pantalla de raigs cat\u00F2dics. Es va utilitzar principalment com a indicador de sintonia en les r\u00E0dios de gamma alta. Sol incloure un tr\u00EDode que amplifica el senyal d'entrada abans d'aplicar-lo a un el\u00E8ctrode de deflexi\u00F3 de la part de raigs cat\u00F2dics. L'efecte que es produeix \u00E9s que la zona lluminosa creix o decreix depenent del nivell del senyal, fet que ajudaria l'usuari a sintonitzar l'aparell."@ca . . . . "y"@en . . . . . . . . . . . "( \uD154\uB808\uBE44\uC804 \uD504\uB85C\uADF8\uB7A8\uC5D0 \uB300\uD574\uC11C\uB294 \uB9E4\uC9C1\uC544\uC774 (\uD154\uB808\uBE44\uC804 \uD504\uB85C\uADF8\uB7A8) \uBB38\uC11C\uB97C \uCC38\uACE0\uD558\uC2ED\uC2DC\uC624.) \uB9E4\uC9C1\uC544\uC774(magic eye)\uB294 \uC9C4\uACF5\uAD00\uC758 \uC77C\uC885\uC73C\uB85C \uB77C\uB514\uC624 \uC218\uC2E0\uAE30\uB098 \uC624\uB514\uC624 \uAE30\uAE30\uC5D0 \uC0AC\uC6A9\uB418\uB294 \uB77C\uB514\uC624\uC758 \uC218\uC2E0 \uAC15\uB3C4\uC640 \uB3D9\uC870 \uC0C1\uD0DC \uCD9C\uB825 \uC2E0\uD638\uC758 \uAC15\uB3C4 \uB4F1\uC744 \uD615\uAD11 \uD45C\uC2DC\uD558\uC600\uB2E4."@ko . "A magic eye tube or tuning indicator, in technical literature called an electron-ray indicator tube, is a vacuum tube which gives a visual indication of the amplitude of an electronic signal, such as an audio output, radio-frequency signal strength, or other functions. The magic eye (also called a cat's eye, or tuning eye in North America) is a specific type of such a tube with a circular display similar to the EM34 illustrated. Its first broad application was as a tuning indicator in radio receivers, to give an indication of the relative strength of the received radio signal, to show when a radio station was properly tuned in."@en . . . . "1117700834"^^ . . "( \uD154\uB808\uBE44\uC804 \uD504\uB85C\uADF8\uB7A8\uC5D0 \uB300\uD574\uC11C\uB294 \uB9E4\uC9C1\uC544\uC774 (\uD154\uB808\uBE44\uC804 \uD504\uB85C\uADF8\uB7A8) \uBB38\uC11C\uB97C \uCC38\uACE0\uD558\uC2ED\uC2DC\uC624.) \uB9E4\uC9C1\uC544\uC774(magic eye)\uB294 \uC9C4\uACF5\uAD00\uC758 \uC77C\uC885\uC73C\uB85C \uB77C\uB514\uC624 \uC218\uC2E0\uAE30\uB098 \uC624\uB514\uC624 \uAE30\uAE30\uC5D0 \uC0AC\uC6A9\uB418\uB294 \uB77C\uB514\uC624\uC758 \uC218\uC2E0 \uAC15\uB3C4\uC640 \uB3D9\uC870 \uC0C1\uD0DC \uCD9C\uB825 \uC2E0\uD638\uC758 \uAC15\uB3C4 \uB4F1\uC744 \uD615\uAD11 \uD45C\uC2DC\uD558\uC600\uB2E4."@ko . . . "Magisches Auge ist die umgangssprachliche Bezeichnung f\u00FCr eine Abstimmanzeiger\u00F6hre, eine spezielle Elektronenr\u00F6hre, welche die St\u00E4rke eines Signals nach dem Prinzip der Bargraph-Anzeige als Leuchtbalken oder -sektor anzeigt und oft in \u00E4lteren Radioger\u00E4ten, aber auch in Fernsehger\u00E4ten eingebaut ist. Auch Tonbandger\u00E4te, Audioverst\u00E4rker und andere Ger\u00E4te besa\u00DFen ein Magisches Auge als Pegelanzeige."@de . . . "L'expression \u0153il magique d\u00E9signe commun\u00E9ment, jusqu'\u00E0 la premi\u00E8re moiti\u00E9 des ann\u00E9es 1950, l'indicateur visuel d'accord et de qualit\u00E9 de r\u00E9ception pr\u00E9sent en fa\u00E7ade sur la plupart des r\u00E9cepteurs de radio \u00E0 tubes \u00E9lectroniques (ou poste T.S.F). Il s'agit d'un tube \u00E9lectronique dot\u00E9 d'une partie luminescente \u00E0 sa calotte, pour les mod\u00E8les anciens, ou sur la longueur du tube, pour les plus modernes. Dans les deux cas, l'\u0153il magique indique le niveau de r\u00E9ception par \u00E9panouissement des secteurs lumineux : ainsi, plus la surface d'illumination d'un \u0153il magique est grande, meilleure est la qualit\u00E9 de la r\u00E9ception. Ce type de tube a \u00E9t\u00E9 tr\u00E8s utilis\u00E9 en radio, depuis les premiers mod\u00E8les commercialis\u00E9s en 1934 jusqu'au milieu des ann\u00E9es 1960 sur les derniers r\u00E9cepteurs \u00E0 tubes, avant que tous les r\u00E9cepteurs radio ne basculent d\u00E9finitivement vers les transistors. Ils ont \u00E9galement \u00E9t\u00E9 utilis\u00E9s sur de nombreux appareils autres que radiophoniques, comme par exemple sur certains magn\u00E9tophones \u00E0 bande magn\u00E9tique, o\u00F9 ils servaient \u00E0 \u00E9valuer le niveau sonore d'une prise de son avec un microphone, afin d'\u00E9viter un enregistrement sonore trop faible ou trop satur\u00E9. Ou encore sur certains appareils de mesure, o\u00F9 il n'\u00E9tait pas utile d'avoir une indication pr\u00E9cise par galvanom\u00E8tre, mais simplement d'avoir la possibilit\u00E9 de voir visuellement un maximum d'amplitude, ce qui est le cas des dipm\u00E8tres, des bermascopes et analyseurs de signaux divers. De nos jours, ce type de tube n'est pratiquement plus utilis\u00E9, et son usage se limite \u00E0 celui de vu-m\u00E8tre analogique sur certains amplificateurs de salon audiophiles. Quelques mod\u00E8les r\u00E9cents sont toutefois refabriqu\u00E9s pour satisfaire cette demande particuli\u00E8re, mais il existe encore de nombreux stocks des mod\u00E8les les plus courants d'\u0153il magiques, et il reste encore relativement ais\u00E9 de trouver certaines r\u00E9f\u00E9rences sur internet ou dans les bourses sp\u00E9cialis\u00E9es."@fr . . "Elektronowy wska\u017Anik strojenia (magiczne oko) \u2013 pr\u00F3\u017Cniowa lampa elektronowa, kt\u00F3rej zadaniem jest sygnalizowanie poziomu napi\u0119cia. Stosowana by\u0142a jako wska\u017Anik wysterowania w radioodbiornikach i wzmacniaczach oraz wska\u017Anik r\u00F3wnowagi w mostkach pomiarowych."@pl . "S'anomena ull m\u00E0gic una v\u00E0lvula termoi\u00F2nica, desenvolupada per RCA, que inclou una petita pantalla de raigs cat\u00F2dics. Es va utilitzar principalment com a indicador de sintonia en les r\u00E0dios de gamma alta. Sol incloure un tr\u00EDode que amplifica el senyal d'entrada abans d'aplicar-lo a un el\u00E8ctrode de deflexi\u00F3 de la part de raigs cat\u00F2dics. L'efecte que es produeix \u00E9s que la zona lluminosa creix o decreix depenent del nivell del senyal, fet que ajudaria l'usuari a sintonitzar l'aparell."@ca . . . . "\u30DE\u30B8\u30C3\u30AF\u30A2\u30A4 (magic eye tube) \u306F\u3001\u771F\u7A7A\u7BA1\u306E\u4E00\u7A2E\u3002\u7A2E\u5225\u3068\u3057\u3066\u306F\u8868\u793A\u7BA1\u306B\u5206\u985E\u3055\u308C\u308B\u3002\u304B\u3064\u3066\u306E\u30E9\u30B8\u30AA\u53D7\u4FE1\u6A5F\u3084\u30AA\u30FC\u30C7\u30A3\u30AA\u6A5F\u5668\u306B\u4F7F\u7528\u3055\u308C\u3001\u30E9\u30B8\u30AA\u306E\u53D7\u4FE1\u5F37\u5EA6\u3084\u540C\u8ABF\u72B6\u614B\u3001\u51FA\u529B\u4FE1\u53F7\u306E\u5F37\u5EA6\u306A\u3069\u3092\u86CD\u5149\u8868\u793A\u3059\u308B\u3002\u65E5\u672C\u8A9E\u3067\u306F\u540C\u8ABF\u6307\u793A\u7BA1\uFF08\u3069\u3046\u3061\u3087\u3046\u3057\u3058\u304B\u3093\uFF09\u3068\u547C\u3070\u308C\u308B\u3002 \u8868\u793A\u90E8\u306E\u5F62\u306F\u8907\u6570\u3042\u308B\u304C\u3001\u3082\u3063\u3068\u3082\u3088\u304F\u77E5\u3089\u308C\u3066\u3044\u308B\u30BF\u30A4\u30D7\u306F\u3001\u5186\u5F62\u90E8\u306B\u6247\u304C\u91CD\u306A\u308B\u3088\u3046\u306B\u8868\u793A\u3055\u308C\u308B\u30BF\u30A4\u30D7\u3067\u3042\u308B\uFF08\u53F3\u8A18\u5199\u771F\u53C2\u7167\uFF09\u3002 1937\u5E74\u306B\u30A2\u30EC\u30F3\u30FB\u30C7\u30E5\u30E2\u30F3\u535A\u58EB\u306B\u3088\u3063\u3066\u767A\u660E\u3055\u308C\u3066\u4EE5\u964D\u3001\u3059\u3050\u306B\u30E9\u30B8\u30AA\u53D7\u4FE1\u6A5F\u306E\u524D\u9762\u306B\u88C5\u7740\u3055\u308C\u306F\u3058\u3081\u3001\u305D\u308C\u307E\u3067\u4E00\u822C\u7684\u3060\u3063\u305F\u300CTuneon\u300D\u3068\u547C\u3070\u308C\u308B\u30CD\u30AA\u30F3\u7BA1\u3092\u6B21\u3005\u3068\u99C6\u9010\u3057\u3066\u3044\u3063\u305F\u3002 \u65E5\u672C\u306B\u304A\u3044\u3066\u306F\u30011950\u5E74\u4EE3\u521D\u982D\uFF08\u662D\u548C27 - 28\u5E74\u9803\uFF09\u306B\u767A\u58F2\u3055\u308C\u305F\u30E9\u30B8\u30AA\u304B\u3089\u5F90\u3005\u306B\u642D\u8F09\u3055\u308C\u3066\u3044\u3063\u305F\u3002"@ja . . . . "Magick\u00E9 oko, spr\u00E1vn\u011Bji elektronov\u00FD ukazatel lad\u011Bn\u00ED, je druh elektronky, kter\u00FD se pou\u017E\u00EDval k indikaci velikosti sign\u00E1lu v elektronick\u00FDch p\u0159\u00EDstroj\u00EDch p\u0159ibli\u017En\u011B od poloviny 30. let do konce 60. let. 20. stolet\u00ED. Nahrazovalo tak v t\u00E9 dob\u011B dra\u017E\u0161\u00ED mechanick\u00E9 ru\u010Di\u010Dkov\u00E9 p\u0159\u00EDstroje, obvykle designov\u011B pojat\u00FD miliamp\u00E9rmetr, zapojen\u00FD v anodov\u00E9m obvodu automatick\u00FDm vyrovn\u00E1v\u00E1n\u00EDm citlivosti \u0159\u00EDzen\u00E9 elektronky (typicky posledn\u00ED mezifrekven\u010Dn\u00ED stupe\u0148 superhetu). Magick\u00E9 oko EM11 v p\u0159ij\u00EDma\u010Di Tesla 623A M\u00E1j V principu se jedn\u00E1 o triodu, na jej\u00ED\u017E m\u0159\u00ED\u017Eku je p\u0159iv\u00E1d\u011Bno z\u00E1porn\u00E9 \u0159\u00EDdic\u00ED nap\u011Bt\u00ED. Tato trioda m\u00E1 v anodov\u00E9m obvodu zapojen odpor hodnoty \u0159\u00E1dov\u011B jednotek megaohm\u016F. Nap\u011Bt\u00ED anody se tak v \u0161irok\u00E9m rozsahu m\u011Bn\u00ED v z\u00E1vislosti na \u0159\u00EDdic\u00EDm nap\u011Bt\u00ED m\u0159\u00ED\u017Eky. Sou\u010D\u00E1st\u00ED prv\u00FDch konstrukc\u00ED magick\u00E9ho oka je \u010Deln\u011B um\u00EDst\u011Bn\u00E9 miskovit\u00E9 st\u00EDn\u00EDtko, kter\u00E9 m\u00E1 na vnit\u0159n\u00ED stran\u011B nanesen zelen\u011B sv\u00EDt\u00EDc\u00ED luminofor. \u017Dhaven\u00E1 katoda triodov\u00E9ho syst\u00E9mu je prota\u017Eena a\u017E dovnit\u0159 misky st\u00EDn\u00EDtka, kter\u00E9 je p\u0159ipojeno na pln\u00E9 anodov\u00E9 nap\u011Bt\u00ED cca 250V. Elektrony, vyl\u00E9taj\u00EDc\u00ED z katody a dopadaj\u00EDc\u00ED na luminofor st\u00EDn\u00EDtka, jej rozsv\u011Bcuj\u00ED. V cest\u011B elektron\u016Fm v\u0161ak stoj\u00ED vychylovac\u00ED elektroda (\u010Dasto i pouh\u00FD tenk\u00FD kol\u00EDk), spojen\u00E1 s anodou \u0159\u00EDdic\u00ED triody. Pokud je na \u0159\u00EDdic\u00ED m\u0159\u00ED\u017Ece triody mal\u00E9 \u010Di \u017E\u00E1dn\u00E9 ovl\u00E1dac\u00ED nap\u011Bt\u00ED, je trioda pln\u011B otev\u0159ena a sp\u00E1d nap\u011Bt\u00ED na jej\u00EDm anodov\u00E9m (zat\u011B\u017Eovac\u00EDm) odporu je vysok\u00FD. Anoda, a tud\u00ED\u017E i elektroda stoj\u00EDc\u00ED v cest\u011B elektron\u016F uvnit\u0159 st\u00EDn\u00EDtka m\u00E1 v\u016F\u010Di n\u011Bmu mnohem ni\u017E\u0161\u00ED potenci\u00E1l, \u010D\u00EDm\u017E od sebe odkl\u00E1n\u00ED elektrony. Na rozz\u00E1\u0159en\u00E9m st\u00EDn\u00EDtku magick\u00E9ho oka se tak objev\u00ED temn\u00E1 v\u00FDse\u010D. Se zvy\u0161uj\u00EDc\u00EDm se z\u00E1porn\u00FDm nap\u011Bt\u00EDm na \u0159\u00EDdic\u00ED m\u0159\u00ED\u017Ece triody se tato uzav\u00EDr\u00E1, sp\u00E1d nap\u011Bt\u00ED na anodov\u00E9m zat\u011B\u017Eovac\u00EDm odporu se sni\u017Euje a nap\u011Bt\u00ED na anod\u011B triody stoup\u00E1. Stejn\u011B tak stoup\u00E1 nap\u011Bt\u00ED vychylovac\u00ED elektrody uvnit\u0159 st\u00EDn\u00EDtka, ta p\u0159est\u00E1v\u00E1 odpuzovat prol\u00E9t\u00E1vaj\u00EDc\u00ED elektrony a temn\u00E1 v\u00FDse\u010D na st\u00EDn\u00EDtku se uzav\u00EDr\u00E1. Prv\u00E9 americk\u00E9 typy magick\u00FDch ok m\u011Bly uvnit\u0159 st\u00EDn\u00EDtka pouze jednu odkl\u00E1n\u011Bc\u00ED elektrodu a obraz na st\u00EDn\u00EDtku oka p\u0159ipom\u00EDnal nakrojen\u00FD dort. Evropsk\u00E1 magick\u00E1 oka m\u00EDvala tvar obrazce na st\u00EDn\u00EDtku v podob\u011B k\u0159\u00ED\u017Ee. Dva \u00FAzk\u00E9 st\u00EDny tvo\u0159ily dr\u00E1tov\u00E9 nosn\u00EDky st\u0159edn\u00EDho klobou\u010Dku, kter\u00FD odsti\u0148oval ne\u017E\u00E1douc\u00ED rudou z\u00E1\u0159i \u017Ehnouc\u00ED katody. Tyto tenk\u00E9 st\u00EDny se nem\u011Bnily. Prota\u017Een\u00E9 dr\u00E1tov\u00E9 nosn\u00EDky anody \u0159\u00EDdic\u00ED triody pak byly on\u011Bmi elektrodami, vytv\u00E1\u0159ej\u00EDc\u00ED dva protilehl\u00E9 st\u00EDny; v\u00FDse\u010De, zu\u017Euj\u00EDc\u00ED a roz\u0161i\u0159uj\u00EDc\u00ED se podle \u0159\u00EDdic\u00EDho nap\u011Bt\u00ED m\u0159\u00ED\u017Eky triody. Postupn\u00FDm v\u00FDvojem do\u0161li konstrukt\u00E9\u0159i elektronek k magick\u00E9mu oku s \"dvoj\u00ED citlivost\u00ED\". Byl to zp\u016Fsob jak zv\u00FD\u0161it citlivost magick\u00E9ho oka pro mal\u00E1 \u0159\u00EDdic\u00ED nap\u011Bt\u00ED a z\u00E1rove\u0148 umo\u017Enit indikaci i p\u0159i vysok\u00FDch \u0159\u00EDdic\u00EDch nap\u011Bt\u00EDch. Dos\u00E1hli toho rozd\u011Blen\u00EDm anody \u0159\u00EDdic\u00ED triody na dv\u011B r\u016Fzn\u011B velik\u00E9 samostatn\u00E9 \u010D\u00E1sti. V\u011Bt\u0161\u00ED \u010D\u00E1st anody tvo\u0159ila syst\u00E9m s vy\u0161\u0161\u00ED citlivost\u00ED, men\u0161\u00ED \u010D\u00E1st anody pak m\u00E9n\u011B citliv\u00FD syst\u00E9m. Ka\u017Ed\u00FD z t\u011Bchto syst\u00E9m\u016F m\u00E1 svou \u0159\u00EDdic\u00ED elektrodu (ty\u010Dinku) uvnit\u0159 st\u00EDn\u00EDtka a ka\u017Ed\u00E1 nez\u00E1visle vytv\u00E1\u0159\u00ED sv\u016Fj st\u00EDn. Jak obrazec na st\u00EDn\u00EDtku takto konstruovan\u00E9ho magick\u00E9ho oka vypad\u00E1, je vid\u011Bt na \u017Eiv\u00E9m obr\u00E1zku v p\u0159ipojen\u00E9 galerii; je to typ EM11. Je dob\u0159e vid\u011Bt, jak horn\u00ED v\u00FDse\u010D oka je ji\u017E pln\u011B uzav\u0159ena, zat\u00EDmco doln\u00ED v\u00FDse\u010D (syst\u00E9m s ni\u017E\u0161\u00ED citlivost\u00ED) se teprve uzav\u00EDr\u00E1."@cs . . . . . "Se llama ojo m\u00E1gico u ojo el\u00E9ctrico a una v\u00E1lvula termoi\u00F3nica desarrollada por RCA (Radio Corporation of America), que incluye una peque\u00F1a pantalla de rayos cat\u00F3dicos. Se utiliz\u00F3 principalmente como indicador de sinton\u00EDa en las radios de gama alta. Sol\u00EDa ser un pentodo (bulbo de cinco electrodos) y sol\u00EDa incluir un triodo que amplifica la se\u00F1al de entrada antes de aplicarla a un electrodo de deflexi\u00F3n de la parte de rayos cat\u00F3dicos. El efecto que se produce es que una zona luminosa crece o decrece seg\u00FAn el nivel de se\u00F1al. Esto hac\u00EDa que el usuario pudiese sintonizar el aparato perfectamente. En la actualidad existen t\u00E9cnicos de radio que quieren incluir estas antiguas v\u00E1lvulas a los aparatos modernos de radio y de reproducci\u00F3n musical, como un elemento atractivo y al mismo tiempo funcional. B\u00E1sicamente, existen dos tipos: \n* Con la pantalla circular. El tubo es cil\u00EDndrico, con la pantalla en la parte de arriba, formada por un \u00E1nodo en forma de cono invertido recubierto de f\u00F3sforo. El haz de electrones sale del centro, creando una iluminaci\u00F3n en forma de dos abanicos sim\u00E9tricos que se abren y cierran. La forma circular de la pantalla, con el c\u00EDrculo central oscuro recuerda la pupila de un ojo, de ah\u00ED el nombre del tubo. \n* Con la pantalla rectangular. En este caso, se denomina \"barra m\u00E1gica\", el fundamento de funcionamiento es el mismo, solo que la pantalla est\u00E1 en un lado, con el f\u00F3sforo depositado directamente sobre el vidrio. Aqu\u00ED se tiene una barra luminosa que crece del centro hacia los lados, o desde los lados al centro, o de un lado al otro, seg\u00FAn la versi\u00F3n."@es . . . . . . . . "A magic eye tube or tuning indicator, in technical literature called an electron-ray indicator tube, is a vacuum tube which gives a visual indication of the amplitude of an electronic signal, such as an audio output, radio-frequency signal strength, or other functions. The magic eye (also called a cat's eye, or tuning eye in North America) is a specific type of such a tube with a circular display similar to the EM34 illustrated. Its first broad application was as a tuning indicator in radio receivers, to give an indication of the relative strength of the received radio signal, to show when a radio station was properly tuned in. The magic eye tube was the first in a line of development of cathode ray type tuning indicators developed as a cheaper alternative to needle movement meters. It was not until the 1960s that needle meters were made economically enough in Japan to displace indicator tubes. Tuning indicator tubes were used in vacuum tube receivers from around 1936 to 1980, before vacuum tubes were replaced by transistors in radios. An earlier tuning aid which the magic eye replaced was the \"tuneon\" neon lamp."@en . "\u0152il magique (\u00E9lectronique)"@fr . . "\u5E7B\u773C\u7BA1\uFF08\u82F1\u8A9E\uFF1Atuning indicator\uFF09\uFF0C\u4EA6\u7A31\u5E7B\u773C\u7BA1\uFF08Magic eye tube\uFF09\u3001\u8C93\u773C\u7BA1\uFF0C\u662F\u4E00\u7A2E\u71B1\u771F\u7A7A\u96FB\u5B50\u7BA1\uFF0C\u7528\u4F86\u7D66\u51FA\u97F3\u6548\u8F38\u51FA\u3001\u8A0A\u865F\u5F37\u5EA6\u6216\u5176\u4ED6\u529F\u80FD\u7684\u8996\u89BA\u4FE1\u865F\uFF0C\u7D04\u65BC1936\u5E74\u4E4B\u5F8C\u52A0\u5165\u6536\u97F3\u6A5F\u7684\u8A2D\u5099\u4E4B\u4E2D\uFF0C\u66FF\u4EE3\u8F03\u65E9\u7684 Tuneon \u9713\u8679\u71C8\u8ABF\u8AE7\u6307\u793A\u5668\u3002\u5BE6\u969B\u4E0A\uFF0C\u5E7B\u773C\u7BA1\u662F\u4E00\u7A2E\u5FAE\u578B\u7684\u9670\u6975\u5C04\u7DDA\u7BA1\uFF0C\u901A\u5E38\u6703\u767C\u51FA\u7DA0\u5149\uFF0C\u4E14\u87A2\u5E55\u4E0A\u672A\u767C\u5149\u7684\u90E8\u4EFD\u5728\u8ABF\u6E96\u5230\u548C\u767C\u5C04\u53F0\u540C\u983B\u6642\u6703\u8B8A\u7A84\uFF0C\u56E0\u800C\u986F\u793A\u51FA\u8A0A\u865F\u7684\u300C\u9AD8\u5CF0\u300D\u3002\u5E7B\u773C\u7BA1\u7684\u4F7F\u7528\u76EE\u7684\u5373\u5728\u65BC\u5E6B\u52A9\u8ABF\u81F3\u6700\u5F37\u7684\u767C\u5C04\u53F0\u983B\u7387\u3002\u5E7B\u773C\u7BA1\u5728\u8996\u89BA\u4E0A\u7684\u5E6B\u52A9\u4F7F\u5F97\u8A0A\u865F\u5F37\u5EA6\u6BD4\u8D77\u55AE\u7368\u7528\u8033\u6735\u91CF\u6E2C\u8981\u4F86\u5F97\u5BB9\u6613\u5F97\u591A\u3002 \u75761950\u5E74\u4EE3\u65E9\u671F\uFF0CFM\u6536\u97F3\u6A5F\u958B\u59CB\u5728\u82F1\u570B\u5E02\u5834\u4E0A\u51FA\u73FE\u6642\uFF0C\u8A31\u591A\u578B\u5F0F\u7684\u5E7B\u773C\u7BA1\u4E5F\u8DDF\u8457\u51FA\u73FE\u3002\u96D6\u7136\u6709\u8A31\u591A\u4E0D\u540C\u7684\u5916\u89C0\uFF0C\u4F46\u904B\u4F5C\u539F\u7406\u90FD\u662F\u4E00\u6A23\u7684\u3002\u4E00\u4E9B\u5E7B\u773C\u7BA1\u751A\u81F3\u6709\u5206\u5225\u7684\u5C0F\u87A2\u5E55\u4F86\u986F\u793AFM\u7684\u7ACB\u9AD4\u8072\u591A\u8DEF\u50B3\u8F38\u63A5\u6536\u3002 \u5E7B\u773C\u7BA1\u4EA6\u88AB\u4F7F\u7528\u5728\u958B\u76E4\u5F0F\u9304\u97F3\u6A5F\u4E0A\u982D\uFF0C\u4EE5\u505A\u70BA\u7684\u91CF\u8868\u3002"@zh . "\u30DE\u30B8\u30C3\u30AF\u30A2\u30A4 (magic eye tube) \u306F\u3001\u771F\u7A7A\u7BA1\u306E\u4E00\u7A2E\u3002\u7A2E\u5225\u3068\u3057\u3066\u306F\u8868\u793A\u7BA1\u306B\u5206\u985E\u3055\u308C\u308B\u3002\u304B\u3064\u3066\u306E\u30E9\u30B8\u30AA\u53D7\u4FE1\u6A5F\u3084\u30AA\u30FC\u30C7\u30A3\u30AA\u6A5F\u5668\u306B\u4F7F\u7528\u3055\u308C\u3001\u30E9\u30B8\u30AA\u306E\u53D7\u4FE1\u5F37\u5EA6\u3084\u540C\u8ABF\u72B6\u614B\u3001\u51FA\u529B\u4FE1\u53F7\u306E\u5F37\u5EA6\u306A\u3069\u3092\u86CD\u5149\u8868\u793A\u3059\u308B\u3002\u65E5\u672C\u8A9E\u3067\u306F\u540C\u8ABF\u6307\u793A\u7BA1\uFF08\u3069\u3046\u3061\u3087\u3046\u3057\u3058\u304B\u3093\uFF09\u3068\u547C\u3070\u308C\u308B\u3002 \u8868\u793A\u90E8\u306E\u5F62\u306F\u8907\u6570\u3042\u308B\u304C\u3001\u3082\u3063\u3068\u3082\u3088\u304F\u77E5\u3089\u308C\u3066\u3044\u308B\u30BF\u30A4\u30D7\u306F\u3001\u5186\u5F62\u90E8\u306B\u6247\u304C\u91CD\u306A\u308B\u3088\u3046\u306B\u8868\u793A\u3055\u308C\u308B\u30BF\u30A4\u30D7\u3067\u3042\u308B\uFF08\u53F3\u8A18\u5199\u771F\u53C2\u7167\uFF09\u3002 1937\u5E74\u306B\u30A2\u30EC\u30F3\u30FB\u30C7\u30E5\u30E2\u30F3\u535A\u58EB\u306B\u3088\u3063\u3066\u767A\u660E\u3055\u308C\u3066\u4EE5\u964D\u3001\u3059\u3050\u306B\u30E9\u30B8\u30AA\u53D7\u4FE1\u6A5F\u306E\u524D\u9762\u306B\u88C5\u7740\u3055\u308C\u306F\u3058\u3081\u3001\u305D\u308C\u307E\u3067\u4E00\u822C\u7684\u3060\u3063\u305F\u300CTuneon\u300D\u3068\u547C\u3070\u308C\u308B\u30CD\u30AA\u30F3\u7BA1\u3092\u6B21\u3005\u3068\u99C6\u9010\u3057\u3066\u3044\u3063\u305F\u3002 \u65E5\u672C\u306B\u304A\u3044\u3066\u306F\u30011950\u5E74\u4EE3\u521D\u982D\uFF08\u662D\u548C27 - 28\u5E74\u9803\uFF09\u306B\u767A\u58F2\u3055\u308C\u305F\u30E9\u30B8\u30AA\u304B\u3089\u5F90\u3005\u306B\u642D\u8F09\u3055\u308C\u3066\u3044\u3063\u305F\u3002"@ja . . . . . "Magic eye tube"@en . . "\u5E7B\u773C\u7BA1"@zh . . "\u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u0639\u064A\u0646 \u0627\u0644\u0633\u062D\u0631\u064A\u0629"@ar . . . . . . . . . . . . "\u30DE\u30B8\u30C3\u30AF\u30A2\u30A4"@ja . "\u042D\u043B\u0435\u043A\u0442\u0440\u043E\u043D\u043D\u043E-\u0441\u0432\u0435\u0442\u043E\u0432\u043E\u0439 \u0438\u043D\u0434\u0438\u043A\u0430\u0442\u043E\u0440 \u00AB\u043C\u0430\u0433\u0438\u0447\u0435\u0441\u043A\u0438\u0439 \u0433\u043B\u0430\u0437\u00BB \u2014 \u044D\u043B\u0435\u043A\u0442\u0440\u043E\u0432\u0430\u043A\u0443\u0443\u043C\u043D\u044B\u0439 \u043F\u0440\u0438\u0431\u043E\u0440, \u043F\u0440\u0435\u0434\u043D\u0430\u0437\u043D\u0430\u0447\u0435\u043D\u043D\u044B\u0439 \u0434\u043B\u044F \u043F\u0440\u0438\u0431\u043B\u0438\u0437\u0438\u0442\u0435\u043B\u044C\u043D\u043E\u0433\u043E \u0432\u0438\u0437\u0443\u0430\u043B\u044C\u043D\u043E\u0433\u043E \u043E\u0442\u043E\u0431\u0440\u0430\u0436\u0435\u043D\u0438\u044F \u0437\u043D\u0430\u0447\u0435\u043D\u0438\u044F \u0430\u043D\u0430\u043B\u043E\u0433\u043E\u0432\u044B\u0445 \u0432\u0435\u043B\u0438\u0447\u0438\u043D, \u0432\u044B\u0440\u0430\u0436\u0435\u043D\u043D\u044B\u0445 \u0432 \u044D\u043B\u0435\u043A\u0442\u0440\u0438\u0447\u0435\u0441\u043A\u043E\u0439 \u0444\u043E\u0440\u043C\u0435."@ru . . "\u5E7B\u773C\u7BA1\uFF08\u82F1\u8A9E\uFF1Atuning indicator\uFF09\uFF0C\u4EA6\u7A31\u5E7B\u773C\u7BA1\uFF08Magic eye tube\uFF09\u3001\u8C93\u773C\u7BA1\uFF0C\u662F\u4E00\u7A2E\u71B1\u771F\u7A7A\u96FB\u5B50\u7BA1\uFF0C\u7528\u4F86\u7D66\u51FA\u97F3\u6548\u8F38\u51FA\u3001\u8A0A\u865F\u5F37\u5EA6\u6216\u5176\u4ED6\u529F\u80FD\u7684\u8996\u89BA\u4FE1\u865F\uFF0C\u7D04\u65BC1936\u5E74\u4E4B\u5F8C\u52A0\u5165\u6536\u97F3\u6A5F\u7684\u8A2D\u5099\u4E4B\u4E2D\uFF0C\u66FF\u4EE3\u8F03\u65E9\u7684 Tuneon \u9713\u8679\u71C8\u8ABF\u8AE7\u6307\u793A\u5668\u3002\u5BE6\u969B\u4E0A\uFF0C\u5E7B\u773C\u7BA1\u662F\u4E00\u7A2E\u5FAE\u578B\u7684\u9670\u6975\u5C04\u7DDA\u7BA1\uFF0C\u901A\u5E38\u6703\u767C\u51FA\u7DA0\u5149\uFF0C\u4E14\u87A2\u5E55\u4E0A\u672A\u767C\u5149\u7684\u90E8\u4EFD\u5728\u8ABF\u6E96\u5230\u548C\u767C\u5C04\u53F0\u540C\u983B\u6642\u6703\u8B8A\u7A84\uFF0C\u56E0\u800C\u986F\u793A\u51FA\u8A0A\u865F\u7684\u300C\u9AD8\u5CF0\u300D\u3002\u5E7B\u773C\u7BA1\u7684\u4F7F\u7528\u76EE\u7684\u5373\u5728\u65BC\u5E6B\u52A9\u8ABF\u81F3\u6700\u5F37\u7684\u767C\u5C04\u53F0\u983B\u7387\u3002\u5E7B\u773C\u7BA1\u5728\u8996\u89BA\u4E0A\u7684\u5E6B\u52A9\u4F7F\u5F97\u8A0A\u865F\u5F37\u5EA6\u6BD4\u8D77\u55AE\u7368\u7528\u8033\u6735\u91CF\u6E2C\u8981\u4F86\u5F97\u5BB9\u6613\u5F97\u591A\u3002 \u75761950\u5E74\u4EE3\u65E9\u671F\uFF0CFM\u6536\u97F3\u6A5F\u958B\u59CB\u5728\u82F1\u570B\u5E02\u5834\u4E0A\u51FA\u73FE\u6642\uFF0C\u8A31\u591A\u578B\u5F0F\u7684\u5E7B\u773C\u7BA1\u4E5F\u8DDF\u8457\u51FA\u73FE\u3002\u96D6\u7136\u6709\u8A31\u591A\u4E0D\u540C\u7684\u5916\u89C0\uFF0C\u4F46\u904B\u4F5C\u539F\u7406\u90FD\u662F\u4E00\u6A23\u7684\u3002\u4E00\u4E9B\u5E7B\u773C\u7BA1\u751A\u81F3\u6709\u5206\u5225\u7684\u5C0F\u87A2\u5E55\u4F86\u986F\u793AFM\u7684\u7ACB\u9AD4\u8072\u591A\u8DEF\u50B3\u8F38\u63A5\u6536\u3002 \u5E7B\u773C\u7BA1\u4EA6\u88AB\u4F7F\u7528\u5728\u958B\u76E4\u5F0F\u9304\u97F3\u6A5F\u4E0A\u982D\uFF0C\u4EE5\u505A\u70BA\u7684\u91CF\u8868\u3002"@zh . . "Ull m\u00E0gic"@ca . "\u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u0639\u064A\u0646 \u0627\u0644\u0633\u062D\u0631\u064A \u0623\u0648 \u0645\u0624\u0634\u0631 \u0627\u0644\u0636\u0628\u0637 \u060C \u0641\u064A \u0627\u0644\u0623\u062F\u0628\u064A\u0627\u062A \u0627\u0644\u0641\u0646\u064A\u0629 \u064A\u0633\u0645\u0649 \u0623\u0646\u0628\u0648\u0628 \u0645\u0624\u0634\u0631 \u0623\u0634\u0639\u0629 \u0627\u0644\u0625\u0644\u0643\u062A\u0631\u0648\u0646\u060C \u0648\u0628\u0627\u0644\u0625\u0646\u062C\u0644\u064A\u0632\u064A\u0629 (Magic eye tube) \u0639\u0628\u0627\u0631\u0629 \u0639\u0646 \u0623\u0646\u0628\u0648\u0628 \u0645\u0641\u0631\u063A \u064A\u0639\u0637\u064A \u0645\u0624\u0634\u0631\u064B\u0627 \u0645\u0631\u0626\u064A\u064B\u0627 \u0644\u0627\u062A\u0633\u0627\u0639 \u0627\u0644\u0625\u0634\u0627\u0631\u0629 \u0627\u0644\u0625\u0644\u0643\u062A\u0631\u0648\u0646\u064A\u0629\u060C \u0645\u062B\u0644 \u062E\u0631\u062C \u0627\u0644\u0635\u0648\u062A\u060C \u0648\u0642\u0648\u0629 \u0625\u0634\u0627\u0631\u0629 \u0627\u0644\u062A\u0631\u062F\u062F \u0627\u0644\u0644\u0627\u0633\u0644\u0643\u064A\u060C \u0623\u0648 \u0648\u0638\u0627\u0626\u0641 \u0623\u062E\u0631\u0649. \u0627\u0644\u0639\u064A\u0646 \u0627\u0644\u0633\u062D\u0631\u064A\u0629 (\u0648\u062A\u0633\u0645\u0649 \u0623\u064A\u0636\u064B\u0627 \u0639\u064A\u0646 \u0627\u0644\u0642\u0637\u060C \u0623\u0648 \u0639\u064A\u0646 \u0627\u0644\u062A\u0648\u0644\u064A\u0641 \u0641\u064A \u0623\u0645\u0631\u064A\u0643\u0627 \u0627\u0644\u0634\u0645\u0627\u0644\u064A\u0629) \u0647\u064A \u0646\u0648\u0639 \u0645\u0639\u064A\u0646 \u0645\u0646 \u0645\u062B\u0644 \u0647\u0630\u0627 \u0627\u0644\u0623\u0646\u0628\u0648\u0628 \u0645\u0639 \u0634\u0627\u0634\u0629 \u062F\u0627\u0626\u0631\u064A\u0629 \u062A\u0634\u0628\u0647 EM34 \u0627\u0644\u0645\u0648\u0636\u062D\u0629. \u0643\u0627\u0646 \u0623\u0648\u0644 \u062A\u0637\u0628\u064A\u0642 \u0648\u0627\u0633\u0639 \u0644\u0647 \u0628\u0645\u062B\u0627\u0628\u0629 \u0645\u0624\u0634\u0631 \u0636\u0628\u0637 \u0641\u064A \u0623\u062C\u0647\u0632\u0629 \u0627\u0633\u062A\u0642\u0628\u0627\u0644 \u0627\u0644\u0631\u0627\u062F\u064A\u0648\u060C \u0644\u0625\u0639\u0637\u0627\u0621 \u0625\u0634\u0627\u0631\u0629 \u0625\u0644\u0649 \u0627\u0644\u0642\u0648\u0629 \u0627\u0644\u0646\u0633\u0628\u064A\u0629 \u0644\u0625\u0634\u0627\u0631\u0629 \u0627\u0644\u0631\u0627\u062F\u064A\u0648 \u0627\u0644\u0645\u0633\u062A\u0642\u0628\u0644\u0629\u060C \u0644\u0625\u0638\u0647\u0627\u0631 \u0645\u062A\u0649 \u062A\u0645 \u0636\u0628\u0637 \u0645\u062D\u0637\u0629 \u0631\u0627\u062F\u064A\u0648 \u0628\u0634\u0643\u0644 \u0635\u062D\u064A\u062D."@ar . . . . "Elektronowy wska\u017Anik strojenia"@pl . . . . . "Occhio magico"@it . . "Elektronowy wska\u017Anik strojenia (magiczne oko) \u2013 pr\u00F3\u017Cniowa lampa elektronowa, kt\u00F3rej zadaniem jest sygnalizowanie poziomu napi\u0119cia. Stosowana by\u0142a jako wska\u017Anik wysterowania w radioodbiornikach i wzmacniaczach oraz wska\u017Anik r\u00F3wnowagi w mostkach pomiarowych."@pl . "Een indicatorbuis is een elektronenbuis die gebruikt werd in een radio-ontvanger als afstemindicator (afstemoog) om te kunnen beoordelen hoe sterk de ontvangst was van het ontvangen radiosignaal. Ook in bandrecorders werd een indicatorbuis gebruikt om tijdens de bandopname de signaalsterkte te kunnen beoordelen, opdat de band niet onder- of overstuurd zou worden. Een indicatorbuis is een eenvoudige vorm van een kathodestraalbuis. Een indicatorbuis werd wel kattenoog genoemd. De allereerste modellen (EM1, EM4) waren rond en afhankelijk van de signaalsterkte zag men onder en boven een nauwe groene streep bij weinig signaal tot bijna een halve cirkel bij een sterk signaal. Dit lijkt sterk op de reactie van een kattenoog op variaties in lichtsterkte. Na het ronde model kwam er een kleiner langwerpig model (zie afbeelding: EM84), waarin de uiteinden als twee in grootte variabele, verlichte vlakken zichtbaar waren.Philips heeft naast deze twee vormen nog een derde model indicatorbuis geproduceerd, de EM80. De getoonde indicatorbuis EM84 werd door Philips vanaf 1959 gemaakt. Voorlopers werden rond 1930 in de duurdere modellen radio's toegepast. Met de opkomst van de transistorradio in de jaren 60 werd de indicatorbuis vervangen door een signaalsterktemeter, gebaseerd op het principe van de draaispoelmeter."@nl . . . . "Magick\u00E9 oko"@cs . "Se llama ojo m\u00E1gico u ojo el\u00E9ctrico a una v\u00E1lvula termoi\u00F3nica desarrollada por RCA (Radio Corporation of America), que incluye una peque\u00F1a pantalla de rayos cat\u00F3dicos. Se utiliz\u00F3 principalmente como indicador de sinton\u00EDa en las radios de gama alta. Sol\u00EDa ser un pentodo (bulbo de cinco electrodos) y sol\u00EDa incluir un triodo que amplifica la se\u00F1al de entrada antes de aplicarla a un electrodo de deflexi\u00F3n de la parte de rayos cat\u00F3dicos. El efecto que se produce es que una zona luminosa crece o decrece seg\u00FAn el nivel de se\u00F1al. Esto hac\u00EDa que el usuario pudiese sintonizar el aparato perfectamente."@es . . . "\u041C\u0430\u0433\u0438\u0447\u0435\u0441\u043A\u0438\u0439 \u0433\u043B\u0430\u0437"@ru . "\u042D\u043B\u0435\u043A\u0442\u0440\u043E\u043D\u043D\u043E-\u0441\u0432\u0435\u0442\u043E\u0432\u043E\u0439 \u0438\u043D\u0434\u0438\u043A\u0430\u0442\u043E\u0440 \u00AB\u043C\u0430\u0433\u0438\u0447\u0435\u0441\u043A\u0438\u0439 \u0433\u043B\u0430\u0437\u00BB \u2014 \u044D\u043B\u0435\u043A\u0442\u0440\u043E\u0432\u0430\u043A\u0443\u0443\u043C\u043D\u044B\u0439 \u043F\u0440\u0438\u0431\u043E\u0440, \u043F\u0440\u0435\u0434\u043D\u0430\u0437\u043D\u0430\u0447\u0435\u043D\u043D\u044B\u0439 \u0434\u043B\u044F \u043F\u0440\u0438\u0431\u043B\u0438\u0437\u0438\u0442\u0435\u043B\u044C\u043D\u043E\u0433\u043E \u0432\u0438\u0437\u0443\u0430\u043B\u044C\u043D\u043E\u0433\u043E \u043E\u0442\u043E\u0431\u0440\u0430\u0436\u0435\u043D\u0438\u044F \u0437\u043D\u0430\u0447\u0435\u043D\u0438\u044F \u0430\u043D\u0430\u043B\u043E\u0433\u043E\u0432\u044B\u0445 \u0432\u0435\u043B\u0438\u0447\u0438\u043D, \u0432\u044B\u0440\u0430\u0436\u0435\u043D\u043D\u044B\u0445 \u0432 \u044D\u043B\u0435\u043A\u0442\u0440\u0438\u0447\u0435\u0441\u043A\u043E\u0439 \u0444\u043E\u0440\u043C\u0435."@ru . "August 2021"@en . . . "Een indicatorbuis is een elektronenbuis die gebruikt werd in een radio-ontvanger als afstemindicator (afstemoog) om te kunnen beoordelen hoe sterk de ontvangst was van het ontvangen radiosignaal. Ook in bandrecorders werd een indicatorbuis gebruikt om tijdens de bandopname de signaalsterkte te kunnen beoordelen, opdat de band niet onder- of overstuurd zou worden. Een indicatorbuis is een eenvoudige vorm van een kathodestraalbuis."@nl . "Ojo m\u00E1gico"@es . . . "L'occhio magico (magic eye in inglese) \u00E8 una speciale valvola termoionica che tramite la proiezione di un settore luminoso sulla superficie laterale del tubo, oppure sulla cupola, permette la rappresentazione visiva dell'intensit\u00E0 di un segnale elettrico. Tipiche erano per esempio le 6E5, le EM80, le EM84, e altre ancora. Con l'avvento dei semiconduttori nell'industria elettronica l'utilizzo degli occhi magici \u00E8 quasi scomparso: sono stati sostituiti principalmente dai display a LED e dai display LCD. Il principale problema che si riscontra nell'uso degli occhi magici valvolari \u00E8 la necessit\u00E0 di avere una tensione di alimentazione per l'occhio di almeno un centinaio di volt, assente nei dispositivi moderni a semiconduttori. Nei nuovi progetti a valvole il loro uso \u00E8 ancora abbastanza diffuso, perch\u00E9 la linea di alimentazione \u00E8 sempre presente (\u00E8 utilizzata dalle altre valvole). In molti radioricevitori a valvole gli occhi magici erano impiegati per mostrare l'esattezza nonch\u00E9 l'accuratezza della sintonia. Nei magnetofoni a nastro erano invece usati come indicatori del livello di registrazione. L'interno della valvola \u00E8 composto generalmente da un triodo pi\u00F9 la parte di visualizzazione vera e propria. Il triodo serve per amplificare la tensione di pilotaggio applicata, mentre la parte di visualizzazione \u00E8 un piccolo tubo a raggi catodici (CRT) che proietta un fascio di elettroni verso la parte della valvola visibile dall'esterno e ricoperta di fosfori azzurri P24 o talora P1 verdi. Variando la tensione di polarizzazione della griglia posta tra il catodo e lo schermo si modifica l'angolo d'incidenza degli elettroni e quindi appare un settore luminoso pi\u00F9 o meno ampio. Il segnale di polarizzazione che si applica all'ingresso \u00E8 generalmente preso a valle del rivelatore dove esiste un legame diretto tra l'intensit\u00E0 del segnale ricevuto e la tensione continua generata. Questo segnale viene anche impiegato per modificare il guadagno del primo stadio del ricevitore, evitando cos\u00EC eccessive variazioni di volume nel passaggio tra una stazione vicina ed una lontana (fenomeno noto come evanescenza o fading). Tale segnale \u00E8 comunemente detto CAV, ovvero Controllo Automatico del Volume. Una tecnica utilizzata attualmente per ravvivare la luminosit\u00E0 degli occhi magici esauriti consiste nel sovralimentarli con una tensione anodica molto alta, fino a 600 V."@it . "Magisches Auge ist die umgangssprachliche Bezeichnung f\u00FCr eine Abstimmanzeiger\u00F6hre, eine spezielle Elektronenr\u00F6hre, welche die St\u00E4rke eines Signals nach dem Prinzip der Bargraph-Anzeige als Leuchtbalken oder -sektor anzeigt und oft in \u00E4lteren Radioger\u00E4ten, aber auch in Fernsehger\u00E4ten eingebaut ist. Auch Tonbandger\u00E4te, Audioverst\u00E4rker und andere Ger\u00E4te besa\u00DFen ein Magisches Auge als Pegelanzeige. In mit Elektronenr\u00F6hren best\u00FCckten Empfangsger\u00E4ten aus der Mitte des 20. Jahrhunderts bis in die 1970er Jahre zeigt sowohl das \u201EMagische Auge\u201C als auch das sp\u00E4ter aufkommende \"Magische Band\" an, wie genau das Ger\u00E4t auf die Sendefrequenz des zu empfangenden Senders eingestellt ist. Die Anzeiger\u00F6hre \u00FCbernimmt dabei die Funktion einer Abstimmanzeige, wof\u00FCr \u00FCblicherweise die Regelspannung des Empf\u00E4ngers direkt verwendet wird. Der Grund f\u00FCr die Verwendung dieser (simplen) Anzeige liegt darin, dass f\u00FCr damalige Empfangsger\u00E4te wie Radios zwar Regeleinrichtungen wie Phasenregelschleifen f\u00FCr das automatische Einstellen, Abgleichen und laufende Nachjustieren der Empfangsfrequenz verf\u00FCgbar waren, diese aber technisch so aufw\u00E4ndig und teuer waren, dass nur Luxusger\u00E4te damit ausgestattet wurden."@de . . . "12181134"^^ . 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