{"product_id":"12au7-ecc82-baldwin-by-rca-amplitrex-matched-quad-clear-top-long-gray-plates-side-d-getter-tubes","title":"12AU7 \/ ECC82 Baldwin by RCA AMPLITREX Matched Quad Clear Top Long Gray Plates Side D Getter Tubes","description":"\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e12AU7 \/ ECC82 Baldwin by RCA Matched Quad – Clear Top – Long Gray Plates – Side D Getter – Made in USA ’59\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eAmplitrex Tested – MOLTO FORTE – Low Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescrizione Generale:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eQuesto \u003cspan class=\"s1\"\u003e\u003cb\u003equartetto selezionato di 12AU7 \/ ECC82 Baldwin by RCA – Made in USA, circa 1959\u003c\/b\u003e\u003c\/span\u003e rappresenta una delle configurazioni più interessanti della produzione americana di fine anni ’50.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eLe valvole marchiate \u003cspan class=\"s1\"\u003e\u003cb\u003eBaldwin\u003c\/b\u003e\u003c\/span\u003e erano spesso prodotte da RCA per applicazioni organistiche, seguendo standard qualitativi elevati e una selezione orientata alla stabilità e alla coerenza nel tempo.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eLa configurazione costruttiva è particolarmente distintiva:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eClear Top\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eLong Gray Plates\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eSide D Getter\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eIl design \u003cspan class=\"s1\"\u003e\u003cb\u003eClear Top\u003c\/b\u003e\u003c\/span\u003e, tipico di alcune produzioni RCA, favorisce una dissipazione più efficiente e una risposta più aperta e lineare, contribuendo a una resa sonora pulita e ben definita.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eIl quartetto proviene dallo \u003cspan class=\"s1\"\u003e\u003cb\u003estesso lotto di fabbricazione\u003c\/b\u003e\u003c\/span\u003e ed è stato sottoposto a una selezione accurata tramite \u003cspan class=\"s1\"\u003e\u003cb\u003eAmplitrex AT-1000\u003c\/b\u003e\u003c\/span\u003e, risultando un\u003cspan class=\"s1\"\u003e\u003cb\u003e matched quad\u003c\/b\u003e\u003c\/span\u003e con valori estremamente ravvicinati:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eRange Gm medio quartetto: 0.0%\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eRange Ia medio quartetto: 1.1%\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eTutte le valvole sono classificate \u003cspan class=\"s1\"\u003e\u003cb\u003eMOLTO FORTE\u003c\/b\u003e\u003c\/span\u003e\u003cspan class=\"s2\"\u003e, con \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eemissione stabile\u003c\/b\u003e\u003c\/span\u003e\u003cspan class=\"s2\"\u003e, \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003ebassa rumorosità e microfonicità\u003c\/b\u003e\u003c\/span\u003e\u003cspan class=\"s2\"\u003e, e \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eburning test superato\u003c\/b\u003e\u003c\/span\u003e\u003cspan class=\"s2\"\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eCaratteristiche Sonore\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p2\"\u003eQuesto quartetto Baldwin by RCA offre una firma sonora \u003cspan class=\"s1\"\u003e\u003cb\u003eequilibrata, trasparente e altamente coerente\u003c\/b\u003e\u003c\/span\u003e, con una presentazione che privilegia precisione, naturalezza e controllo.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eLa costruzione Clear Top, unita alle placche lunghe, restituisce un suono pulito e articolato, con una notevole capacità di mantenere ordine e definizione anche nei passaggi più complessi.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eBassi\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eRapidi e ben controllati, con ottima articolazione.\u003cbr\u003eNon invadenti, ma sempre presenti e funzionali alla struttura del messaggio sonoro.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eMedi\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eLineari e molto leggibili.\u003cbr\u003eLe voci emergono con chiarezza, mantenendo una resa naturale e priva di colorazioni eccessive.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eAlti\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eAperti e puliti, con una buona estensione.\u003cbr\u003eMai aggressivi, contribuiscono a una sensazione generale di aria e trasparenza.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eDinamica\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eReattiva e precisa, con una gestione molto controllata dei transienti.\u003cbr\u003eOttima sia nella micro che nella macro dinamica.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eSoundstage\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eOrdinato e ben focalizzato, con una separazione degli strumenti chiara e una scena stabile.\u003c\/p\u003e\n\u003ch3 data-start=\"1884\" data-end=\"1924\"\u003e🎧 \u003cstrong\u003eUso in Amplificatori Hi-Fi\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eQuesto quartetto si presta perfettamente per applicazioni hi-fi di livello:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003epreamplificatori di linea\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003estadi phono\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003edriver e buffer\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eLa combinazione di \u003cspan class=\"s1\"\u003e\u003cb\u003ematching professionale\u003c\/b\u003e\u003c\/span\u003e, bassa rumorosità e stabilità operativa lo rende ideale per sistemi in cui coerenza e silenziosità sono fondamentali.\u003c\/p\u003e\n\u003ch3 data-start=\"2243\" data-end=\"2293\"\u003e🎸 \u003cstrong\u003eUso in Amplificatori per Strumenti Musicali\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eIn ambito musicale offre:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003erisposta molto controllata\u003c\/li\u003e\n\u003cli\u003eottima definizione anche in contesti ad alto guadagno\u003c\/li\u003e\n\u003cli\u003ecomportamento prevedibile e coerente tra le valvole\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eParticolarmente indicato per configurazioni dove è richiesta uniformità tra più stadi.\u003c\/p\u003e\n\u003ch3 data-start=\"2566\" data-end=\"2601\"\u003e🎯 \u003cstrong\u003eNota per audiofili e tecnici\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eBaldwin by RCA – Made in USA (circa 1959)\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eClear Top – Long Gray Plates – Side D Getter\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eStesso lotto di fabbricazione\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eMatched Quad reale\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eClassificazione VTT: MOLTO FORTE\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p2\"\u003eQuesto quartetto rappresenta una soluzione \u003cspan class=\"s1\"\u003e\u003cb\u003edi alto livello\u003c\/b\u003e\u003c\/span\u003e, pensata per chi desidera un set realmente coerente, selezionato con criterio e pronto per essere integrato in sistemi esigenti.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eNon si tratta di un semplice insieme di valvole, ma di un \u003cspan class=\"s1\"\u003e\u003cb\u003equartetto costruito e verificato per lavorare insieme\u003c\/b\u003e\u003c\/span\u003e, offrendo stabilità, precisione e una resa sonora affidabile nel tempo.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eUna selezione che esprime appieno il valore della produzione americana RCA, nel pieno stile Vacuum Tubes Treasures.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eRisultati dei Test:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eValvola testata su \u003cstrong\u003eAMPLITREX AT-1000 \u003c\/strong\u003eTube Tester:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondizioni di Test:\u003c\/strong\u003e Va = 250V ; Vg = -8.5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia 100%:\u003c\/strong\u003e Gm = 2200 ; Ia = 10.5 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRisultato del Test:\u003c\/strong\u003e MOLTO FORTE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cstrong\u003eValvola #15:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e Sezione 1: Gm = 2000 ; Ia = 9.0 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e Sezione 2: Gm = 2100 ; Ia = 9.8 mA\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cstrong\u003eValvola #17:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e Sezione 1: Gm = 2000 ; Ia = 9.2 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e Sezione 2: Gm = 2100 ; Ia = 9.8 mA\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cstrong\u003eValvola #19:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e Sezione 1: Gm = 2100 ; Ia = 9.6 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e Sezione 2: Gm = 2000 ; Ia = 9.2 mA\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cstrong\u003eValvola #20:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e Sezione 1: Gm = 2000 ; Ia = 9.2 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e Sezione 2: Gm = 2100 ; Ia = 9.6 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cstrong\u003eTest Addizionali eseguiti:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicrofonicità:\u003c\/strong\u003e Bassa. Testate e conformi per l'uso in hi-fi anche in stadi phono e in amplificatori per chitarra. Adatte anche in V1.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBilanciamento:\u003c\/strong\u003e Le sezioni risultano coerenti e ben allineate, rendendo la valvola idonea anche all’impiego come phase inverter in applicazioni hi-fi e strumentali.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQualità dell’Emissione:\u003c\/strong\u003e Eccellente – Emissione molto forte e stabile, senza fluttuazioni.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCortocircuiti e GAS:\u003c\/strong\u003e Assenti.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eCondizioni:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondizioni:\u003c\/strong\u003e Vintage - Testata e funzionante - Fornite in nostra scatola personalizzata per una protezione ottimale. \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunzionalità:\u003c\/strong\u003e Perfettamente operativa.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondizioni estetiche:\u003c\/strong\u003e Sufficienti – Scritte quasi completamente scomparse. Vedi foto per i dettagli.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCodice di Fabbricazione:\u003c\/strong\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e59-26 274 → RMA\/EIA Open Date Code → fabbricata la 26ª settimana del 1959 - 274 → Radio Corporation of America, Camden, N. J.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" title=\"Perché le nostre valvole sono diverse – il protocollo VTT che migliora suono, affidabilità e durata\" rel=\"noopener\" target=\"_blank\"\u003eScopra perché le nostre valvole sono diverse →\u003c\/a\u003e\u003c\/p\u003e","brand":"RCA","offers":[{"title":"Default Title","offer_id":57389925892444,"sku":"03540","price":159.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_362bbdc7-cca0-4649-85d2-fb795d98286c.jpg?v=1776528360","url":"https:\/\/vacuumtubestreasures.com\/it-hr\/products\/12au7-ecc82-baldwin-by-rca-amplitrex-matched-quad-clear-top-long-gray-plates-side-d-getter-tubes","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}