{"product_id":"12ax7-ecc83-nos-baldwin-by-sylvania-matched-quad-long-gray-plates-halo-getter-usa-61","title":"12AX7 \/ ECC83 NOS Baldwin by SYLVANIA Matched Quad Long Gray Plates Halo Getter USA '61","description":"\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e12AX7 \/ ECC83 NOS Baldwin by SYLVANIA Gray Plates Halo Getter Matched Quad Made in USA 1961\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eMatched Quad – AMPLITREX Tested – Vintage American Sylvania Production\u003c\/b\u003e\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\u003cspan\u003e Va = 250V ; Vg = -2V\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia 100%:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1600 ; Ia = 1.2 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\n\u003cstrong\u003eValvola #13:\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eSezione 1: Gm = 1800 ; Ia = 1.3 mA\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e Sezione 2: Gm = 1800 ; Ia = 1.2 mA\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValvola #9\u003c\/strong\u003e:\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e Sezione 1: Gm = 1900 ; Ia = 1.5 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e Sezione 2: Gm = 1800 ; Ia = 1.3 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cstrong\u003eValvola #11:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e Sezione 1: Gm = 1800 ; Ia = 1.3 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e Sezione 2: Gm = 1900 ; Ia = 1.4 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 = 1900 ; Ia = 1.4 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e Sezione 2: Gm = 1800 ; Ia = 1.2 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eTest Addizionali eseguiti\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"p2\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003eBurn-in \/ Stability Test:\u003c\/strong\u003e 48h – OK\u003c\/li\u003e\n\u003cli class=\"p3\"\u003e\n\u003cb\u003eMicrofonicità:\u003c\/b\u003e Standard. Testate e conformi per l’impiego in apparecchi hi-fi e amplificatori per chitarra. Consigliate nelle posizioni V2, V3 e V4, come driver o negli stadi meno critici. Per V1 e per le posizioni ad altissimo guadagno particolarmente sensibili alla microfonicità, consigliamo una valvola con selezione a bassa microfonicità.\u003c\/li\u003e\n\u003cli class=\"p3\"\u003e\n\u003cb\u003eBilanciamento:\u003c\/b\u003e Le sezioni risultano coerenti e ben allineate, rendendo le valvole idonee anche all’impiego come phase inverter in applicazioni hi-fi e strumentali.\u003c\/li\u003e\n\u003cli class=\"p3\"\u003e\n\u003cb\u003eQualità dell’Emissione:\u003c\/b\u003e Eccellente – emissione molto forte e stabile, senza fluttuazioni.\u003c\/li\u003e\n\u003cli class=\"p2\"\u003e\n\u003cb\u003eCortocircuiti e GAS:\u003c\/b\u003e\u003cspan class=\"s2\"\u003e Assenti.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eDescrizione\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eQuartetto matched di \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12AX7 \/ ECC83 NOS Baldwin by Sylvania\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, produzione \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eMade in USA, 1961\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, selezionato per applicazioni hi-fi e musicali compatibili dove sono richieste coerenza tra i canali, buona stabilità operativa e autentico carattere sonoro americano vintage.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLe valvole marchiate Baldwin erano destinate agli organi elettronici di fascia alta dell’epoca, dove affidabilità, lunga durata e uniformità di funzionamento rappresentavano requisiti fondamentali. In questo caso la produzione è riconducibile a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSylvania Made in USA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, con costruzione \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGray Plates\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e e \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHalo Getter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, configurazione apprezzata per equilibrio timbrico, apertura e musicalità naturale.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLe valvole sono in condizioni \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNOS – New Old Stock\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, con struttura interna ben conservata, valori elettrici molto forti e serigrafie ancora ben leggibili. Vedere foto per i dettagli estetici.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIl quartetto è stato accuratamente testato e selezionato tramite \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAmplitrex AT-1000 Tube Tester\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e come \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eMatched Quad\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, con risultato \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eMOLTO FORTE\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e su tutte le valvole. Il grado di microfonicità è \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eStandard\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: le valvole sono testate e conformi per l’impiego in apparecchi hi-fi e amplificatori per chitarra, particolarmente indicate nelle posizioni \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eV2, V3 e V4\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, come driver o negli stadi meno critici. Per \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eV1\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e e per le posizioni ad altissimo guadagno particolarmente sensibili alla microfonicità, consigliamo invece una selezione specifica \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLow Noise \u0026amp; Microphonics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDal punto di vista sonoro offrono una resa equilibrata, aperta e coinvolgente, con bassi controllati, medi naturali e ricchi, alti puliti e dettagliati ma non aggressivi. La scena sonora risulta ordinata e stabile, con buona coerenza tra i canali e il tipico carattere musicale della produzione Sylvania americana dei primi anni ’60.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIndicate per preamplificatori valvolari, amplificatori integrati hi-fi, driver stage, DAC valvolari, buffer, line stage, restauri vintage e amplificatori per strumenti compatibili con \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12AX7 \/ ECC83\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUn quartetto \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNOS Sylvania\/Baldwin\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e realmente selezionato, testato e abbinato da \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVacuum Tubes Treasures\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, ideale per chi cerca quattro \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12AX7 \/ ECC83 americane\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e forti, musicali e coerenti, con l’affidabilità e il fascino della produzione USA d’epoca.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eCondizioni:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondizioni:\u003c\/strong\u003e NOS - New Old Stock - Testata e funzionante - Fornite in nostra scatola personalizzata per una protezione ottimale.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunzionalità: \u003c\/strong\u003ePerfettamente operativa.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondizioni estetiche:\u003c\/strong\u003e Eccellenti – Scritte ottimamente conservate, minimi segni del tempo. Vedi foto per i dettagli.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCodice di Fabbricazione: \u003c\/strong\u003e312 152 → 312 indica il fabbricante, ovvero Sylvania Electric Products Inc., Emporium, Pa. - 152 → 1 ( su tre cifre ) → 1961 - 52 → 52a settimana dell'anno\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"Perché le nostre valvole sono diverse – il protocollo VTT che migliora suono, affidabilità e durata\" href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" target=\"_blank\"\u003e\u003cstrong\u003eScopra perché le nostre valvole sono diverse →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":58837960458588,"sku":"03756","price":259.8,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/2_0a4dc788-02a7-4b01-862a-5f00bf98bd30.jpg?v=1787824363","url":"https:\/\/vacuumtubestreasures.com\/it-ee\/products\/12ax7-ecc83-nos-baldwin-by-sylvania-matched-quad-long-gray-plates-halo-getter-usa-61","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}