{"product_id":"6v6gt-nos-gm-by-raytheon-black-plates-smoked-glass-square-getter-matched-pair-tubes-usa-1957","title":"6V6GT NOS GM by Raytheon Black Plates Smoked Glass Square Getter Matched Pair Tubes USA 1957","description":"\u003ch3\u003e\u003cstrong\u003e6V6GT NOS GM by Raytheon Black Plates Smoked Glass Square Getter Tubes - Made in USA 1957\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eAMPLITREX Matched –\u003cspan\u003e VERY STRONG - Vintage American Raytheon Production\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\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 \u003cmeta charset=\"utf-8\"\u003eVa = 250V; Vg2 = 250V; Vg = -12.5V \u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia 100%:\u003c\/strong\u003e\u003cspan\u003e \u003cmeta charset=\"utf-8\"\u003eGm = 4.1 ; Ia = 45 mA\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRisultato del Test:\u003c\/strong\u003e MOLTO FORTE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eValvola 1:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eGm = 4.21 ; Ia = 42.6 mA\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eValvola 2:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eGm = 3.90 ; Ia = 40.6 mA\u003c\/span\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cstrong\u003eTest Addizionali eseguiti:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eMicrofonicità:\u003c\/strong\u003e Bassa. Testate e conformi per l’impiego in apparecchiature hi-fi e amplificatori per chitarra.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eQualità dell’Emissione:\u003c\/strong\u003e Eccellente – Emissione molto forte e stabile, senza fluttuazioni.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eCortocircuiti e GAS:\u003c\/strong\u003e Assenti.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eDescrizione:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eCoppia selezionata di \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e6V6GT NOS – New Old Stock\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, commercializzata con marchio \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGM\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e e costruita negli Stati Uniti da \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eRaytheon Manufacturing Company\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Il codice \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e280 717\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e identifica lo stabilimento Raytheon di Waltham, Massachusetts, e colloca la produzione nella \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e17ª settimana del 1957\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLa costruzione è quella più ricercata delle Raytheon americane degli anni Cinquanta: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eplacche nere, vetro fumé e square getter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Una configurazione di grande fascino storico, apprezzata tanto dagli estimatori del suono valvolare vintage quanto da chi ricerca componenti originali per amplificatori d’epoca e realizzazioni boutique.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLe due valvole sono state accuratamente selezionate e abbinate su \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAmplitrex AT-1000\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. La Valvola 1 ha registrato \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGm 4,21 mA\/V e Ia 42,6 mA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, mentre la Valvola 2 misura \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGm 3,90 mA\/V e Ia 40,6 mA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Lo scarto è contenuto entro circa l’\u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e8% sulla transconduttanza\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e e il \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e5% sulla corrente anodica\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, confermando un abbinamento solido e coerente per l’impiego in stadi finali push-pull compatibili con la 6V6GT.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eI valori di transconduttanza si collocano rispettivamente a circa il \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e103% e il 95% del riferimento nominale\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, accompagnati da correnti anodiche forti e molto vicine. Entrambe le valvole hanno mostrato \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eemissione molto forte e stabile\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, bassa microfonicità e completa assenza di gas, cortocircuiti o fluttuazioni.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSul piano sonoro, le Raytheon black plate degli anni Cinquanta sono generalmente apprezzate per una presentazione \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003edinamica, corposa e naturale\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, con medi ricchi e ben articolati, basse frequenze solide e una gamma alta definita senza eccessiva aggressività. Sono particolarmente interessanti per amplificatori hi-fi vintage e amplificatori per chitarra nei quali si desideri una risposta musicale, autorevole e autenticamente americana.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLa coppia è proposta come \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNOS – New Old Stock\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, testata e perfettamente funzionante. Le scritte sono ottimamente conservate e le condizioni estetiche risultano eccellenti, con solamente minimi segni dovuti al tempo. Fornita nelle scatole personalizzate Vacuum Tubes Treasures.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUna coppia Raytheon del 1957 di grande interesse, selezionata per \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ematching accurato, emissione molto forte e prestigiosa costruzione black plate con smoked glass e square getter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\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\u003eStato:\u003c\/strong\u003e NOS - New Old Stock - Testata e funzionante - Fornite in nostra scatola personalizzata per una protezione ottimale. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunzionalità:\u003c\/strong\u003e Perfettamente operative.\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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCodice di fabbricazione:\u003c\/strong\u003e 280 717 → 280 → Raytheon Manufacturing Company, Waltham 54, Mass. ; \u003cmeta charset=\"utf-8\"\u003e717 → RMA\/EIA Open Date Code → fabbricata la 17ª settimana del 1957\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\"\u003e\u003cstrong\u003eScopra perché le nostre valvole sono diverse →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"RAYTHEON","offers":[{"title":"Default Title","offer_id":59265577025884,"sku":"03838T","price":179.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/2_3d5de8f7-79bc-4d10-8716-d6d28820d198.jpg?v=1790244444","url":"https:\/\/vacuumtubestreasures.com\/it-ee\/products\/6v6gt-nos-gm-by-raytheon-black-plates-smoked-glass-square-getter-matched-pair-tubes-usa-1957","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}