{"product_id":"12au7a-ecc82-nos-sylvania-long-gray-plates-halo-getter-matched-sextet-tubes-usa-1953","title":"12AU7A ECC82 NOS Baldwin by Sylvania Matched Sextet Long Gray Plates Halo Getter Tubes USA '61","description":"\u003cp\u003e\u003cstrong\u003e12AU7A ( ECC82 ) NOS Baldwin by SYLVANIA Long Gray Plates Halo Getter Matched Sextet Same Data Codes Tubes Made in USA '61\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThe \u003cspan class=\"s1\"\u003e\u003cb\u003e12AU7A \/ ECC82 NOS Baldwin by Sylvania\u003c\/b\u003e\u003c\/span\u003e, in a \u003cspan class=\"s1\"\u003e\u003cb\u003eMatched Sextet\u003c\/b\u003e\u003c\/span\u003e, with \u003cspan class=\"s1\"\u003e\u003cb\u003elong gray plates\u003c\/b\u003e\u003c\/span\u003e and \u003cspan class=\"s1\"\u003e\u003cb\u003ehalo getter\u003c\/b\u003e\u003c\/span\u003e, produced in the \u003cspan class=\"s1\"\u003e\u003cb\u003eUSA in 1961\u003c\/b\u003e\u003c\/span\u003e, offers significant historical and sonic value. This is a Baldwin selection based on very early Sylvania production, prized for its build quality, operational stability, and excellent tonal consistency among units.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe sextet has been carefully selected in our laboratory and features \u003cspan class=\"s1\"\u003e\u003cb\u003elow noise and contained microphonics\u003c\/b\u003e\u003c\/span\u003e, a fundamental requirement for multi-tube applications and high-resolution systems. The \u003cspan class=\"s1\"\u003e\u003cb\u003eMatched Sextet\u003c\/b\u003e\u003c\/span\u003e configuration ensures uniform electrical behavior and consistent, predictable sound reproduction across all channels.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eSonic Characteristics\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp class=\"p4\"\u003e\u003cb\u003eBass: \u003c\/b\u003eSolid and well-articulated, with a natural and controlled response. The low end is present without being heavy, ideal for providing foundation and authority to the musical message.\u003c\/p\u003e\n\u003cp class=\"p4\"\u003e\u003cb\u003eMids: \u003c\/b\u003eWarm, full, and textured. Vocals are credible and rich in harmonics, with a typical Sylvania texture: elegant, fluid, and musical.\u003c\/p\u003e\n\u003cp class=\"p4\"\u003e\u003cb\u003eHighs: \u003c\/b\u003eSweet and refined, never aggressive. The extreme high end is airy and well-integrated, with a fine grain that encourages extended listening.\u003c\/p\u003e\n\u003cp class=\"p4\"\u003e\u003cb\u003eDynamics: \u003c\/b\u003eHomogeneous and progressive. Transient response is natural, with well-defined microdynamics and no harshness.\u003c\/p\u003e\n\u003cp class=\"p4\"\u003e\u003cb\u003eSoundstage: \u003c\/b\u003eWide and stable, with good depth and proper separation of sound planes. The sextet contributes to a consistent and well-focused sound image.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003e🎧 Use in Hi-Fi Amplifiers\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eIdeal for multi-channel preamplifiers, complex line stages, vintage equipment, and projects requiring \u003cspan class=\"s1\"\u003e\u003cb\u003emultiple matched 12AU7s\u003c\/b\u003e\u003c\/span\u003e. The sextet selection ensures tonal balance and operational stability over time.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003e🎸 Use in Musical Applications\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eAlso suitable for musical and studio circuits where \u003cspan class=\"s1\"\u003e\u003cb\u003equietness, reliability, and consistency\u003c\/b\u003e\u003c\/span\u003e among multiple tubes are required, with a warm and controlled sound.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e🎯 Note for Audiophiles and Technicians\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli class=\"p1\"\u003e\n\n\u003cspan class=\"s1\"\u003ean \u003c\/span\u003e\u003cb\u003eAmerican production from the early 1960s\u003c\/b\u003e\u003cspan class=\"s1\"\u003e (1961),\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003ea classic construction with \u003cspan class=\"s1\"\u003e\u003cb\u003elong gray plates and halo getter\u003c\/b\u003e\u003c\/span\u003e,\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\n\n\u003cb\u003elow noise \u0026amp; low microphonics\u003c\/b\u003e\u003cspan class=\"s1\"\u003e,\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\n\n\u003cspan class=\"s1\"\u003ea selection designed for \u003c\/span\u003e\u003cb\u003ehigh-level applications\u003c\/b\u003e\u003cspan class=\"s1\"\u003e.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p4\"\u003e\u003cspan class=\"s3\"\u003eA rare and fascinating sextet, intended for those who desire \u003c\/span\u003e\u003cb\u003enot just tubes, but a coherent and historically authentic sound experience\u003c\/b\u003e\u003cspan class=\"s3\"\u003e, in line with the \u003c\/span\u003e\u003cb\u003eVacuum Tubes Treasures\u003c\/b\u003e\u003cspan class=\"s3\"\u003e philosophy.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTube tested on AMPLITREX AT-1000 Tube Tester:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e Va = 250V, Vg = -8.5V\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eAverage 100%:\u003c\/strong\u003e Gm = 2200 ; Ia = 10.5 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eTest Result:\u003c\/strong\u003e VERY STRONG\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTube 1:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2300 ; Ia = 9.4 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2300 ; Ia = 9.8 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTube 2:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2300 ; Ia = 10.0 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2300 ; Ia = 9.6 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTube 3:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2300 ; Ia = 10.3 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2400 ; Ia = 10.4 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTube 4:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2300 ; Ia = 9.4 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2300 ; Ia = 9.4 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTube 5:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2300 ; Ia = 10.0 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2400 ; Ia = 10.4 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTube 6:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2300 ; Ia = 9.8 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2390 ; Ia = 10.2 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Low – Tested and suitable for use in hi-fi systems and guitar amplifiers.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eEmission Quality:\u003c\/strong\u003e Excellent – Very strong and stable emission, without fluctuations.\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eShorts and GAS:\u003c\/strong\u003e Absent.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCondition:\u003c\/strong\u003e NOS - New Old Stock - Tested and fully functional. Supplied in our custom box for optimal protection.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eFunctionality:\u003c\/strong\u003e Fully operational.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCosmetic Condition:\u003c\/strong\u003e Excellent – Markings very well preserved, minimal signs of age. See photos for details.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eManufacturing Code: \u003c\/strong\u003e312 139 → 312 indicates the manufacturer, Sylvania Electric Products Inc., Emporium, Pa. - 139 → 1 ( three digits ) → 1961 - 39 → 39th week of the year\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"Why our tubes are different – the VTT protocol that improves sound, reliability, and durability\" href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" target=\"_blank\"\u003e\u003cstrong\u003eDiscover why our tubes are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":55359493275996,"sku":"03079U","price":129.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_e2464a39-3165-4d69-a88c-85ad6dafaf88.jpg?v=1756550799","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/12au7a-ecc82-nos-sylvania-long-gray-plates-halo-getter-matched-sextet-tubes-usa-1953","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}