{"product_id":"12au7-ecc82-nos-sylvania-3-mica-gray-plate-square-getter-amplitrex-tested-tube","title":"12AU7 \/ ECC82 NOS NIB SYLVANIA 3 Mica Short Gray Plates Square Getter AMPLITREX Tested Tube","description":"\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e\u003cmeta charset=\"utf-8\"\u003e12AU7 \/ ECC82 NOS NIB SYLVANIA 3 Mica Short Gray Plates Square Getter AMPLITREX Tested Tube – Made in USA\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p2\"\u003e\u003cb\u003eAMPLITREX Tested – VERY STRONG – Low Noise \u0026amp; Microphonics – Vintage American Sylvania Production\u003c\/b\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eTest Results\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p2\"\u003eTubes tested on\u003cspan class=\"s3\"\u003e \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eAMPLITREX AT-1000 Tube Tester\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003eTest Conditions:\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eVa = 250V, Vg = -8.5V\u003cbr\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eAverage 100%:\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eGm = 2200 ; Ia = 10.5 mA\u003cbr\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eTest Result:\u003c\/b\u003e\u003c\/span\u003e VERY STRONG\u003c\/p\u003e\n\u003cdiv\u003e\u003cstrong\u003eTube:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003e Section 1:\u003c\/strong\u003e Gm = 2000 ; Ia = 9.0 mA\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003e Section 2:\u003c\/strong\u003e Gm = 2100 ; Ia = \u003cmeta charset=\"utf-8\"\u003e9.4 mA\u003c\/span\u003e\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\n\u003c\/div\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eAdditional Tests Performed\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli class=\"p2\"\u003e\n\n\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003eBurn-in \/ Stability Test:\u003c\/strong\u003e -\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eMicrophonics:\u003c\/b\u003e Low. Tested and suitable for use in hi-fi, including phono stages and guitar amplifiers. Also suitable for V1.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cstrong\u003eNoise:\u003c\/strong\u003e Low\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eBalance:\u003c\/b\u003e Sections are consistent and well-aligned, making the tubes suitable for use as phase inverters in hi-fi and instrumental applications.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eEmission Quality:\u003c\/b\u003e Excellent – Very strong and stable emission, without fluctuations.\u003c\/li\u003e\n\n\u003cli class=\"p2\"\u003e\n\n\u003cb\u003eShorts and GAS:\u003c\/b\u003e\u003cspan class=\"s2\"\u003e Absent.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3 class=\"p2\"\u003e\u003cb\u003eDescription:\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eValuable \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12AU7 \/ ECC82 NOS NIB Sylvania\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, made in the USA and featuring the sought-after \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3 Mica, Gray Plates and Square Getter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e construction. This is a particularly interesting vintage configuration from American Sylvania production, made with a robust and accurate internal structure, which is increasingly difficult to find today in authentic \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNew Old Stock\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e condition.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis example belongs to the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSylvania Export Quality\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e production, intended for international markets and approximately traceable to the late 1950s \/ early 1960s, one of the most appreciated periods of American tube production.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe tube has been carefully tested in our laboratory using an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAmplitrex AT-1000 Tube Tester\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, achieving a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVERY STRONG\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e classification. Both sections are well balanced and the tube has been selected for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLow Noise \u0026amp; Microphonics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, a quality that makes it particularly interesting for even the most sensitive audio stages.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSonically, Sylvania tubes from this period are appreciated for an open, natural, and well-defined reproduction, with controlled bass, transparent and musical mids, detailed but never aggressive high frequencies, and a wide and orderly soundstage. The \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3 mica\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e construction also contributes to the mechanical solidity of the assembly, which is particularly valuable in applications where stability and reduced microphonics are important.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIdeal for hi-fi preamplifiers, compatible phono stages, driver stages, phase inverters, tube DACs, headphone amplifiers, and guitar amplifiers. Thanks to the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLow Noise \u0026amp; Microphonics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e selection, it can also be used in the most sensitive positions, including \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eV1\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e in compatible applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe tube is \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNOS NIB – New Old Stock, New In Box\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, carefully tested and fully functional. It is supplied in its \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eoriginal Sylvania box\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, which has the bottom flap missing. The aesthetic condition of the tube is appropriate for its age, with partially faded but still identifiable silkscreen printing.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAn interesting and uncommon \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSylvania 12AU7 \/ ECC82 3 Mica Square Getter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, truly tested and selected by \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVacuum Tubes Treasures\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, ideal for those seeking vintage American build quality, strong emission, and a selection suitable for even the most demanding audio applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eConditions\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eConditions:\u003c\/b\u003e NOS - NIB - New Old Stock, New In Box - Tested and functional - Supplied in Original box. (the bottom flip of the box is missing)\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eFunctionality:\u003c\/b\u003e Fully operational.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eAesthetic conditions:\u003c\/b\u003e Adequate – Partially faded or barely legible lettering, overall aesthetic with clear signs of age. See photos for details.\u003c\/li\u003e\n\n\u003cli class=\"p2\"\u003e\n\n\u003cb\u003eManufacturing Code: \u003c\/b\u003eSYLVANIA Export Quality. Production approximately attributable to the late 1950s \/ early 1960s.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan class=\"s2\"\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\u003eDiscover why our tubes are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":58842272366940,"sku":"01493X","price":64.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/s-l1600_2.webp?v=1787840801","url":"https:\/\/vacuumtubestreasures.com\/en-ee\/products\/12au7-ecc82-nos-sylvania-3-mica-gray-plate-square-getter-amplitrex-tested-tube","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}