{"product_id":"12au7a-ecc82-baldwin-by-raytheon-amplitrex-tested-tube-long-black-plates-halo-getter-made-in-usa-59","title":"12AU7A \/ ECC82 Baldwin by RAYTHEON AMPLITREX Tested Tube Long Black Plates Halo Getter Made in USA '59","description":"\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e12AU7A \/ ECC82 BALDWIN by RAYTHEON – Long Black Plates – Halo Getter – Made in USA – 1960s\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p2\"\u003e\u003cb\u003eAMPLITREX Tested – STRONG – Low Noise \u0026amp; Microphonics – Vintage American Raytheon 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\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 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 = 1900 ; Ia = 8.4 mA\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003e Section 2:\u003c\/strong\u003e Gm = 1900 ; Ia = \u003cmeta charset=\"utf-8\"\u003e8.8 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 48h – OK\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eMicrophonics:\u003c\/b\u003e Low. Tested and suitable for hi-fi use even in phono stages and guitar amplifiers. Also suitable for V1.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eBalance:\u003c\/b\u003e The sections are consistent and well-matched, 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 Strong – Strong and regular emission, suitable for any application.\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\u003ePrecious \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12AU7A \/ ECC82 Baldwin produced by Raytheon in the United States\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, dating back to approximately the late 1950s. The sought-after \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLong Black Plates\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e construction with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHalo Getter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e identifies one of Raytheon's best productions of the era, which is increasingly difficult to find today.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTubes branded Baldwin were intended for high-quality professional equipment, where reliability, long life, and quiet operation were fundamental requirements. Behind the Baldwin brand lies excellent American Raytheon production, highly valued by audiophiles for its construction and sound qualities.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe tube has been carefully tested and selected in our laboratory using the \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\u003eSTRONG\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e classification. It proved to be \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLow Noise \u0026amp; Microphonics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and features \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ewell-balanced internal sections\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, a particularly valuable characteristic in audio applications where uniformity and operational stability are important.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFrom a sonic perspective, Raytheon Long Black Plate tubes are known for an authoritative and refined reproduction, with deep and well-controlled bass, a rich and natural midrange, open yet always smooth high frequencies, and a wide, stable, and three-dimensional soundstage. They offer engaging musicality and remarkable transparency, while retaining the typical warmth of the best American tubes of the period.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIdeal for hi-fi preamplifiers, driver stages, phase splitters, headphone amplifiers, and all equipment compatible with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12AU7A \/ ECC82\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e where a selected tube with well-balanced internal sections is required.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe tube is \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eused\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, carefully tested, and fully functional. The cosmetic condition is adequate, with partially faded or barely legible labels and obvious signs of age, with no effect on electrical performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAn authentic \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eRaytheon Long Black Plates\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 who desire one of the most appreciated American 12AU7s ever produced.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eCondition\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eCondition:\u003c\/b\u003e Vintage Tube - Tested and fully functional. Supplied in our custom box for optimal protection.\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\u003eCosmetic condition:\u003c\/b\u003e Adequate – Partially faded or barely legible markings, overall appearance with obvious signs of age. See photos for details.\u003c\/li\u003e\n\n\u003cli class=\"p2\"\u003e\n\n\u003cb\u003eManufacturing Code:\u003c\/b\u003e partially decipherable. Production attributed to approximately the late 1950s.\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":"RAYTHEON","offers":[{"title":"Default Title","offer_id":58770900484444,"sku":"03752","price":134.0,"currency_code":"RON","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_a99c4d69-445e-4438-b053-5b98330a4545.jpg?v=1787507504","url":"https:\/\/vacuumtubestreasures.com\/en-ro\/products\/12au7a-ecc82-baldwin-by-raytheon-amplitrex-tested-tube-long-black-plates-halo-getter-made-in-usa-59","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}