{"product_id":"12au7-ecc82-raytheon-long-black-plates-square-getter-tested-tube-made-in-usa-57","title":"12AU7 ECC82 RAYTHEON Long Black Plates Square Getter Tested Tube Made in USA '57","description":"\u003cp\u003e \u003cstrong\u003e12AU7 ( ECC82 ) RAYTHEON Long Black Plates Square Getter Tested Tube Made in USA '57\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003e \u003cstrong\u003eDescription:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p1\"\u003e The \u003cspan class=\"s1\"\u003e\u003cb\u003e12AU7\/ECC82 RAYTHEON\u003c\/b\u003e\u003c\/span\u003e with \u003cspan class=\"s1\"\u003e\u003cb\u003elong black plates\u003c\/b\u003e\u003c\/span\u003e and \u003cspan class=\"s1\"\u003e\u003cb\u003esquare getter\u003c\/b\u003e\u003c\/span\u003e , produced in the United States in \u003cspan class=\"s1\"\u003e\u003cb\u003e1957\u003c\/b\u003e\u003c\/span\u003e , is one of the most refined and sought-after versions of this medium-gain double triode. The \u003cspan class=\"s1\"\u003e\u003cb\u003elong black plate\u003c\/b\u003e\u003c\/span\u003e construction is typical of the best American production of the late 1950s and gives this tube a solid, deep and particularly musical sonic personality.\u003c\/p\u003e\n\n \u003cp class=\"p1\"\u003eThe unit has been carefully tested in our laboratory and passed the tests with a \u003cspan class=\"s1\"\u003e\u003cb\u003eVERY STRONG\u003c\/b\u003e\u003c\/span\u003e result, demonstrating excellent electrical performance. The tube is also \u003cspan class=\"s1\"\u003e\u003cb\u003ebalanced\u003c\/b\u003e\u003c\/span\u003e , with \u003cspan class=\"s1\"\u003e\u003cb\u003every low noise and microphonics\u003c\/b\u003e\u003c\/span\u003e , making it suitable even for sensitive circuit positions.\u003c\/p\u003e\n\n\u003ch3\u003e \u003cstrong\u003eSound Characteristics\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p4\"\u003e \u003cb\u003eBass:\u003c\/b\u003e Full-bodied, full, and well-articulated. The bass is authoritative yet controlled, with a sense of depth that gives solidity to the entire range.\u003c\/p\u003e\n\n\u003cp class=\"p4\"\u003e \u003cb\u003eMids:\u003c\/b\u003e This Raytheon's strong point. The mids are dense, natural, and nuanced, with vocals rendered with exceptional credibility and substance.\u003c\/p\u003e\n\n\u003cp class=\"p4\"\u003e \u003cb\u003eHighs:\u003c\/b\u003e Smooth and well-integrated, never aggressive. The highs are present but well-mannered, allowing for extended listening without fatigue.\u003c\/p\u003e\n\n \u003cp class=\"p4\"\u003e\u003cb\u003eDynamics:\u003c\/b\u003e Smooth and composed. Transient response is natural, with a smooth progression that prioritizes musicality over artificial impact.\u003c\/p\u003e\n\n\u003cp class=\"p4\"\u003e \u003cb\u003eSoundstage:\u003c\/b\u003e Stable and well-proportioned soundstage, with excellent instrument separation and precise focus.\u003c\/p\u003e\n\n\u003ch3\u003e \u003cb\u003e🎧 Use in Hi-Fi Amplifiers\u003c\/b\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p1\"\u003e Ideal as a line valve, driver, or preamp stage in high-quality hi-fi amplifiers and preamps. Its low noise and good balance also make it suitable for high-resolution systems.\u003c\/p\u003e\n\n\u003ch3\u003e \u003cstrong\u003e🎸 Use in Music Applications\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p1\"\u003e Also appreciated in the musical field for its warm and controlled character, perfect where a balanced response and a rich harmonic output are desired.\u003c\/p\u003e\n\n\u003ch3\u003e \u003cstrong\u003e🎯 Note for audiophiles and technicians\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli class=\"p1\"\u003e produced in the USA in 1957,\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\n\n \u003cb\u003eVERY STRONG\u003c\/b\u003e \u003cspan class=\"s1\"\u003eheader\u003c\/span\u003e \u003cspan class=\"s1\"\u003e,\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\n\n \u003cb\u003ebalanced\u003c\/b\u003e \u003cspan class=\"s1\"\u003e,\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e \n\u003cspan class=\"s1\"\u003ewith\u003c\/span\u003e \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 selected for higher-level applications.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp class=\"p1\"\u003e A tube that best expresses the classic American Raytheon character, designed for those seeking \u003cspan class=\"s1\"\u003e\u003cb\u003emusicality, reliability and an authoritative timbre\u003c\/b\u003e\u003c\/span\u003e , in full \u003cspan class=\"s1\"\u003e\u003cb\u003eVacuum Tubes Treasures\u003c\/b\u003e\u003c\/span\u003e style.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e \u003cstrong\u003eTest Results:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp\u003e Valve tested on \u003cstrong\u003eAMPLITREX AT-1000\u003c\/strong\u003e Tube Tester:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eTest Conditions:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eVa = 250V, Vg = -8.5V\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eAverage 100%:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 2200 ; Ia = 10.5 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eTest Result:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eVERY STRONG\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1900 ; Ia = 8.8 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1900 ; Ia = 8.4 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e \n\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e \u003cspan\u003eLow. Tested and approved for use in hi-fi, including phono stages and guitar amplifiers. Also suitable for V1.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eBalance:\u003c\/strong\u003e The sections are coherent and well aligned, making the valve also suitable for use as a phase inverter in hi-fi and instrumental applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eFunctionality:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFully operational.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eOutput Quality:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eExcellent – ​​Very strong and stable output, no fluctuations.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAbsent.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e \u003cstrong\u003eConditions:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eCondition:\u003c\/strong\u003e \u003cspan\u003eVintage tubes - Tested and in perfect working order. Shipped in our custom box for optimal protection.\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eCosmetic condition:\u003c\/strong\u003e Excellent – ​​Excellently preserved lettering, minimal signs of wear. See photos for details.\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e 280 57-51 → 280 indicates the manufacturer, i.e., Raytheon Mfg. Company, Newton 58, Mass. - 57-51 → RMA\/EIA Open Date Code → manufactured week 51, 1957\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003ca href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" title=\"Why our tubes are different – ​​the VTT protocol that improves sound, reliability and durability\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eFind out why our valves are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"RAYTHEON","offers":[{"title":"Default Title","offer_id":56585353625948,"sku":"01548","price":92000.0,"currency_code":"KRW","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_844077e5-7022-4e2d-9bc0-6c457cbb0385.jpg?v=1769608624","url":"https:\/\/vacuumtubestreasures.com\/en-kr\/products\/12au7-ecc82-raytheon-long-black-plates-square-getter-tested-tube-made-in-usa-57","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}