{"product_id":"12au7a-ecc82-lowray-by-rca-clear-top-1959-nos-matched-pair-long-gray-plates-amplitrex-tested","title":"12AU7A \/ ECC82 Lowray by RCA Clear Top 1959 - NOS Matched Pair - Long Gray Plates - Amplitrex Tested","description":"\u003cp class=\"p1\"\u003e \u003cb\u003e12AU7A \/ ECC82 LOWRAY by RCA – Clear Top – 1959 – NOS Matched Pair – Long Gray Plates – Amplitrex Tested – Low Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/p\u003e\n\n\u003ch3 style=\"text-align: left;\"\u003e \u003cstrong\u003eDescription:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p1\"\u003e This \u003cspan class=\"s1\"\u003e\u003cb\u003ematched pair of 12AU7A \/ ECC82 LOWRAY by RCA\u003c\/b\u003e\u003c\/span\u003e , produced in the United States in \u003cspan class=\"s1\"\u003e\u003cb\u003e1959\u003c\/b\u003e\u003c\/span\u003e , belongs to the famous \u003cspan class=\"s1\"\u003e\u003cb\u003eClear Top\u003c\/b\u003e\u003c\/span\u003e series by RCA, recognizable by the transparent top without upper flash getter.\u003c\/p\u003e\n\n\u003cp class=\"p1\"\u003e The construction with \u003cspan class=\"s1\"\u003e\u003cb\u003elong gray plates\u003c\/b\u003e\u003c\/span\u003e and a lateral getter is typical of RCA production in the late 1950s, known for its reliability, stability, and balanced tonal balance. The \u003cspan class=\"s1\"\u003e\u003cb\u003eLowray\u003c\/b\u003e\u003c\/span\u003e branding identifies a select supply for professional and instrumental applications.\u003c\/p\u003e\n\n \u003cp class=\"p1\"\u003eThe tubes are \u003cspan class=\"s1\"\u003e\u003cb\u003eauthentic NOS\u003c\/b\u003e\u003c\/span\u003e , selected as \u003cspan class=\"s1\"\u003e\u003cb\u003eMatched Pair\u003c\/b\u003e\u003c\/span\u003e , \u003cspan class=\"s1\"\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/span\u003e rated and tested in our laboratory on \u003cspan class=\"s1\"\u003e\u003cb\u003eAmplitrex AT-1000\u003c\/b\u003e\u003c\/span\u003e , ready for quality hi-fi and music applications.\u003c\/p\u003e\n\n\u003ch3 style=\"text-align: left;\"\u003e \u003cstrong\u003eSound Characteristics\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p1\"\u003e \u003cb\u003eBass:\u003c\/b\u003e Precise, dry, and well-controlled. The low range is linear and defined, with good articulation and excellent rhythm control.\u003c\/p\u003e\n\n\u003cp class=\"p1\"\u003e \u003cb\u003eMids:\u003c\/b\u003e Clear and natural. Vocals are well-focused and believable, with a clean and coherent harmonic texture.\u003c\/p\u003e\n\n\u003cp class=\"p1\"\u003e \u003cb\u003eHighs:\u003c\/b\u003e Open and airy. The top end is bright yet composed, with good extension and fine grain, typical of RCA Clear Tops.\u003c\/p\u003e\n\n\u003cp class=\"p1\"\u003e \u003cb\u003eDynamics:\u003c\/b\u003e Lively and stable. Excellent microdynamics and prompt transient response, with consistent and predictable behavior.\u003c\/p\u003e\n\n \u003cp class=\"p1\"\u003e\u003cb\u003eSoundstage:\u003c\/b\u003e Wide and well-organized soundstage, with good separation of planes and a well-defined central image.\u003c\/p\u003e\n\n\u003ch3 style=\"text-align: left;\"\u003e \u003cb\u003e🎧 Use in Hi-Fi Amplifiers\u003c\/b\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p1\"\u003e Ideal for:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli class=\"p1\"\u003e line preamplifiers\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e driver stages\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e amplifiers that require clarity and precision\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp class=\"p1\"\u003e Particularly suitable for systems oriented towards transparency and control.\u003c\/p\u003e\n\n\u003ch3 style=\"text-align: left;\"\u003e \u003cb\u003e🎸 Use in Music Applications\u003c\/b\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p1\"\u003e Also very valid in:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli class=\"p1\"\u003e instrument amplifiers\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e sensitive positions thanks to the \u003cspan class=\"s1\"\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/span\u003e classification\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp class=\"p1\"\u003e They offer defined response, good articulation and stable behavior over time.\u003c\/p\u003e\n\n\u003ch3 style=\"text-align: left;\"\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\n\n RCA \u003cspan class=\"s1\"\u003eProduction\u003c\/span\u003e \u003cb\u003e– Made in USA – 1959\u003c\/b\u003e\n\n\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e \u003cspan class=\"s1\"\u003e\u003cb\u003eClear Top\u003c\/b\u003e\u003c\/span\u003e Version\n\n\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e \u003cspan class=\"s1\"\u003e\u003cb\u003eLowray\u003c\/b\u003e\u003c\/span\u003e brand (select supply)\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e Long Gray Plates\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e NOS – New Old Stock\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e Matched Pair selected\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\n\n \u003cspan class=\"s1\"\u003eTested on\u003c\/span\u003e \u003cb\u003eAmplitrex AT-1000\u003c\/b\u003e\n\n\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e \u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003cp class=\"p3\"\u003eA classic pair of American RCA production from the late 1950s, appreciated for their clarity, balance and reliability, in the true Vacuum Tubes Treasures style.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"text-align: left;\"\u003e \u003cstrong\u003eTest Results:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp style=\"text-align: left;\"\u003e \u003cstrong\u003eValve tested on AMPLITREX AT-1000 Tube Tester:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul style=\"text-align: left;\"\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\n\u003cp style=\"text-align: left;\"\u003e \u003cstrong\u003eValve #1:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul style=\"text-align: left;\"\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2100 ; Ia = 10.0 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2120 ; Ia = 10.2 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp style=\"text-align: left;\"\u003e \u003cstrong\u003eValve #2:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul style=\"text-align: left;\"\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2000 ; Ia = 9.0 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2200 ; Ia = 10.2 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp style=\"text-align: left;\"\u003e \u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cul style=\"text-align: left;\"\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Low. Tested and approved for use in hi-fi, including phono stages and guitar amplifiers. Also suitable for V1.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Excellent – ​​Very strong and stable output, no fluctuations.\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e Absent.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3 style=\"text-align: left;\"\u003e \u003cstrong\u003eConditions:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cul style=\"text-align: left;\"\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eCondition:\u003c\/strong\u003e NOS - New Old Stock - Tested and in perfect working order. Comes in our custom box for optimal protection.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eFunctionality:\u003c\/strong\u003e Fully functional.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eAesthetic condition:\u003c\/strong\u003e Very good – Clearly legible writing with minor signs of wear, no obvious defects. See photos for details.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp style=\"text-align: left;\"\u003e \u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul style=\"text-align: left;\"\u003e\u003c\/ul\u003e\n\n\u003cp style=\"text-align: left;\"\u003e 59-26 → RMA\/EIA Open Date Code → manufactured week 26 of 1959 -\u003cmeta charset=\"utf-8\"\u003e 274\u003cmeta charset=\"utf-8\"\u003e → Radio Corporation of America, Camden, NJ\u003c\/p\u003e\n\n\u003cp style=\"text-align: left;\"\u003e\u003cmeta charset=\"utf-8\"\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":"RCA","offers":[{"title":"Default Title","offer_id":56888998134108,"sku":"03449","price":99.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/3_0eff7941-c00f-4264-8e27-a327e12f5114.jpg?v=1772551719","url":"https:\/\/vacuumtubestreasures.com\/en-ee\/products\/12au7a-ecc82-lowray-by-rca-clear-top-1959-nos-matched-pair-long-gray-plates-amplitrex-tested","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}