{"product_id":"jg-12at7-ecc81-ge-matched-pair-gray-wing-plates-square-tilt-getter-made-in-usa-55","title":"JG-12AT7 \/ ECC81 GE Matched Pair Gray Wing Plates Square Tilt Getter Made in USA '55","description":"\u003cp\u003e\u003cstrong\u003eJG-12AT7 \/ ECC81 GE Matched Pair Gray Wing Plates Square Tilt Getter Made in USA '55\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"0\" data-end=\"655\"\u003eThis \u003cstrong data-start=\"37\" data-end=\"92\"\u003ematched pair of General Electric JG-12AT7 \/ ECC81\u003c\/strong\u003e , \u003cstrong data-start=\"105\" data-end=\"125\"\u003eMade in USA 1955\u003c\/strong\u003e , belongs to the \u003cstrong data-start=\"149\" data-end=\"173\"\u003eJG (Joint Army–Navy)\u003c\/strong\u003e series, built to extremely stringent military specifications. The construction with \u003cstrong data-start=\"256\" data-end=\"276\"\u003egray wing plates\u003c\/strong\u003e and \u003cstrong data-start=\"279\" data-end=\"301\"\u003esquare tilt getter\u003c\/strong\u003e identifies one of the most solid and reliable variants of the 1950s GE 12AT7, today particularly sought after for its stability and balanced sound reproduction. \u003cbr data-start=\"452\" data-end=\"455\"\u003eThe tubes are \u003cstrong data-start=\"471\" data-end=\"488\"\u003eTested STRONG\u003c\/strong\u003e and selected as a \u003cstrong data-start=\"508\" data-end=\"524\"\u003eMatched Pair\u003c\/strong\u003e , offering consistent behavior and an immediate feeling of quality and robustness typical of American military production.\u003c\/p\u003e\n\u003cp data-start=\"657\" data-end=\"685\"\u003e\u003cstrong data-start=\"659\" data-end=\"685\"\u003eSound Characteristics\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"687\" data-end=\"859\"\u003e\u003cstrong data-start=\"687\" data-end=\"696\"\u003eBass\u003c\/strong\u003e\u003cbr data-start=\"696\" data-end=\"699\"\u003eTight, controlled, and well-articulated. The low range is precise and organized, with an excellent ability to maintain rhythm and structure even in the most complex passages.\u003c\/p\u003e\n\u003cp data-start=\"861\" data-end=\"1036\"\u003e\u003cstrong data-start=\"861\" data-end=\"869\"\u003eMedium\u003c\/strong\u003e\u003cbr data-start=\"869\" data-end=\"872\"\u003eClean, natural, and well-defined. Voices are centered and clear, with a very balanced reproduction that enhances acoustic instruments and well-recorded sound.\u003c\/p\u003e\n\u003cp data-start=\"1038\" data-end=\"1193\"\u003e\u003cstrong data-start=\"1038\" data-end=\"1046\"\u003eHigh\u003c\/strong\u003e\u003cbr data-start=\"1046\" data-end=\"1049\"\u003eClear, open, and uncluttered. The highs are bright but never aggressive, with an elegant definition that adds air and detail without being overwhelming.\u003c\/p\u003e\n\u003cp data-start=\"1195\" data-end=\"1331\"\u003e\u003cstrong data-start=\"1195\" data-end=\"1207\"\u003eDynamics\u003c\/strong\u003e\u003cbr data-start=\"1207\" data-end=\"1210\"\u003ePrompt and controlled. The response is reactive and stable, with fluid microdynamics that make the music lively and coherent.\u003c\/p\u003e\n\u003cp data-start=\"1333\" data-end=\"1474\"\u003e\u003cstrong data-start=\"1333\" data-end=\"1347\"\u003eSoundstage\u003c\/strong\u003e\u003cbr data-start=\"1347\" data-end=\"1350\"\u003eStable and well-focused. Good instrument separation and a clear image, with a solid and realistic presentation.\u003c\/p\u003e\n\u003cp data-start=\"1476\" data-end=\"1532\"\u003e🎧 \u003cstrong data-start=\"1479\" data-end=\"1516\"\u003eUse in Hi-Fi Stereo Amplifiers\u003c\/strong\u003e\u003cbr data-start=\"1516\" data-end=\"1519\"\u003eIdeal for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1535\" data-end=\"1571\"\u003epreamplifiers and line stages,\u003c\/li\u003e\n\u003cli data-start=\"1574\" data-end=\"1609\"\u003edrivers and medium gain stages,\u003c\/li\u003e\n\u003cli data-start=\"1612\" data-end=\"1672\"\u003evintage and modern hi-fi amplifiers using ECC81.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1674\" data-end=\"1761\"\u003eThe JG military selection guarantees reliability and consistency of behavior over time.\u003c\/p\u003e\n\u003cp data-start=\"1763\" data-end=\"1815\"\u003e🎸 \u003cstrong data-start=\"1766\" data-end=\"1799\"\u003eUse in Music Amplifiers\u003c\/strong\u003e\u003cbr data-start=\"1799\" data-end=\"1802\"\u003eExcellent for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1818\" data-end=\"1859\"\u003eguitar amplifiers and instruments,\u003c\/li\u003e\n\u003cli data-start=\"1862\" data-end=\"1892\"\u003edriver positions\u003c\/li\u003e\n\u003cli data-start=\"1895\" data-end=\"1961\"\u003ecircuits that require rapid response and signal control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1963\" data-end=\"2036\"\u003eThey offer definition, stability and a clean, authoritative sound character.\u003c\/p\u003e\n\u003cp data-start=\"2038\" data-end=\"2181\"\u003e🎯 \u003cstrong data-start=\"2041\" data-end=\"2073\"\u003eNote for audiophiles and technicians\u003c\/strong\u003e \u003cbr data-start=\"2073\" data-end=\"2076\"\u003e\u003c\/p\u003e\n\u003cp data-start=\"2393\" data-end=\"2584\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eAn ideal pair for those looking for \u003cstrong data-start=\"2425\" data-end=\"2478\"\u003ea solid, precise and musically coherent ECC81\u003c\/strong\u003e , capable of enhancing hi-fi systems and musical amplifiers with the classic GE rigour of the golden years.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eValves tested on \u003cstrong\u003eAMPLITREX AT-1000\u003c\/strong\u003e Tube Tester:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e \u003cspan\u003eVa = 250V ; Vg = -2V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAverage 100%:\u003c\/strong\u003e \u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003eGm = 5.5 ; Ia = 10 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTest Result:\u003c\/strong\u003e STRONG\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eValve 1:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003cspan\u003e\u0026nbsp;\u003c\/span\u003eGm = 4.6, ; Ia = 8.2 mA\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e\u0026nbsp;\u003c\/span\u003eGm = 4.7 ; Ia = 7.8 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eValve 2:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003cspan\u003e\u0026nbsp;\u003c\/span\u003eGm = 4.6 ; Ia = 8.8 mA\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e\u0026nbsp;\u003c\/span\u003eGm = 4.7 ; Ia = 7.6 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\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\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Excellent – Very strong and stable output, no fluctuations.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e Absent.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eConditions:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Vintage tubes - Tested and in perfect working order. Shipped in our custom box for optimal protection.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFunctionality:\u003c\/strong\u003e Fully functional.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCosmetic condition:\u003c\/strong\u003e Good – Lettering partially eroded, but still legible. Valve body in good condition. See photos for details.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e None. Year of manufacture detected by the internal structure - Manufactured in the 1960s\u003c\/li\u003e\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\u003eFind out why our valves are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"GE","offers":[{"title":"Default Title","offer_id":56453365891420,"sku":"03354","price":64.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_1f61b8bf-24d9-4515-94ba-718474f4d1a5.jpg?v=1768313698","url":"https:\/\/vacuumtubestreasures.com\/en-sk\/products\/jg-12at7-ecc81-ge-matched-pair-gray-wing-plates-square-tilt-getter-made-in-usa-55","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}