{"product_id":"12au7-ecc82-nos-amperex-matched-pair-orange-globe-heerlen-1960-short-gray-plates-halo-getter-balanced-amplitrex-tested","title":"12AU7 \/ ECC82 NOS AMPEREX Matched Pair - Orange Globe Heerlen 1960 - Short Gray Plates - Balanced - Amplitrex Tested - Same Data Codes","description":"\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003e12AU7 \/ ECC82 NOS AMPEREX Matched Pair - Orange Globe Heerlen 1960 - Short Gray Plates - Halo Getter - Balanced - MADE IN HOLLAND \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eAmplitrex Tested - Same Data Codes\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: left;\"\u003e\n\u003cstrong\u003eGeneral Description:\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThis \u003cspan class=\"s1\"\u003e\u003cb\u003epair of 12AU7 \/ ECC82 Amperex Orange Globe\u003c\/b\u003e\u003c\/span\u003e, produced in the historic \u003cspan class=\"s1\"\u003e\u003cb\u003eHeerlen (Netherlands) factory in the 1960s\u003c\/b\u003e\u003c\/span\u003e, represents one of the most recognizable and appreciated expressions of the European school.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe combination of the \u003cspan class=\"s1\"\u003e\u003cb\u003eAmperex brand\u003c\/b\u003e\u003c\/span\u003e, Heerlen construction, and iconic \u003cspan class=\"s1\"\u003e\u003cb\u003eOrange Globe\u003c\/b\u003e\u003c\/span\u003e graphics gives these tubes a precise identity: tonal sophistication, balance, and natural musicality.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe pair is offered as a \u003cspan class=\"s1\"\u003e\u003cb\u003ematched pair with the same manufacturing codes (Gf8 Δ0A3)\u003c\/b\u003e\u003c\/span\u003e, an element of great value for constructive consistency and operational uniformity.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eKey construction features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eShort Gray Plates\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eHalo Getter\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cspan class=\"s1\"\u003eHeerlen production \u003c\/span\u003e\u003cb\u003e– Made in Holland\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e19\u003cspan class=\"s1\"\u003e\u003cb\u003e60s\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"p1\"\u003ehigh-level European construction quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eTested with \u003cspan class=\"s1\"\u003e\u003cb\u003eAmplitrex AT-1000\u003c\/b\u003e\u003c\/span\u003e, they achieved:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eInternal VTT Classification: VERY STRONG\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eVery strong and stable emission\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eAbsence of shorts and GAS\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eExcellent balance between sections\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eA pair that stands out for consistency, reliability, and sound quality, perfectly in line with the expectations of Amperex Heerlen enthusiasts.\u003c\/p\u003e\n\u003ch3 style=\"text-align: left;\"\u003e\u003cstrong\u003eSound Characteristics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eBass\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eControlled and elegant, with a balanced presence that prioritizes precision and articulation over emphasis.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMids\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe true strength: natural, fluid, and rich in nuances. Voices emerge with realism and consistency, without artifice.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHighs\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eOpen and refined, never aggressive. They offer detail and air while always maintaining a soft texture.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDynamics\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eBalanced and progressive, with a response that favors musicality and naturalness rather than forced impact.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSoundstage\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eWell-organized, with a credible scene and good instrument separation.\u003c\/p\u003e\n\u003ch3 style=\"text-align: left;\"\u003e\u003cb\u003e🎧 Use in Hi-Fi Amplifiers\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eThis pair fits perfectly into high-level hi-fi systems where one seeks:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003etonal balance\u003c\/li\u003e\n\u003cli class=\"p1\"\u003etimbral naturalness\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eabsence of listening fatigue\u003c\/li\u003e\n\u003cli class=\"p1\"\u003econsistency between registers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eParticularly suitable for preamplifiers and driver stages where the quality of the 12AU7 significantly impacts the final result.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e🎸 Use in Musical Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p1\"\u003eIn musical contexts, these Amperex offer:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003efluid and controlled response\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eexcellent dynamic management\u003c\/li\u003e\n\u003cli class=\"p1\"\u003emusical and never aggressive sound character\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eIdeal for those seeking definition and musicality without rigidity.\u003c\/p\u003e\n\u003ch3 style=\"text-align: left;\"\u003e\u003cstrong\u003e🎯 Note for audiophiles and technicians\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eAmperex Orange Globe – Heerlen (Holland)\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003e1960s – benchmark European production\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eMatched Pair – Same Data Codes Gf8 Δ0A3\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eShort Gray Plates – Halo Getter\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eAmplitrex Test – VERY STRONG\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eStable emission – No GAS or shorts\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\u003cb\u003eExcellent balance between sections\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eA pair that fully embodies the \u003cspan class=\"s1\"\u003e\u003cb\u003e1960s Amperex Heerlen\u003c\/b\u003e\u003c\/span\u003e character:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p2\"\u003e\u003cb\u003erefined, musical, and credible\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p2\"\u003e\u003cb\u003ecarefully selected and verified\u003c\/b\u003e\u003c\/li\u003e\n\u003cli class=\"p2\"\u003e\u003cb\u003ecapable of concretely elevating listening quality\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3 style=\"text-align: left;\"\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eTube tested on AMPLITREX AT-1000 Tube Tester:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e Va = 250V, Vg = -8.5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage 100%:\u003c\/strong\u003e Gm = 2200; Ia = 10.5 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest Result:\u003c\/strong\u003e VERY STRONG\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eTube 1:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2170; Ia = 10.4 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2100; Ia = 10.2 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eTube 2:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2000; Ia = 10.2 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2070; Ia = 11.4 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicrophony:\u003c\/strong\u003e Low. Tested and suitable for hi-fi use, including phono stages and guitar amplifiers. Also suitable for V1.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission Quality:\u003c\/strong\u003e Excellent – Very strong and stable emission, without fluctuations.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShorts and GAS:\u003c\/strong\u003e Absent.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3 style=\"text-align: left;\"\u003e\u003cstrong\u003eConditions:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConditions:\u003c\/strong\u003e NOS - New Old Stock - Tested and working - Supplied in our custom box for optimal protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunctionality:\u003c\/strong\u003e Perfectly operational.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCosmetic Conditions:\u003c\/strong\u003e Very Good – Legible lettering with slight signs of age, no obvious defects. See photos for details.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e Gf8 Δ0A3 - \u003cmeta charset=\"utf-8\"\u003e Gfx indicates an ECC82 with sequential progression of x, where the increment of x indicates manufacturing changes - \u003cmeta charset=\"utf-8\"\u003e Δ0A3 Δ → Heerlen (Netherlands), 0 (out of four digits) → 1960 - A → January - 3 → 3rd week of the month\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"Perché le nostre valvole sono diverse – il protocollo VTT che migliora suono, affidabilità e durata\" href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" target=\"_blank\"\u003e\u003cstrong\u003eDiscover why our tubes are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"AMPEREX","offers":[{"title":"Default Title","offer_id":57364871610716,"sku":"03532","price":179.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/2_c658f76d-fba0-446f-b726-83a00d8b0cc9.jpg?v=1776260333","url":"https:\/\/vacuumtubestreasures.com\/en-ie\/products\/12au7-ecc82-nos-amperex-matched-pair-orange-globe-heerlen-1960-short-gray-plates-halo-getter-balanced-amplitrex-tested","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}