{"product_id":"12ax7-ecc83-nos-mullard-blackburn-1958-long-gray-plates-goalpost-getter-matched-pair","title":"12AX7 \/ ECC83 NOS MULLARD Blackburn 1958 – Long Gray Plates Goalpost Getter – Matched Pair","description":"\u003cp\u003e \u003cstrong\u003e12AX7 \/ ECC83 NOS MULLARD – Blackburn (Great Britain) 1958\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eLong Gray Plates – Goalpost \/ Dual Post Getter – Matched Pair\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 This \u003cspan class=\"s1\"\u003e\u003cb\u003ematched pair of NOS MULLARD 12AX7 \/ ECC83s\u003c\/b\u003e\u003c\/span\u003e , produced in the historic \u003cspan class=\"s1\"\u003e\u003cb\u003eBlackburn factory (Great Britain)\u003c\/b\u003e\u003c\/span\u003e in \u003cspan class=\"s1\"\u003e\u003cb\u003e1958\u003c\/b\u003e\u003c\/span\u003e , represents one of the \u003cspan class=\"s1\"\u003e\u003cb\u003erarest, earliest and most sought-after\u003c\/b\u003e\u003c\/span\u003e versions of the entire Mullard production.\u003c\/p\u003e\n\n \u003cp class=\"p1\"\u003eThe construction with \u003cspan class=\"s1\"\u003e\u003cb\u003elong gray plates\u003c\/b\u003e\u003c\/span\u003e and \u003cspan class=\"s1\"\u003e\u003cb\u003egoalpost \/ dual post getter\u003c\/b\u003e\u003c\/span\u003e identifies a \u003cspan class=\"s1\"\u003e\u003cb\u003every early technical configuration\u003c\/b\u003e\u003c\/span\u003e , today particularly appreciated for its construction quality, mechanical stability and sonic refinement. It is a tube that fully embodies the golden age of Mullard, when the absolute priority was musical performance and reliability over time.\u003c\/p\u003e\n\n\u003cp class=\"p1\"\u003e The pair is \u003cspan class=\"s1\"\u003e\u003cb\u003eNOS\u003c\/b\u003e\u003c\/span\u003e , selected as a \u003cspan class=\"s1\"\u003e\u003cb\u003eMatched Pair\u003c\/b\u003e\u003c\/span\u003e , and features \u003cspan class=\"s1\"\u003e\u003cb\u003elow noise and limited microphonics\u003c\/b\u003e\u003c\/span\u003e , making it suitable even for sensitive positions in the circuit.\u003c\/p\u003e\n\n\u003ch3 class=\"p3\"\u003e \u003cstrong\u003eSound Characteristics\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p3\"\u003e \u003cb\u003eBass:\u003c\/b\u003e Deep, rounded, and perfectly controlled. The low end is authoritative yet elegant, with a solid structure that supports the music without weighing it down.\u003c\/p\u003e\n\n \u003cp class=\"p3\"\u003e\u003cb\u003eMids:\u003c\/b\u003e The heart of this version. Rich, textured, and three-dimensional, with extremely natural voicings and a deep harmonic texture, typical of first-generation Mullards.\u003c\/p\u003e\n\n\u003cp class=\"p3\"\u003e \u003cb\u003eHighs:\u003c\/b\u003e Silky, refined, and well-extended. The highs are sweet and never aggressive, with a naturalness that favors long, highly engaging listening sessions.\u003c\/p\u003e\n\n\u003cp class=\"p3\"\u003e \u003cb\u003eDynamics:\u003c\/b\u003e Fluid, expressive, and very natural. Microdynamics are excellent, with a responsive yet composed transient response.\u003c\/p\u003e\n\n\u003cp class=\"p3\"\u003e \u003cb\u003eSoundstage:\u003c\/b\u003e Wide, deep, and beautifully layered. The soundstage is three-dimensional and stable, with realistic instrument placement and excellent separation.\u003c\/p\u003e\n\n\u003ch3\u003e \u003cstrong\u003e\u003cspan class=\"s2\"\u003e🎧\u003c\/span\u003e Use in Hi-Fi Amplifiers\u003c\/strong\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 high-level input and pre-amplification stages,\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e high-end hi-fi preamplifiers and integrated amplifiers,\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\n\n \u003cspan class=\"s1\"\u003esystems that seek\u003c\/span\u003e \u003cb\u003etonal refinement, naturalness and silence\u003c\/b\u003e \u003cspan class=\"s1\"\u003e.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003cp class=\"p1\"\u003eParticularly suitable for jazz, vocal, classical and acoustic music.\u003c\/p\u003e\n\n\u003ch3 class=\"p3\"\u003e \u003cstrong\u003e\u003cspan class=\"s2\"\u003e🎸\u003c\/span\u003e Use in Music Applications\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p1\"\u003e Also excellent in:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli class=\"p1\"\u003e vintage and boutique guitar amplifiers,\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e\n\n \u003cb\u003eV1\u003c\/b\u003e \u003cspan class=\"s1\"\u003eposition\u003c\/span\u003e \u003cspan class=\"s1\"\u003e, thanks to\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\n\u003c\/ul\u003e\n\n\u003cp class=\"p1\"\u003e They offer rich harmonics, great tonal depth and an authentically British character of their origins.\u003c\/p\u003e\n\n\u003ch3 class=\"p3\"\u003e \u003cstrong\u003e\u003cspan class=\"s2\"\u003e🎯\u003c\/span\u003e Note for audiophiles and technicians\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp class=\"p3\"\u003e \u003cspan class=\"s2\"\u003eThis\u003c\/span\u003e \u003cb\u003e12AX7 \/ ECC83 NOS MULLARD Blackburn 1958 – Long Gray Plates – Goalpost \/ Dual Post Getter – Matched Pair\u003c\/b\u003e \u003cspan class=\"s2\"\u003erepresents:\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli class=\"p1\"\u003e\n\n \u003cspan class=\"s1\"\u003ea\u003c\/span\u003e \u003cb\u003every early Mullard production of Blackburn\u003c\/b\u003e \u003cspan class=\"s1\"\u003e,\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e one of the \u003cspan class=\"s1\"\u003e\u003cb\u003erarest and most musically appreciated\u003c\/b\u003e\u003c\/span\u003e configurations,\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e \u003cspan class=\"s1\"\u003e\u003cb\u003eNOS\u003c\/b\u003e\u003c\/span\u003e selection with low noise and contained microphonics,\u003c\/li\u003e\n\n\u003cli class=\"p1\"\u003e \n\u003cb\u003efirst-rate sound, historical and collectible\u003c\/b\u003e \u003cspan class=\"s1\"\u003evalue\u003c\/span\u003e \u003cspan class=\"s1\"\u003e.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp class=\"p1\"\u003e A pair intended for \u003cspan class=\"s1\"\u003e\u003cb\u003ereference systems and demanding collectors\u003c\/b\u003e\u003c\/span\u003e , for those who desire \u003cspan class=\"s1\"\u003e\u003cb\u003ethe original Mullard sound\u003c\/b\u003e\u003c\/span\u003e , rich, natural and deeply emotional, in the 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\u003eVa = 250V ; Vg = -2V\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eAverage 100%:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1600 ; Ia = 1.2 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\u003e \u003cstrong\u003eValve #1:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1:\u003c\/strong\u003e \u003cspan\u003eGm = 1500 ; Ia = 1.2 mA\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e \u003cspan\u003eGm = 1600 ; Ia = 1.2 mA\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve #2:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1:\u003c\/strong\u003e \u003cspan\u003eGm = 1500 ; Ia = 1.2 mA\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e \u003cspan\u003eGm = 1500 ; Ia = 1.3 mA\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003cdiv\u003e\u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003c\/div\u003e\n\n\u003cul\u003e\n\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\n\u003c\/li\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eNoise:\u003c\/strong\u003e Low and well-controlled. Silent operation in hi-fi and music amplifiers in the intended positions.\u003c\/span\u003e\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 \u003cspan\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Excellent – ​​Very strong and stable output, no fluctuations.\u003c\/span\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e Absent.\u003c\/span\u003e\n\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 NOS - New Old Stock - Tested and working - Supplied in our custom box for optimal protection.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eFunctionality:\u003c\/strong\u003e Fully functional.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cstrong\u003eCosmetic condition:\u003c\/strong\u003e Excellent – ​​Excellently preserved lettering, minimal signs of wear. See photos for details.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e f92 B8K→ f9x indicates an ECC83 with the sequential progression of x, where the increment of x indicates the production changes -\u003cmeta charset=\"utf-8\"\u003e B8K B → Mullard, Blackburn - 8 (out of three digits) → 1958 - K → November\u003c\/li\u003e\n\n\u003cli\u003e f92 B8L→ f9x indicates an ECC83 with the sequential progression of x, where the increment of x indicates the production changes -\u003cmeta charset=\"utf-8\"\u003e B8K B → Mullard, Blackburn - 8 (over three figures) → 1958 - L → December\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\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":"MULLARD","offers":[{"title":"Default Title","offer_id":56627748208988,"sku":"03401","price":55700.0,"currency_code":"ISK","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_28414a2a-aa07-403a-bdef-9fad3fa51dd8.jpg?v=1770033130","url":"https:\/\/vacuumtubestreasures.com\/en-is\/products\/12ax7-ecc83-nos-mullard-blackburn-1958-long-gray-plates-goalpost-getter-matched-pair","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}