{"product_id":"12ax7-ecc83-nos-mullard-blackburn-1964-short-gray-plates-halo-getter-low-noise-mic","title":"12AX7 \/ ECC83 NOS MULLARD Blackburn 1964 – Short Gray Plates – Halo Getter – Low Noise \u0026amp; Mic","description":"\u003cp\u003e \u003cstrong\u003e12AX7 \/ ECC83 NOS MULLARD – Blackburn (Great Britain) 1964\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eShort Gray Plates – Halo Getter – Balanced Sections – Low Noise \u0026amp; Microphonics\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3 data-end=\"650\" data-start=\"636\"\u003e \u003cstrong\u003eDescription\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-end=\"881\" data-start=\"652\"\u003e This NOS MULLARD 12AX7 \/ ECC83 was produced in the historic Blackburn factory (Great Britain) in 1964 and belongs to the mature phase of Mullard production of the early 1960s, recognizable by the restyled branding.\u003c\/p\u003e\n\n\u003cp data-end=\"1073\" data-start=\"883\"\u003e The configuration with \u003cstrong data-end=\"940\" data-start=\"905\"\u003eshort gray plates and halo getter\u003c\/strong\u003e identifies a technically advanced version, appreciated for its electrical stability, operational silence and great tonal coherence.\u003c\/p\u003e\n\n \u003cp data-end=\"1381\" data-start=\"1075\"\u003eThe example is in \u003cstrong data-end=\"1120\" data-start=\"1092\"\u003eauthentic NOS condition\u003c\/strong\u003e , tested on AMPLITREX AT-1000 with \u003cstrong data-end=\"1180\" data-start=\"1165\"\u003eVERY STRONG\u003c\/strong\u003e result, it features \u003cstrong data-end=\"1213\" data-start=\"1191\"\u003ebalanced sections\u003c\/strong\u003e and low noise and contained microphonics. A reliable tube, musically balanced and perfectly suited to both hi-fi and quality instrumental applications.\u003c\/p\u003e\n\n\u003ch3 data-end=\"1413\" data-start=\"1388\"\u003e \u003cstrong\u003eSound Characteristics\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-end=\"1426\" data-start=\"1415\"\u003e \u003cstrong\u003eBass:\u003c\/strong\u003e Compact, controlled, and well-structured. The low range is precise and defined, with excellent articulation and no tendency toward excess.\u003c\/p\u003e\n\n\u003cp data-end=\"1573\" data-start=\"1563\"\u003e \u003cstrong\u003eMids:\u003c\/strong\u003e The typical Mullard character is fully present: warm, natural, and three-dimensional. Vocals are fluid and believable, with a balanced and engaging harmonic texture.\u003c\/p\u003e\n\n\u003cp data-end=\"1760\" data-start=\"1750\"\u003e \u003cstrong\u003eHighs:\u003c\/strong\u003e Refined, well-extended, and integrated. The highs are airy yet controlled, allowing for long, never-fatiguing listening sessions.\u003c\/p\u003e\n\n \u003cp data-end=\"1902\" data-start=\"1888\"\u003e\u003cstrong\u003eDynamics:\u003c\/strong\u003e Smooth and stable. Excellent microdynamics and responsive yet composed transient response, with great overall musicality.\u003c\/p\u003e\n\n\u003cp data-end=\"2039\" data-start=\"2023\"\u003e \u003cstrong\u003eSoundstage:\u003c\/strong\u003e Wide and well-focused. The soundstage is stable and coherent, with natural separation of musical lines.\u003c\/p\u003e\n\n\u003ch3 data-end=\"2188\" data-start=\"2156\"\u003e \u003cstrong\u003e🎧 Use in Hi-Fi Amplifiers\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-end=\"2201\" data-start=\"2190\"\u003e Ideal for:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli data-end=\"2243\" data-start=\"2205\"\u003e input and pre-amplification stages,\u003c\/li\u003e\n\n\u003cli data-end=\"2313\" data-start=\"2246\"\u003e integrated and pre-hi-fi where silence and stability are required,\u003c\/li\u003e\n\n\u003cli data-end=\"2399\" data-start=\"2316\"\u003e medium-high level systems that benefit from tonal balance and naturalness.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-end=\"2471\" data-start=\"2401\"\u003e Particularly suitable for jazz, classical, vocal and acoustic music.\u003c\/p\u003e\n\n\u003ch3 data-end=\"2512\" data-start=\"2478\"\u003e \u003cstrong\u003e🎸 Use in Music Applications\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-end=\"2540\" data-start=\"2514\"\u003e Also highly appreciated in:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e vintage and boutique guitar amplifiers,\u003c\/li\u003e\n\n\u003cli\u003e V1 position, thanks to \u003cstrong data-end=\"2648\" data-start=\"2616\"\u003elow noise \u0026amp; low microphonics\u003c\/strong\u003e and well-balanced sections.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-end=\"2803\" data-start=\"2676\"\u003e It offers controlled harmonic response, good definition and the classic British Mullard character in a mature and stable version.\u003c\/p\u003e\n\n \u003ch3 data-end=\"2834\" data-start=\"2810\"\u003e\u003cstrong\u003e🎯 Note for audiophiles\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli data-end=\"2950\" data-start=\"2928\"\u003e VERY STRONG issue,\u003c\/li\u003e\n\n\u003cli data-end=\"2972\" data-start=\"2953\"\u003e balanced sections,\u003c\/li\u003e\n\n\u003cli data-end=\"3004\" data-start=\"2975\"\u003e AMPLITREX professional test,\u003c\/li\u003e\n\n\u003cli data-end=\"3060\" data-start=\"3007\"\u003e original Blackburn production with restyled logo.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-end=\"3284\" data-start=\"3062\"\u003e A valve designed for those who want the authentic Mullard sound in a more recent, reliable version that can be perfectly used in hi-fi and music systems, with the usual Vacuum Tubes Treasures quality standard.\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:\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 = 0.9 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 = 1.1 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\n\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\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\u003cli\u003e\n\n \u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e I63 B4D5 → I6x indicates an ECC83 with the sequential progression of x, where the increment of x indicates the manufacturing changes -\u003cmeta charset=\"utf-8\"\u003e B4D5 B → Mullard, Blackburn - 4 (out of four digits) → 1964 - D → April - 5 → 5th week of the month\u003cbr\u003e\n\n\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":56706705391964,"sku":"03419","price":2097.0,"currency_code":"NOK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/3_6d94e99c-f01e-4351-9958-86cb586b7bee.jpg?v=1770891349","url":"https:\/\/vacuumtubestreasures.com\/en-no\/products\/12ax7-ecc83-nos-mullard-blackburn-1964-short-gray-plates-halo-getter-low-noise-mic","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}