{"product_id":"12ax7-ecc83-nos-amperex-bugle-boy-amplitrex-tested-long-plates-foil-getter-59","title":"12AX7 \/ ECC83 NOS Amperex Bugle Boy AMPLITREX Tested Long Plates Foil Getter '58","description":"\u003cp\u003e\u003cstrong\u003e12AX7 \/ ECC83 NOS Amperex Bugle Boy Long Plates – Foil Getter – Heerlen 1958 – Amplitrex Tested\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p3\"\u003e\u003cmeta charset=\"utf-8\"\u003eThis \u003cstrong data-end=\"430\" data-start=\"391\"\u003eNOS Amperex Bugle Boy 12AX7 \/ ECC83\u003c\/strong\u003e, \u003cstrong data-end=\"468\" data-start=\"443\"\u003eHeerlen (Netherlands) 1958\u003c\/strong\u003e production, belongs to the historical phase of the first \u003cstrong data-end=\"538\" data-start=\"511\"\u003eLong Plates Foil Getter\u003c\/strong\u003e, one of the most sought-after configurations by enthusiasts today for its musicality, tonal refinement, and meticulously crafted internal construction.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe manufacturing code is authentic and consistent with Heerlen production:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e\n\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong data-end=\"965\" data-start=\"958\"\u003eΔ8A\u003c\/strong\u003e \u003c\/span\u003e→ 1958\u003c\/li\u003e\n\u003cli class=\"p1\"\u003efactory identified by the symbol\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eΔ (Heerlen, Holland)\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eA tube from the Heerlen \"golden era,\" with a long plate foil getter internal structure typical of early European production.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe specimen is in \u003cspan class=\"s2\"\u003e\u003cb\u003every good condition\u003c\/b\u003e\u003c\/span\u003e, tested in our laboratory with\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"s2\"\u003e\u003cb\u003eAmplitrex AT-1000\u003c\/b\u003e\u003c\/span\u003e, with a\u003cspan class=\"s2\"\u003e\u003cb\u003e\u003cspan\u003e VERY \u003c\/span\u003eSTRONG\u003c\/b\u003e\u003c\/span\u003e result, stable sections perfectly suitable even for sensitive circuit positions.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSonic Characteristics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p3\"\u003eThe Heerlen Long Plates from the late 1950s are appreciated for their broad, natural, and airy sound, with great harmonic coherence.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBass:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eDeep, compact, and well-articulated. Excellent control without artificial emphasis.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMidrange:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eBright and transparent, with excellent vocal reproduction. Harmonics are rich but always balanced, with the naturalness typical of the Heerlen school.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTreble:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eSilky and well-extended. The foil getter contributes to superior extension, with refined and never aggressive micro-detail.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDynamics:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eResponsive and fluid. Excellent transient response and stable performance even on complex passages.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSoundstage:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eWide and well-layered. Natural instrument separation and a credible, three-dimensional soundscape.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e🎧 Use in Hi-Fi Stereo Amplifiers\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"p3\"\u003eIdeal for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003ehigh-end preamplifiers,\u003c\/li\u003e\n\u003cli class=\"p1\"\u003etube line stages,\u003c\/li\u003e\n\u003cli class=\"p1\"\u003evintage European and American amplification,\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eDACs with tube stages.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eParticularly suitable for jazz, vocal, acoustic music, and classical repertoire.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003e🎸 Use in Musical Amplifiers\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp class=\"p3\"\u003eExcellent for vintage and boutique guitar amplifiers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eprogressive and musical break-up,\u003c\/li\u003e\n\u003cli class=\"p1\"\u003erich harmonics,\u003c\/li\u003e\n\u003cli class=\"p1\"\u003ebright and natural clean tone,\u003c\/li\u003e\n\u003cli class=\"p1\"\u003econtrolled and warm crunch.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eAlso perfectly suitable for V1 position thanks to\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"s2\"\u003e\u003cb\u003eLow Noise \u0026amp; Low Microphonics\u003c\/b\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e🎯 Note for Audiophiles and Collectors\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eHeerlen 1958 production\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eFirst generation Long Plates Foil Getter\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eprofessional Amplitrex test\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eVERY STRONG emission\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eA tube of great historical and musical value, designed for those who desire the true Amperex sound signature of the late 1950s, meeting the full Vacuum Tubes Treasures quality standard.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eTube tested on\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAMPLITREX AT-1000\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eTube Tester:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e\u003cspan\u003e Va = 250V ; Vg = -2V\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage 100%:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1600 ; Ia = 1.2 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest Result:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eVERY STRONG\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTube :\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1600 ; Ia = 1.1 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1600 ; Ia = 1.2 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 Very Low. Tested and compliant for use in hi-fi and guitar amplifiers. Compliant for use in V1.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eBalance:\u003c\/strong\u003e The sections are consistent and well-aligned, making the tube suitable also for use as a phase inverter in hi-fi and instrumental applications.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eEmission Quality:\u003c\/strong\u003e Excellent – Very strong and stable emission, without fluctuations.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eShorts and GAS:\u003c\/strong\u003e Absent.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e\u003cspan\u003e NOS - New Old Stock - Tested and working - Supplied in our custom box for optimal protection.\u003c\/span\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunctionality: \u003c\/strong\u003ePerfectly operational.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCosmetic condition:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGood – Markings partially erased, but still legible. Tube body in good condition. See photos for details.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e??? \u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eΔ8A \u003c\/span\u003e- \u003cmeta charset=\"utf-8\"\u003eΔ → Heerlen (Holland), 8 (on three digits) → 1958 - A → January \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" title=\"Perché le nostre valvole sono diverse – il protocollo VTT che migliora suono, affidabilità e durata\" rel=\"noopener\" 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":57300882424156,"sku":"03514","price":289.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/4_42aa47ed-d182-4640-9d24-55681fe9a382.jpg?v=1775655875","url":"https:\/\/vacuumtubestreasures.com\/en-mc\/products\/12ax7-ecc83-nos-amperex-bugle-boy-amplitrex-tested-long-plates-foil-getter-59","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}