{"product_id":"12ax7-ecc83-nos-amperex-bugle-boy-matched-pair-amplitrex-tested-long-plates-foil-getter-50s-1","title":"12AX7 \/ ECC83 NOS Amperex Bugle Boy Matched Pair AMPLITREX Tested Long Plates Foil Getter '59","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003e12AX7 \/ ECC83 NOS Amperex Bugle Boy – Matched Pair – Long Plates – Foil Getter – Made in Holland ’59 – Amplitrex Tested\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"347\" data-end=\"685\"\u003eThis pair of \u003cstrong data-start=\"391\" data-end=\"430\"\u003eNOS Amperex Bugle Boy 12AX7 \/ ECC83\u003c\/strong\u003e, manufactured in \u003cstrong data-start=\"443\" data-end=\"468\"\u003eHeerlen (Holland) in 1959\u003c\/strong\u003e, belongs to the historical phase of the first \u003cstrong data-start=\"511\" data-end=\"538\"\u003eLong Plates Foil Getter\u003c\/strong\u003e, one of the configurations most sought after by enthusiasts today for its musicality, tonal refinement, and extremely meticulous internal construction.\u003c\/p\u003e\n\u003cp data-start=\"687\" data-end=\"763\"\u003eThe Heerlen manufacturing codes are authentic and perfectly consistent:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eΔ9B\u003c\/b\u003e\u003c\/span\u003e → 1959\u003c\/li\u003e\n\u003cli class=\"p1\"\u003efactory identified by the symbol \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 pair from consecutive years of 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 item is in \u003cspan class=\"s2\"\u003e\u003cb\u003eauthentic NOS condition\u003c\/b\u003e\u003c\/span\u003e, tested in our laboratory with \u003cspan class=\"s2\"\u003e\u003cb\u003eAmplitrex AT-1000\u003c\/b\u003e\u003c\/span\u003e, with a \u003cspan class=\"s2\"\u003e\u003cb\u003eVERY STRONG\u003c\/b\u003e\u003c\/span\u003e result, stable sections and perfectly suitable even for sensitive circuit positions.\u003c\/p\u003e\n\u003cp data-start=\"1251\" data-end=\"1484\"\u003e\u003cstrong data-start=\"1253\" data-end=\"1279\"\u003eSonic Characteristics\u003c\/strong\u003e\u003cbr data-start=\"1279\" data-end=\"1282\"\u003e\u003c\/p\u003e\n\u003cp data-start=\"1251\" data-end=\"1484\"\u003eThe \u003cstrong data-start=\"1285\" data-end=\"1312\"\u003eHeerlen '59 Long Plates\u003c\/strong\u003e are renowned for their three-dimensional, airy, and nuanced musicality. They offer a fuller and more natural presentation compared to the short plates of the 1960s.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1486\" data-end=\"1652\"\u003e\n\u003cstrong data-start=\"1486\" data-end=\"1495\"\u003eBass: \u003c\/strong\u003eDeep, smooth, and articulate. The low end has body and definition without ever sounding boomy. Excellent control even in the most complex passages.\u003c\/li\u003e\n\u003cli data-start=\"1654\" data-end=\"1872\"\u003e\n\u003cstrong data-start=\"1654\" data-end=\"1662\"\u003eMids: \u003c\/strong\u003eThe heart of Amperex's philosophy: \u003cstrong data-start=\"1704\" data-end=\"1751\"\u003ebright, transparent, and harmonically rich\u003c\/strong\u003e mids, with vocal reproduction that remains among the most natural ever. Acoustic instruments and jazz emerge with remarkable realism.\u003c\/li\u003e\n\u003cli data-start=\"1874\" data-end=\"2022\"\u003e\n\u003cstrong data-start=\"1874\" data-end=\"1882\"\u003eHighs: \u003c\/strong\u003eSilky, open, never aggressive. The foil getter architecture provides fine, brilliant highs rich in air, with superior micro-detail.\u003c\/li\u003e\n\u003cli data-start=\"2024\" data-end=\"2191\"\u003e\n\u003cstrong data-start=\"2024\" data-end=\"2036\"\u003eDynamics: \u003c\/strong\u003eResponsive and fluid. Fast yet natural attack, smooth release: the pair maintains a very musical and consistent performance with the test results.\u003c\/li\u003e\n\u003cli data-start=\"2193\" data-end=\"2403\"\u003e\n\u003cstrong data-start=\"2193\" data-end=\"2207\"\u003eSoundstage: \u003c\/strong\u003eWide, deep, three-dimensional. Splendid separation of musical lines, stable soundstage with excellent breath. Heerlen long plates are known precisely for this superior scenic capability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2405\" data-end=\"2463\"\u003e🎧 \u003cstrong data-start=\"2408\" data-end=\"2445\"\u003eUse in Hi-Fi Stereo Amplifiers\u003c\/strong\u003e\u003cbr data-start=\"2445\" data-end=\"2448\"\u003ePerfect for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2466\" data-end=\"2494\"\u003ehigh-end preamplifiers,\u003c\/li\u003e\n\u003cli data-start=\"2497\" data-end=\"2520\"\u003erefined line stages,\u003c\/li\u003e\n\u003cli data-start=\"2523\" data-end=\"2568\"\u003evintage European and American amplifiers,\u003c\/li\u003e\n\u003cli data-start=\"2571\" data-end=\"2609\"\u003eDACs with quality tube stages.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2611\" data-end=\"2750\"\u003eIdeal tubes for jazz, vocal, ambient, classical, and acoustic music, where a natural, rich, and three-dimensional presentation is desired.\u003c\/p\u003e\n\u003cp data-start=\"2752\" data-end=\"2838\"\u003e🎸 \u003cstrong data-start=\"2755\" data-end=\"2788\"\u003eUse in Musical Amplifiers\u003c\/strong\u003e\u003cbr data-start=\"2788\" data-end=\"2791\"\u003eExcellent for vintage and boutique guitar amps:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2841\" data-end=\"2869\"\u003esweet and musical break-up,\u003c\/li\u003e\n\u003cli data-start=\"2872\" data-end=\"2891\"\u003erich harmonics,\u003c\/li\u003e\n\u003cli data-start=\"2894\" data-end=\"2920\"\u003ebright European clean,\u003c\/li\u003e\n\u003cli data-start=\"2923\" data-end=\"2952\"\u003ewarm and controlled crunch.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2954\" data-end=\"3068\"\u003eSuitable for positions where vintage harmonics and tone are sought.\u003c\/p\u003e\n\u003cp data-start=\"3070\" data-end=\"3176\"\u003e🎯 \u003cstrong data-start=\"3073\" data-end=\"3105\"\u003eNote for audiophiles and technicians\u003c\/strong\u003e\u003cbr data-start=\"3105\" data-end=\"3108\"\u003eThis pair represents a rare and highly sought-after combination.\u003cstrong data-start=\"3179\" data-end=\"3213\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"3349\" data-end=\"3572\"\u003ePerfect for collectors, restorers, and enthusiasts who desire the true sonic signature of 1950s Heerlen Amperex tubes.\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eTube tested on \u003cstrong\u003eAMPLITREX AT-1000 \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 VERY STRONG\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTube 1:\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 = 1.0 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1500 ; Ia = 0.9 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTube 2:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1400 ; Ia = 1.0 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1400 ; Ia = 0.8 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 \u003cmeta charset=\"utf-8\"\u003eLow. Tested and suitable for use in hi-fi and guitar amplifiers. Suitable for use in V1.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eEmission Quality:\u003c\/strong\u003e Excellent – Very strong and stable emission, no 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 \u003cmeta charset=\"utf-8\"\u003eVintage Tubes - Tested and perfectly working. Supplied in our custom box for optimal protection.\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\u003eAesthetic Condition:\u003c\/strong\u003e Good – Labels partially eroded, 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\u003eΔ9B \u003c\/span\u003e- ??? \u003cmeta charset=\"utf-8\"\u003e→ Internal structure consistent with Heerlen Long Plate Foil Getter production from the late 1950s. - \u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eΔ9B\u003c\/span\u003e Δ → Heerlen (Holland), 9 (on three digits) → 1959 - B → February \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\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":57297879171420,"sku":"03511+03493_ONSPEC","price":599.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_101a4738-bb1d-4830-b851-0ce40523a800.jpg?v=1775642732","url":"https:\/\/vacuumtubestreasures.com\/en\/products\/12ax7-ecc83-nos-amperex-bugle-boy-matched-pair-amplitrex-tested-long-plates-foil-getter-50s-1","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}