{"product_id":"12au7a-ecc82-nos-baldwin-by-sylvania-long-gray-plates-halo-getter-matched-pair-tubes-made-in-usa-60s-1","title":"12AU7A \/ ECC82 NOS Baldwin by SYLVANIA Long Gray Plates Halo Getter Matched Pair Tubes Made in USA '60s","description":"\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e12AU7 \/ ECC82 NOS Baldwin by SYLVANIA Matched Pair Long Gray Plates Halo Getter AMPLITREX Tested Made in USA ’60\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p2\"\u003e\u003cb\u003eAMPLITREX Matched Pair – Low Noise \u0026amp; Microphonics – Vintage American SYLVANIA Production\u003c\/b\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eDescription\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p3\"\u003eThis matched pair of \u003cspan class=\"s1\"\u003e\u003cb\u003e12AU7 \/ ECC82 NOS Baldwin by Sylvania\u003c\/b\u003e\u003c\/span\u003e, \u003cspan class=\"s1\"\u003e\u003cb\u003eMade in USA 1960\u003c\/b\u003e\u003c\/span\u003e production, represents a high-level American selection, designed for hi-fi and musical applications where consistency between tubes, low noise, and operational stability are fundamental aspects.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eTubes branded \u003cspan class=\"s1\"\u003e\u003cb\u003eBaldwin\u003c\/b\u003e\u003c\/span\u003e were intended for musical and professional applications, particularly quality electronic organs, where reliable, stable, and quiet tubes were required. Behind the Baldwin brand, in this case, we find \u003cspan class=\"s1\"\u003e\u003cb\u003eSylvania Electric Products Inc.\u003c\/b\u003e\u003c\/span\u003e production, recognizable by the construction with \u003cspan class=\"s1\"\u003e\u003cb\u003eLong Gray Plates\u003c\/b\u003e\u003c\/span\u003e and \u003cspan class=\"s1\"\u003e\u003cb\u003eHalo Getter\u003c\/b\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe pair comes from the same manufacturing code \u003cspan class=\"s1\"\u003e\u003cb\u003e312 052\u003c\/b\u003e\u003c\/span\u003e, traceable to the \u003cspan class=\"s1\"\u003e\u003cb\u003e52nd week of 1960\u003c\/b\u003e\u003c\/span\u003e. This element adds technical and collectible value, offering great production consistency between the two specimens.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe tubes are in \u003cspan class=\"s1\"\u003e\u003cb\u003eNOS – New Old Stock\u003c\/b\u003e\u003c\/span\u003e condition, tested and selected using an \u003cspan class=\"s1\"\u003e\u003cb\u003eAMPLITREX AT-1000 Tube Tester\u003c\/b\u003e\u003c\/span\u003e as a \u003cspan class=\"s1\"\u003e\u003cb\u003eMatched Pair\u003c\/b\u003e\u003c\/span\u003e, with an overall result of \u003cspan class=\"s1\"\u003e\u003cb\u003eVERY STRONG\u003c\/b\u003e\u003c\/span\u003e, low microphonics, low noise, and \u003cspan class=\"s1\"\u003e\u003cb\u003e48h Burning Test passed\u003c\/b\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe strength of this pair is not just their very solid electrical state, but above all the consistency of values between the two tubes, a characteristic particularly important in stereo preamplifiers, line stages, and applications where uniformity between channels is desired.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eFrom an aesthetic point of view, the pair is in \u003cspan class=\"s1\"\u003e\u003cb\u003eexcellent\u003c\/b\u003e\u003c\/span\u003e condition, with well-preserved lettering, clean internal structure, and minimal signs of age. See photos for details.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eTonal Characteristics and Sound Description\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p3\"\u003eSylvania Long Gray Plates from the early 60s are appreciated for a balanced, open, and natural sound reproduction, with a very recognizable American musicality.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eIn this matched pair selection, the consistency between the two tubes contributes to a stable, orderly, and very pleasant presentation, ideal for quality stereo systems.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eBass\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe bass range is controlled, articulated, and well-supported. It offers a solid foundation without being intrusive, maintaining rhythm and clarity even in the most complex passages.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eMids\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eMids are natural, clear, and musical. Vocals and acoustic instruments are well-focused, with a balanced and pleasing harmonic texture.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eHighs\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe high range is open and clean, with good extension and a fluid, never aggressive presentation. Detail remains well integrated into the musical message.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eDynamics\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eDynamics are prompt and consistent, with a stable and well-controlled response. The matching of the pair helps maintain uniformity and tonal continuity between the two channels.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eSoundstage\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eThe soundstage appears wide, stable, and well-organized. The consistency of the pair favors correct instrument separation and a balanced presentation of the stereophonic image.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e🎧 Use in Stereo Hi-Fi Amplifiers\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p4\"\u003eThis matched pair is particularly suitable for:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003estereo tube preamplifiers\u003c\/li\u003e\n\n\u003cli\u003eline stages\u003c\/li\u003e\n\n\u003cli\u003edriver stages\u003c\/li\u003e\n\n\u003cli\u003eintegrated amplifiers\u003c\/li\u003e\n\n\u003cli\u003eDAC and tube buffers\u003c\/li\u003e\n\n\u003cli\u003erestorations of vintage American electronics\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eThe \u003cspan class=\"s1\"\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/span\u003e selection also makes it suitable for sensitive applications, including compatible phono stages and positions where silence and channel consistency are essential.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e🎸 Use in Musical Amplifiers\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p4\"\u003eIn musical instrument amplifiers and compatible professional equipment, these \u003cspan class=\"s1\"\u003e\u003cb\u003e12AU7 \/ ECC82 Baldwin by Sylvania\u003c\/b\u003e\u003c\/span\u003e can offer:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eexcellent operational stability\u003c\/li\u003e\n\n\u003cli\u003enatural harmonic response\u003c\/li\u003e\n\n\u003cli\u003econtained noise\u003c\/li\u003e\n\n\u003cli\u003elow microphonics\u003c\/li\u003e\n\n\u003cli\u003econsistent behavior between the two tubes\u003c\/li\u003e\n\n\u003cli\u003egood signal intelligibility\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eThese characteristics make the pair interesting for both studio and live applications, always respecting the technical compatibility of the equipment.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e🎯 Note for Audiophiles and Technicians\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p4\"\u003eThis pair combines elements particularly appreciated by enthusiasts:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cspan class=\"s1\"\u003e\u003cb\u003eSylvania Made in USA\u003c\/b\u003e\u003c\/span\u003e\u003cspan class=\"s2\"\u003e production\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cspan class=\"s1\"\u003e\u003cb\u003eBaldwin\u003c\/b\u003e\u003c\/span\u003e\u003cspan class=\"s2\"\u003e brand\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003esame manufacturing code \u003cspan class=\"s1\"\u003e\u003cb\u003e312 052\u003c\/b\u003e\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cspan class=\"s1\"\u003e\u003cb\u003e1960\u003c\/b\u003e\u003c\/span\u003e\u003cspan class=\"s2\"\u003e production\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eLong Gray Plates\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eHalo Getter\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eMatched Pair\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e48h Burning Test – OK\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eLow Noise \u0026amp; Microphonics\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eVERY STRONG\u003c\/b\u003e\u003c\/span\u003e performance on both tubes\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"p3\"\u003eA high-level selection for those who want a truly consistent, quiet, and stable pair, capable of offering the charm of vintage American production with modern, accurate, and documented verification.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eTest Results\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p2\"\u003eTubes tested on\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eAMPLITREX AT-1000 Tube Tester\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003eTest Conditions:\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eVa = 250V, Vg = -8.5V\u003cbr\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eAverage 100%:\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eGm = 2200; Ia = 10.5 mA\u003cbr\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eTest Result:\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eVERY STRONG\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eTube #11\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2300; Ia = 9.4 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2320; Ia = 10.2 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eTube #21\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 1:\u003c\/strong\u003e Gm = 2300; Ia = 10.2 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSection 2:\u003c\/strong\u003e Gm = 2400; Ia = 10.4 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eAdditional Tests Performed\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli class=\"p2\"\u003e\n\n\u003cb\u003eBurning Test:\u003c\/b\u003e\u003cspan class=\"s2\"\u003e 48h – OK\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eMicrophonics:\u003c\/b\u003e Low. Tested and suitable for hi-fi use, including phono stages and guitar amplifiers. Also suitable for V1 position.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eBalance:\u003c\/b\u003e The sections are consistent and well-aligned, making the tubes suitable for use as phase inverters in hi-fi and instrumental applications.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eEmission Quality:\u003c\/b\u003e Excellent – very strong and stable emission, without fluctuations.\u003c\/li\u003e\n\n\u003cli class=\"p2\"\u003e\n\n\u003cb\u003eShorts and GAS:\u003c\/b\u003e\u003cspan class=\"s2\"\u003e Absent.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eCondition\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eCondition:\u003c\/b\u003e NOS – New Old Stock – tested and working. Supplied in our custom box for optimal protection.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eFunctionality:\u003c\/b\u003e Perfectly operational.\u003c\/li\u003e\n\n\u003cli class=\"p3\"\u003e\n\n\u003cb\u003eAesthetic Condition:\u003c\/b\u003e Excellent – lettering perfectly preserved, minimal signs of age. See photos for details.\u003c\/li\u003e\n\n\u003cli class=\"p2\"\u003e\n\n\u003cb\u003eManufacturing Code: \u003c\/b\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e312 052\u003c\/b\u003e\u003c\/span\u003e\u003cspan class=\"s2\"\u003e → 312 indicates the manufacturer, which is \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eSylvania Electric Products Inc., Emporium, Pennsylvania\u003c\/b\u003e\u003c\/span\u003e\u003cspan class=\"s2\"\u003e. \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e052\u003c\/b\u003e\u003c\/span\u003e\u003cspan class=\"s2\"\u003e → 0 indicates \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e1960\u003c\/b\u003e\u003c\/span\u003e\u003cspan class=\"s2\"\u003e, 52 indicates the \u003c\/span\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e52nd week of the year\u003c\/b\u003e\u003c\/span\u003e\u003cspan class=\"s2\"\u003e.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan class=\"s2\"\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 – the VTT protocol that improves sound, reliability, and durability →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":58070076653916,"sku":"03658L","price":44.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_ebe1bfa7-9a29-41db-a302-b3914576ce54.jpg?v=1781361452","url":"https:\/\/vacuumtubestreasures.com\/en-fi\/products\/12au7a-ecc82-nos-baldwin-by-sylvania-long-gray-plates-halo-getter-matched-pair-tubes-made-in-usa-60s-1","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}