{"product_id":"12ax7-ecc83-baldwin-by-sylvania-character-grade-set-da-4-long-gray-plates-halo-getter-usa","title":"12AX7 \/ ECC83 Baldwin by Sylvania Matched Quad Long Gray Plates Halo Getter Made in USA","description":"\u003cp\u003e \u003cstrong\u003e12AX7 \/ ECC83 Baldwin by Sylvania Matched Quad Long Gray Plates Halo Getter Made in USA\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003e \u003cstrong\u003eDescription:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n \u003cp class=\"\" data-end=\"703\" data-start=\"214\"\u003eThere\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"246\" data-start=\"217\"\u003e12AX7 Baldwin by Sylvania\u003c\/strong\u003e , produced in the\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"287\" data-start=\"263\"\u003eUnited States in 1952\u003c\/strong\u003e , is a valve selected for Baldwin organs and built by Sylvania with\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"387\" data-start=\"362\"\u003elong gray plates\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAnd\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"429\" data-start=\"390\"\u003elarge diameter ring getter\u003c\/strong\u003e , according to rigorous selection standards. This\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"499\" data-start=\"478\"\u003ematched quartet\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erepresents a rare combination of\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"604\" data-start=\"537\"\u003enatural musicality, quiet operation and timbral coherence\u003c\/strong\u003e , ideal for symmetrical stereo applications or high-precision multi-channel configurations.\u003c\/p\u003e\n\n \u003cp class=\"\" data-end=\"900\" data-start=\"705\"\u003e\u003cstrong data-end=\"714\" data-start=\"705\"\u003eBass\u003c\/strong\u003e : Smooth and well-controlled, with a balanced presence free of bloat. They provide a solid and coherent foundation for the soundstage, with excellent articulation in the lower registers.\u003c\/p\u003e\n\n\u003cp class=\"\" data-end=\"1101\" data-start=\"902\"\u003e \u003cstrong data-end=\"910\" data-start=\"902\"\u003eMids\u003c\/strong\u003e : Warm, slightly euphonic, and rich in harmonics. Vocals and acoustic instruments emerge naturally and deeply, always maintaining a consistent timbre across the tubes in the group.\u003c\/p\u003e\n\n\u003cp class=\"\" data-end=\"1267\" data-start=\"1103\"\u003e \u003cstrong data-end=\"1111\" data-start=\"1103\"\u003eHighs\u003c\/strong\u003e : Airy and velvety, free from harshness. Even on highly analytical systems, the high range retains brilliance and musicality without tiring the listener.\u003c\/p\u003e\n\n\u003cp class=\"\" data-end=\"1465\" data-start=\"1269\"\u003e \u003cstrong data-end=\"1281\" data-start=\"1269\"\u003eDynamics\u003c\/strong\u003e : Smooth, musical, and well-balanced. The quartet delivers a cohesive and natural response, with well-managed microtransients and a linear, reliable behavior from each tube.\u003c\/p\u003e\n\n \u003cp class=\"\" data-end=\"1679\" data-start=\"1467\"\u003e\u003cstrong data-end=\"1481\" data-start=\"1467\"\u003eSoundstage\u003c\/strong\u003e : Wide, three-dimensional, and stable. Thanks to accurate matching, the soundstage is deeply coherent, with excellent separation between the sound planes and a sense of well-distributed space.\u003c\/p\u003e\n\n\u003cp class=\"\" data-end=\"2051\" data-start=\"1681\"\u003e This\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"1748\" data-start=\"1688\"\u003ematched quartet of Sylvania 12AX7s produced for Baldwin\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIt is an excellent choice for those looking for a\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"1848\" data-start=\"1791\"\u003erefined, musical and homogeneous timbre presentation\u003c\/strong\u003e , ideal for\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"1979\" data-start=\"1861\"\u003emulti-channel preamplifiers, dual-mono stereo amplifiers, balanced DACs, or high-end hi-fi systems\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewhere the\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"2030\" data-start=\"1988\"\u003esymmetry and precision between channels\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethey make the difference.\u003c\/p\u003e\n\n \u003cp data-start=\"215\" data-end=\"691\" class=\"\"\u003e🎸\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"218\" data-end=\"263\"\u003eUse in Guitar and Bass Amplifiers\u003c\/strong\u003e\u003cbr data-start=\"263\" data-end=\"266\"\u003e\u003c\/p\u003e\n\n\u003cp class=\"\" data-end=\"756\" data-start=\"247\"\u003e This \u003cstrong data-end=\"379\" data-start=\"305\"\u003ematched quartet of 12AX7 Baldwin by Sylvania long plate grey lamps\u003c\/strong\u003e , selected for professional use, is particularly suitable for\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"502\" data-start=\"443\"\u003estereo heads, amplifiers with multiple gain stages\u003c\/strong\u003e , or\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"532\" data-start=\"513\"\u003epre-multichannel\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ein which the\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"582\" data-start=\"543\"\u003etimbre consistency between the valves\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis fundamental. Their sweet, harmonious and coherent response allows to obtain a sound\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"708\" data-start=\"673\"\u003emusical, articulated and natural\u003c\/strong\u003e , even in complex or studio configurations.\u003c\/p\u003e\n\n\u003cp class=\"\" data-end=\"1072\" data-start=\"758\"\u003e 🔊\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"798\" data-start=\"761\"\u003eIdeal for musicians looking for:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n \u003cli data-end=\"1072\" data-start=\"758\"\u003eTimbral uniformity and consistent response across all channels\u003cbr data-end=\"863\" data-start=\"860\"\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-end=\"1072\" data-start=\"758\"\u003e Clean three-dimensional, warm and well separated\u003cbr data-end=\"912\" data-start=\"909\"\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-end=\"1072\" data-start=\"758\"\u003e A smooth and harmonic overdrive, ideal for jazz, blues and vintage rock\u003cbr data-end=\"986\" data-start=\"983\"\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-end=\"1072\" data-start=\"758\"\u003e Low microphonics, perfect even in studio racks or professional live systems\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp class=\"\" data-end=\"1585\" data-start=\"1074\"\u003e \u003cstrong data-end=\"1122\" data-start=\"1074\"\u003eExamples of applications where they perform at their best:\u003c\/strong\u003e\u003cbr data-end=\"1125\" data-start=\"1122\"\u003e 🎸\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"1227\" data-start=\"1128\"\u003eBoutique stereo heads (Two Rock Studio Signature, Matchless HC-30, Mesa Boogie Studio Preamp)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– Ensures timbre symmetry between channels and great musicality\u003cbr data-end=\"1295\" data-start=\"1292\"\u003e 🎸\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"1390\" data-start=\"1298\"\u003eVintage amps with multiple preamp tubes (Fender Bassman 6G6, Marshall Super Lead, Ampeg V4)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– Makes the sound more consistent and refined throughout the chain \u003cbr data-end=\"1457\" data-start=\"1454\"\u003e🎸\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-is-only-node=\"\" data-end=\"1509\" data-start=\"1460\"\u003eMulti-channel preamplifiers for studio or live use\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e– Ideal for ensuring tonal consistency and low noise in each channel\u003c\/p\u003e\n\n\u003cp class=\"\" data-end=\"2048\" data-start=\"1587\"\u003e 🎯\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"1635\" data-start=\"1590\"\u003eNote to musicians and studio engineers:\u003c\/strong\u003e\u003cbr data-end=\"1638\" data-start=\"1635\"\u003e This matched quartet represents a\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"1769\" data-start=\"1679\"\u003eprofessional solution for those looking for coherence and musicality at every point of the circuit\u003c\/strong\u003e . It is not suitable for those who want a pushed, saturated or aggressive sound: in that case, more pushed valves like the modern Tung-Sol may be preferred. But for those who love the\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-end=\"2001\" data-start=\"1936\"\u003evintage touch, natural detail and harmonic depth\u003c\/strong\u003e , it is one of the finest choices available.\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\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 GOOD\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\u003e \u003c\/span\u003eGm = 1200 ; Ia = 0.7 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1300 ; Ia = 0.7 mA\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\u003e \u003c\/span\u003eGm = 1300 ; Ia = 0.8 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1200 ; Ia = 0.7 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve 3:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1200 ; Ia = 0.7 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1300 ; Ia = 0.8 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cstrong\u003eValve 4:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1300 ; Ia = 0.7 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1400 ; Ia = 0.8 mA\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 guitar amplifiers, including V1.\u003c\/span\u003e\n\u003c\/li\u003e\n\n \u003cli\u003e\u003cspan\u003e\u003cstrong\u003eBalance:\u003c\/strong\u003e The sections present a coherent overall balance, fully compatible with use in musical amplifiers, in all applications where absolute symmetry between the sections is not required.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e \u003cspan\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e Excellent – ​​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 Vintage tubes - Tested and in perfect working order. Shipped 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\n \u003cstrong\u003eCosmetic condition:\u003c\/strong\u003e Good – Lettering partially eroded, but still legible. Valve body in good condition. See photos for details.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e 312 239 → 312 indicates the manufacturer, i.e. Sylvania Electric Products Inc., Emporium, Pa. - 239 → 2 (out of three digits) → 1952 - 39 → 39th week of the year\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":56521971564892,"sku":"03376","price":125.86,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1.jpg?v=1769179821","url":"https:\/\/vacuumtubestreasures.com\/en-ie\/products\/12ax7-ecc83-baldwin-by-sylvania-character-grade-set-da-4-long-gray-plates-halo-getter-usa","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}