{"product_id":"5751-12ax7-ecc83-nos-sylvania-💎-gold-brand-gold-pin-disc-getter-amplitrex-tested-tube-made-in-usa","title":"5751 12AX7 ECC83 NOS Sylvania 💎 Gold Brand – Gold Pin Disc Getter Amplitrex Tested Tube USA","description":"\u003cp\u003e\u003cstrong\u003e5751 ( 12AX7 ECC83 ) NOS SYLVANIA 💎 Gold Brand Gold Pin Disc Getter AMPLITREX Tested Tube 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 data-start=\"292\" data-end=\"777\" class=\"\"\u003e The \u003cstrong data-start=\"295\" data-end=\"323\"\u003eSYLVANIA 5751 Gold Brand\u003c\/strong\u003e is one of the most popular versions of this well-known low-gain double triode (about 70% of that of a 12AX7), selected in the \u003cstrong data-start=\"467\" data-end=\"481\"\u003eGold Brand\u003c\/strong\u003e series with \u003cstrong data-start=\"486\" data-end=\"504\"\u003egold-plated feet\u003c\/strong\u003e for professional, military, and broadcast applications. Equipped with a \u003cstrong data-start=\"569\" data-end=\"584\"\u003edisc getter\u003c\/strong\u003e and carefully constructed internal structure, it offers a \u003cstrong data-start=\"645\" data-end=\"690\"\u003every refined, balanced, and quiet\u003c\/strong\u003e sound, ideal for both audiophile listening and for tonal control in critical environments.\u003c\/p\u003e\n\n \u003cp data-start=\"779\" data-end=\"1083\" class=\"\"\u003eThe 5751's character is \u003cstrong data-start=\"805\" data-end=\"834\"\u003etransparent and controlled\u003c\/strong\u003e , with a smoother response than a classic 12AX7, but without losing detail or musicality. It's often chosen to \u003cstrong data-start=\"964\" data-end=\"977\"\u003e\"calm down\"\u003c\/strong\u003e overly aggressive preamp sections or to improve resolution in high-end tube amplifiers.\u003c\/p\u003e\n\n\u003cp data-start=\"1085\" data-end=\"1228\" class=\"\"\u003e \u003cstrong data-start=\"1085\" data-end=\"1094\"\u003eBass\u003c\/strong\u003e : Dry and controlled, with good articulation. It lacks excessive emphasis, but ensures precision even on complex passages.\u003c\/p\u003e\n\n\u003cp data-start=\"1230\" data-end=\"1359\" class=\"\"\u003e \u003cstrong data-start=\"1230\" data-end=\"1238\"\u003eMids\u003c\/strong\u003e : rich in harmonic content, but never intrusive. Voices sound natural, with good body and excellent intelligibility.\u003c\/p\u003e\n\n\u003cp data-start=\"1361\" data-end=\"1488\" class=\"\"\u003e \u003cstrong data-start=\"1361\" data-end=\"1369\"\u003eHighs\u003c\/strong\u003e : Delicate and clean, without harshness. They offer an airy but well-regulated extension, suitable even for prolonged listening.\u003c\/p\u003e\n\n \u003cp data-start=\"1490\" data-end=\"1651\" class=\"\"\u003e\u003cstrong data-start=\"1490\" data-end=\"1502\"\u003eDynamics\u003c\/strong\u003e : Smoother and more progressive than a standard 12AX7, but very coherent. It delivers detail naturally, without artificial compression.\u003c\/p\u003e\n\n\u003cp data-start=\"1653\" data-end=\"1782\" class=\"\"\u003e \u003cstrong data-start=\"1653\" data-end=\"1667\"\u003eSoundstage\u003c\/strong\u003e : Wide and very focused, with depth and a well-defined presentation even on high-resolution systems.\u003c\/p\u003e\n\n\u003cp data-start=\"1784\" data-end=\"1977\" class=\"\"\u003e A perfect tube for hi-fi preamplifiers, phono stages, tube DACs, or even as a strategic replacement for 12AX7 in systems or instruments where greater balance and definition is needed.\u003c\/p\u003e\n\n\u003cp class=\"\" data-end=\"691\" data-start=\"215\"\u003e 🎸 \u003cstrong data-end=\"263\" data-start=\"218\"\u003eUse in Guitar and Bass Amplifiers\u003c\/strong\u003e\u003cbr data-end=\"266\" data-start=\"263\"\u003e\u003c\/p\u003e\n\n \u003cp data-start=\"209\" data-end=\"616\" class=\"\"\u003eThe \u003cstrong data-start=\"212\" data-end=\"240\"\u003eSYLVANIA 5751 Gold Brand\u003c\/strong\u003e is also a popular choice in the guitar world, especially for those who want \u003cstrong data-start=\"331\" data-end=\"397\"\u003eto slightly reduce the gain of a preamp stage\u003c\/strong\u003e for greater headroom, clarity, and articulation. Its sturdy construction and gold-plated feet make it extremely stable and quiet, perfect for live performance, recording, and high-sensitivity environments.\u003c\/p\u003e\n\n\u003cp data-start=\"618\" data-end=\"988\" class=\"\"\u003e It is particularly suitable for musicians who want \u003cstrong data-start=\"672\" data-end=\"741\"\u003eto make a very aggressive tube amplifier more manageable\u003c\/strong\u003e , maintaining tonal quality and improving dynamic control. In the clean channels it offers \u003cstrong data-start=\"840\" data-end=\"878\"\u003emore space before saturation\u003c\/strong\u003e , while in the overdrive channels it allows you to \u003cstrong data-start=\"920\" data-end=\"974\"\u003emaintain definition and reduce unwanted compression\u003c\/strong\u003e .\u003c\/p\u003e\n\n \u003cp data-start=\"990\" data-end=\"1245\" class=\"\"\u003e🔊 \u003cstrong data-start=\"993\" data-end=\"1029\"\u003eIdeal for musicians looking for\u003c\/strong\u003e :\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"990\" data-end=\"1245\"\u003e Wider, brighter and less compressed cleans\u003c\/li\u003e\n\n\u003cli data-start=\"990\" data-end=\"1245\"\u003e Greater gain control in saturated channels\u003c\/li\u003e\n\n\u003cli data-start=\"990\" data-end=\"1245\"\u003e Smoother and more progressive response to touch\u003c\/li\u003e\n\n\u003cli data-start=\"990\" data-end=\"1245\"\u003e Silence and reliability even with complex effects or in the studio\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-start=\"1247\" data-end=\"1282\" class=\"\"\u003e 🎸 \u003cstrong data-start=\"1250\" data-end=\"1279\"\u003eRecommended amplifiers\u003c\/strong\u003e :\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"1285\" data-end=\"1393\"\u003e\n\n \u003cstrong data-start=\"1285\" data-end=\"1325\"\u003eFender Blues Junior \/ Hot Rod Deluxe\u003c\/strong\u003e – For improved gain control and more open cleans\u003c\/li\u003e\n\n\u003cli data-start=\"1396\" data-end=\"1490\"\u003e\n\n \u003cstrong data-start=\"1396\" data-end=\"1421\"\u003eMarshall DSL \/ JCM800\u003c\/strong\u003e – Great for smoothing out the early stages and getting more control\u003c\/li\u003e\n\n\u003cli data-start=\"1493\" data-end=\"1585\"\u003e\n\n \u003cstrong data-start=\"1493\" data-end=\"1538\"\u003eMesa\/Boogie Dual Rectifier (Clean Channel)\u003c\/strong\u003e – More headroom and detail in the low end\u003c\/li\u003e\n\n\u003cli data-start=\"1588\" data-end=\"1674\"\u003e\n\n \u003cstrong data-start=\"1588\" data-end=\"1605\"\u003eBoutique amps\u003c\/strong\u003e (e.g. Two Rock, Matchless) – For those who want more nuance and fine dynamics\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-start=\"1676\" data-end=\"1932\" class=\"\"\u003e 🎯 \u003cstrong data-start=\"1679\" data-end=\"1703\"\u003eNote for musicians\u003c\/strong\u003e : \u003cbr data-start=\"1704\" data-end=\"1707\"\u003eThis tube is perfect for intelligently \u003cstrong data-start=\"1737\" data-end=\"1766\"\u003eshaping your sound\u003c\/strong\u003e , reducing the harshness of dynamic peaks and delivering a \u003cstrong data-start=\"1848\" data-end=\"1893\"\u003emore controlled and musical harmonic range\u003c\/strong\u003e , especially in the early pre-amp stages.\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 = -3V\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 = 1200 ; Ia = 1.0 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\u003e \u003c\/span\u003eGm = 1000 ; Ia = 0.8 mA\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGm = 1300 ; Ia = 1.1 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\u003cmeta charset=\"utf-8\"\u003e Low. Tested and approved for use in hi-fi and guitar amplifiers.\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\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\n \u003cstrong\u003eAesthetic condition:\u003c\/strong\u003e Very good – Legible writing with minor signs of aging, no obvious defects. 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 Unreadable – Made by SYLVANIA USA, identifiable by its construction features. 1960s\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003cmeta charset=\"utf-8\"\u003e\u003ca href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" title=\"Why our tubes are different – ​​the VTT protocol that improves sound, reliability and durability\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eFind out why our valves are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":54335194825052,"sku":"02883","price":8800.0,"currency_code":"ALL","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_7024717f-0168-4c70-8071-5984137449f3.jpg?v=1744797980","url":"https:\/\/vacuumtubestreasures.com\/en-al\/products\/5751-12ax7-ecc83-nos-sylvania-%f0%9f%92%8e-gold-brand-gold-pin-disc-getter-amplitrex-tested-tube-made-in-usa","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}