{"product_id":"12ax7-ecc83-sylvania-long-gray-plates-square-getter-tested-tube-made-in-usa-49","title":"12AX7 ECC83 Baldwin by Sylvania Long Gray Plates Square Getter Tested Tube USA","description":"\u003cp\u003e\u003cstrong\u003e12AX7 ( ECC83 ) Baldwin by SYLVANIA Long Gray plates Square Getter Tested Tube Made in USA\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e \u003cstrong\u003eDescription:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003e This \u003cstrong\u003eBaldwin 12AX7 (ECC83)\u003c\/strong\u003e , manufactured by \u003cstrong\u003eSylvania\u003c\/strong\u003e and selected for use in Baldwin organs, features \u003cstrong\u003eLong Gray Plates and a Square Getter\u003c\/strong\u003e , a configuration that contributes to its distinctive sonic signature. Its sound is \u003cstrong\u003ewarm, full, and rich in harmonics\u003c\/strong\u003e , with excellent musicality and a vintage character typical of early Sylvania production.\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eLow range:\u003c\/strong\u003e \u003cstrong\u003eFull-bodied and deep\u003c\/strong\u003e , with good presence and articulation. The bass is slightly broader than on later productions, providing a solid foundation without being intrusive.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eMidrange:\u003c\/strong\u003e \u003cstrong\u003eWarm, smooth, and harmonically rich\u003c\/strong\u003e , with a slight emphasis on the lower mids for a full, enveloping sound. Vocals and acoustic instruments emerge with naturalness and presence.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eHighs:\u003c\/strong\u003e \u003cstrong\u003eSmooth and rounded\u003c\/strong\u003e , with a controlled brilliance. There are no harshness or annoying peaks, making it perfect for extended listening sessions without fatigue.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eDynamics and three-dimensionality:\u003c\/strong\u003e \u003cstrong\u003eExpressive and musical\u003c\/strong\u003e , with a wide soundstage and very pleasant instrument separation. The stereo image is stable and well-structured, with a very natural three-dimensional rendering.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e This \u003cstrong\u003e12AX7 Baldwin by Sylvania\u003c\/strong\u003e is an excellent choice for those looking for \u003cstrong\u003ea rich, warm, vintage sound\u003c\/strong\u003e , ideal for \u003cstrong\u003ehi-fi\u003c\/strong\u003e applications, where it enhances systems with natural, velvety tones, and for \u003cstrong\u003eguitar amplifiers\u003c\/strong\u003e , where it offers \u003cstrong\u003enatural compression and harmonious saturation\u003c\/strong\u003e , perfect for blues and jazz.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e \u003cstrong\u003eTest Results:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp\u003e Valve tested on \u003cstrong\u003eAMPLITREX AT-1000\u003c\/strong\u003e Tube Tester:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\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\u003cp\u003e \u003cstrong\u003eValve:\u003c\/strong\u003e\u003c\/p\u003e\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 = 1300 ; Ia = 0.8 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e \u003cstrong\u003eConditions:\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eCosmetic Condition:\u003c\/strong\u003e \u003cspan\u003eVintage Tubes - Tested and Working - In our custom box.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eFunctionality:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFully operational.\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eIdeal for\u003c\/span\u003e \u003cstrong\u003ehi-fi preamplifiers, phase reversal stages and musical instrument amplifiers\u003c\/strong\u003e \u003cspan\u003e.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003eAesthetic Condition:\u003c\/strong\u003e Excellent (See Photos).\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eThe writing is in good condition.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eManufacturing Code:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e312 939 - SYLVANIA 39th week of 1959\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"SYLVANIA","offers":[{"title":"Default Title","offer_id":53935193424220,"sku":"02743","price":29.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_fb04fc79-3b8b-4bce-b6e1-fe93dc73f9a1.jpg?v=1738946209","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/12ax7-ecc83-sylvania-long-gray-plates-square-getter-tested-tube-made-in-usa-49","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}