{"product_id":"6sn7gtb-baldwin-by-sylvania-tested-balanced-tube-black-plates-halo-getter-made-in-usa-61","title":"6SN7GTB Baldwin by SYLVANIA Tested Balanced Tube Black Plates Halo Getter Made in USA '61","description":"\u003cp class=\"p1\"\u003e\u003cb\u003e6SN7GTB Baldwin by SYLVANIA – Tested Balanced Tube – Black Plates – Halo Getter – Made in USA ’61\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eAMPLITREX Tested – VERY STRONG – Balanced Sections – Vintage American Sylvania Production\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eSingle tube \u003cspan class=\"s1\"\u003e\u003cb\u003e6SN7GTB Baldwin by Sylvania\u003c\/b\u003e\u003c\/span\u003e, \u003cspan class=\"s1\"\u003e\u003cb\u003eMade in USA 1961\u003c\/b\u003e\u003c\/span\u003e production, selected for compatible hi-fi and musical applications that require stability, good electrical performance, and authentic vintage Sylvania sonic character.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eThe construction is typical Sylvania for the era, with \u003cspan class=\"s1\"\u003e\u003cb\u003eblack plates\u003c\/b\u003e\u003c\/span\u003e, top \u003cspan class=\"s1\"\u003e\u003cb\u003ehalo getter\u003c\/b\u003e\u003c\/span\u003e, \u003cspan class=\"s1\"\u003e\u003cb\u003etop getter flashing\u003c\/b\u003e\u003c\/span\u003e, black base, and well-preserved green Baldwin silkscreen. General aesthetic conditions are excellent, with minimal signs consistent with age and vintage use. See photos for details.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eThe tube has been tested on an \u003cspan class=\"s1\"\u003e\u003cb\u003eAmplitrex AT-1000 Tube Tester\u003c\/b\u003e\u003c\/span\u003e with a \u003cspan class=\"s1\"\u003e\u003cb\u003eVERY STRONG\u003c\/b\u003e\u003c\/span\u003e result and features \u003cspan class=\"s1\"\u003e\u003cb\u003ebalanced sections\u003c\/b\u003e\u003c\/span\u003e, an interesting characteristic for circuits where the internal consistency of the double triode is an important element.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eMicrophonics are \u003cspan class=\"s1\"\u003e\u003cb\u003estandard\u003c\/b\u003e\u003c\/span\u003e level, suitable for normal hi-fi and compatible musical applications. The tube is fully functional, stable, and free of short circuits or gas.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eFrom a sonic perspective, it offers a full, stable, and musically balanced rendition, with controlled bass, natural mids, clean highs, and an organized soundstage. The character is typical of vintage American Sylvania production: solid, fluid, and well-defined.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eSuitable for preamplifiers, driver stages, phase splitters, and circuits compatible with \u003cspan class=\"s1\"\u003e\u003cb\u003e6SN7 \/ 6SN7GTB\u003c\/b\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eA truly tested vintage American tube from Vacuum Tubes Treasures, ideal for those seeking a strong, balanced \u003cspan class=\"s1\"\u003e\u003cb\u003e6SN7GTB Baldwin by Sylvania\u003c\/b\u003e\u003c\/span\u003e with an authentic sonic character.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTubes tested on \u003cstrong\u003eAmplitrex AT-1000 Tube tester\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e Va = 250V, Vg = -8V\u003c\/li\u003e\n\n\u003cli\u003e\u003cstrong\u003eAverage 100% Gm = 2600 ; Ia = 9.0 mA\u003c\/strong\u003e\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTube #22:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eSection 1: Gm = 2500 ; Ia = 9.0 mA\u003c\/li\u003e\n\n\u003cli\u003eSection 2: Gm = 2500 ; Ia = 9.4 mA\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cstrong\u003eAdditional Tests Performed:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMicrophonics\u003c\/strong\u003e: Standard. Tested and suitable for use in hi-fi and guitar amplifiers. Recommended for use in V2, V3, V4, as a driver or in less critical stages. Not recommended for V1 or in very high-gain positions particularly sensitive to microphonics.\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eEmission Quality:\u003c\/strong\u003e Excellent – Very strong and stable emission, without fluctuations.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eShorts and GAS:\u003c\/strong\u003e Absent.\u003c\/span\u003e\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Vintage Tube - Tested and fully functional. 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\u003ePerfectly operational.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCosmetic Condition:\u003c\/strong\u003e\u003cspan\u003e Excellent – Markings well-preserved, minimal signs of age. See photos for details.\u003c\/span\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e 312 113 - 312 → Sylvania Electric Products Inc., Emporium, Pa. - 113 → 1 (out of three digits) → 1961 - 13 → 13th week of the year\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca rel=\"noopener noreferrer\" 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":"SYLVANIA","offers":[{"title":"Default Title","offer_id":58157911441756,"sku":"03697","price":39.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_e91a3964-d259-408a-947e-8fa8a80ac599.jpg?v=1782742675","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/6sn7gtb-baldwin-by-sylvania-tested-balanced-tube-black-plates-halo-getter-made-in-usa-61","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}