{"product_id":"6v6gt-delco-by-sylvania-black-plate-smoked-glass-foil-getter-amplitrex-tested-tube-usa-1952","title":"6V6GT DELCO by Sylvania Black Plate Smoked Glass Foil Getter AMPLITREX Tested Tube USA 1952","description":"\u003ch3\u003e\u003cstrong\u003e6V6GT DELCO by Sylvania Black Plate Smoked Glass Foil Getter Tube Made in USA 1952\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eAMPLITREX Tested –\u003cspan\u003e VERY STRONG - Vintage American Sylvania Production\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eTube tested on \u003cstrong\u003eAMPLITREX AT-1000 \u003c\/strong\u003eTube Tester:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e\u003cspan\u003e \u003cmeta charset=\"utf-8\"\u003eVa = 250V; Vg2 = 250V; Vg = -12.5V \u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e100% Average:\u003c\/strong\u003e\u003cspan\u003e \u003cmeta charset=\"utf-8\"\u003eGm = 4.1 ; Ia = 45 mA\u003c\/span\u003e\n\n\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\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eTube :\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eGm = 3.97 ; Ia = 40.4 mA\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cstrong\u003eAdditional tests performed:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Low. Tested and confirmed for use in hi-fi equipment and guitar amplifiers, including the most sensitive audio stages.\u003c\/span\u003e\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\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAuthentic \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e6V6GT Delco Made in USA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, marketed under the historic Delco brand and manufactured by \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSylvania Electric Products Inc.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e at the Emporium, Pennsylvania plant. An interesting American private-label production from the early fifties, capable of combining the charm of the Delco marking with the build quality of the famous Sylvania 6V6GTs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe code \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e312 213\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e unmistakably identifies Sylvania and dates the manufacture to the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e13th week of 1952\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. The tube features one of the most appreciated configurations of the period: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eblack plate, smoked glass, and foil getter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, accompanied by the large yellow Delco marking on the base and the 6V6GT label still clearly visible on the glass.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTested on \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAmplitrex AT-1000\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, it recorded \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGm 3.97 mA\/V and Ia 40.4 mA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. The transconductance reaches approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e97% of the nominal value\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, while the plate current stands at around \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e90% of the reference\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: results that confirm \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003estrong, regular, and stable\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e emission, particularly valid for a production dating back to 1952.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe tube passed all checks without showing fluctuations, gas, or shorts. The \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003elow microphonics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e allow for its use in hi-fi amplifiers, guitar amplifiers, and other vintage equipment compatible with the 6V6GT.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn terms of sound, Sylvania black plates from this era are generally appreciated for an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eopen, dynamic, and natural\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e presentation, with well-articulated mids, controlled low frequencies, and a defined high end. A musical and energetic performance, suitable both for single-ended configurations and as an element to complete a matched pair.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis is a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eused, tested, and perfectly functioning vintage tube\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. The markings are excellently preserved and the aesthetic condition is excellent, with only minimal signs of age. It is supplied in a custom Vacuum Tubes Treasures box.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA 1952 6V6GT of particular historical and collectible interest, enhanced by \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eDelco branding, authentic Sylvania black plate construction, and still very solid Amplitrex performance\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\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\u003eStatus:\u003c\/strong\u003e Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eFunctionality:\u003c\/strong\u003e Perfectly operational.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eAesthetic Condition:\u003c\/strong\u003e Excellent – Lettering excellently preserved, minimal signs of age. See photos for details.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e 312 213 → 312 Sylvania Electric Products Inc., Emporium, Pa. - 213 → 2 (from three digits) → 1952 - 13 → 13th week of the year\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\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\u003eDiscover why our tubes are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"RAYTHEON","offers":[{"title":"Default Title","offer_id":59268806672732,"sku":"03840T","price":318.0,"currency_code":"RON","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_5c21bcb2-808f-4446-9fa8-9207636a64ab.jpg?v=1790266701","url":"https:\/\/vacuumtubestreasures.com\/en-ro\/products\/6v6gt-delco-by-sylvania-black-plate-smoked-glass-foil-getter-amplitrex-tested-tube-usa-1952","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}