{"product_id":"12av7-nos-nib-tung-sol-for-selectron-black-wing-plates-horse-shoe-getter-tested-tube-made-in-usa-50s","title":"12AV7 NOS NIB Tung-Sol for Selectron Tested Tube – Black Wing Plates USA 1950s","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003e12AV7 NOS NIB TUNG-SOL for SELECTRON Black Wing Plates Horse Shoe Getter Tested Tube\u003c\/strong\u003e \u003cstrong\u003eMade in USA '50s\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e These tubes, manufactured in the United States in the 1950s, are prized for their full-bodied, detailed sound, with a tonal characteristic that combines warmth and precision. The black \"wing\" plates give these tubes a rich, deep sound, particularly suited to those seeking musical reproduction with a strong presence in the low and midrange.\u003c\/p\u003e\n\u003cp\u003e The bass is rounded and powerful, providing a solid foundation without ever being overpowering. The midrange is extremely detailed, with a natural warmth that makes vocals and acoustic instruments particularly vivid and engaging. Compared to the gray plate versions, the Black Wing Plates offer greater depth and body in the sound, without sacrificing clarity or transparency.\u003c\/p\u003e\n\u003cp\u003e High frequencies are smooth and fluid, thanks to the Horse Shoe Getter design, which helps maintain balanced reproduction without fatigue. Even on the most complex recordings, these tubes ensure a wide, three-dimensional soundstage, with excellent instrument separation and remarkable depth.\u003c\/p\u003e\n\u003cp\u003e Compared to other tubes of the same period, such as Sylvania, Tung-Sol Black Wing Plates are distinguished by a more authoritative sound character and greater dynamic impact, while maintaining refined musicality. These tubes are an excellent choice for those seeking warm, dynamic sound reproduction with considerable depth.\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eManufactured by TUNG-SOL - USA for SELECTRON.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e Tested on \u003cstrong\u003eAMPLITREX AT-1000\u003c\/strong\u003e Tube tester:\u003cbr\u003e \u003cspan\u003eVoltage Test: Va = 150V, Vg = -1V\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eAverage 100% Gm = 8.5 ; Ia = 18 mA\u003c\/span\u003e\u003cbr\u003e \u003cstrong\u003eTEST RESULT: VERY STRONG\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e Section 1: Gm = 8.6 ; Ia = 18 mA\u003cbr\u003e Section 2: Gm = 9.2 ; Ia = 19 mA\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eFurther tests performed:\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eMicrophone Test\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eEmission Quality\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eShort Circuit Test\u003c\/span\u003e\u003cbr\u003e GAS Test\u003cspan\u003e\u003c\/span\u003e\u003c\/p\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\u003eFind out why our valves are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"TUNG-SOL","offers":[{"title":"Default Title","offer_id":49486163378524,"sku":"02472R","price":1700.0,"currency_code":"ALL","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_78c8fc67-382c-457d-a79d-4a61af53f019.jpg?v=1728121324","url":"https:\/\/vacuumtubestreasures.com\/en-al\/products\/12av7-nos-nib-tung-sol-for-selectron-black-wing-plates-horse-shoe-getter-tested-tube-made-in-usa-50s","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}