{"product_id":"7247-12dw7-mullard-blackburn-o-getter-matched-tubes-made-in-gt-britain-1","title":"7247 ( 12DW7 ) MULLARD Blackburn O Getter Matched Tubes Made in GT. BRITAIN","description":"\u003cp\u003e\u0026nbsp;\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7247 ( 12DW7 ) MULLARD Blackburn O Getter Matched Tubes\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eMADE IN GT. BRITAIN\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eProduced by MULLARD UK in the Blackburn factory for HAMMOND USA.\u003cbr\u003eLogos worn as per photo\u003c\/p\u003e\n\u003cp\u003eThe offer is for a \"Matched Pair\u003cbr\u003e\u003cstrong\u003eTested on AMPLITREX AT-1000 Tube tester:\u003c\/strong\u003e\u003cbr\u003eVoltage Test:\u003cbr\u003eVa = 250V, Vg = -8,5V\u003cbr\u003eVa = 250V, Vg = -2V\u003cbr\u003eAverage 100% Gm = 2.2 ; Ia = 10.5 mA\u003cbr\u003eAverage 100% Gm = 1.6 ; t471\u0026gt;TEST RESULT: VERY STRONG\u003c\/p\u003e\n\u003cp\u003eValve 1:\u003cbr\u003eSection 1: Gm = 2.0 ; Ia = 9.6 mA\u003cbr\u003eSection 2: Gm = 1.9 ; Ia = 1.2 mA\u003cbr\u003eValve 2:\u003cbr\u003eSection 1: Gm = 2.1 ; Ia = 10.6 mA\u003cbr\u003eSection 2: Gm = 1.7 ; Ia = 1.0 mA\u003c\/p\u003e\n\u003cp\u003eFurther tests performed:\u003cbr\u003eMicrophony Test\u003cbr\u003eEmission Quality\u003cbr\u003eShort Circuit Test\u003cbr\u003eGAS Test\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"Why our tubes are different – the VTT protocol that improves sound, reliability and durability\" href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" target=\"_blank\"\u003e\u003cstrong\u003eFind out why our valves are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"MULLARD","offers":[{"title":"Default Title","offer_id":48689932173660,"sku":"02186X","price":79.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/3_48fa86e4-8e47-4f35-b305-f7ccf93b0f46.jpg?v=1715681192","url":"https:\/\/vacuumtubestreasures.com\/en-hr\/products\/7247-12dw7-mullard-blackburn-o-getter-matched-tubes-made-in-gt-britain-1-en","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}