{"product_id":"telefunken-ecc81","title":"Telefunken ECC81 (12AT7)","description":"\u003cdiv class=\"ZLzG0d ncoeY E8xBUb\" role=\"heading\" aria-level=\"3\" data-animation-nesting=\"\" data-sfc-cp=\"\" data-wiz-attrbind=\"aria-level=LFYVQe_13\/fLk2Md\" data-sfc-root=\"ep\" data-epip=\"\" data-complete=\"true\"\u003eExtremely Rare \/ \"Holy Grail\"\u003c\/div\u003e\n\u003cdiv class=\"ZLzG0d ncoeY E8xBUb\" role=\"heading\" aria-level=\"3\" data-animation-nesting=\"\" data-sfc-cp=\"\" data-wiz-attrbind=\"aria-level=LFYVQe_13\/fLk2Md\" data-sfc-root=\"ep\" data-epip=\"\" data-complete=\"true\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"ZLzG0d ncoeY E8xBUb\" role=\"heading\" aria-level=\"3\" data-animation-nesting=\"\" data-sfc-cp=\"\" data-wiz-attrbind=\"aria-level=LFYVQe_13\/fLk2Md\" data-sfc-root=\"ep\" data-epip=\"\" data-complete=\"true\"\u003eKey Characteristics \u0026amp; Identification\u003c!--TgQPHd|||[[2,[null,null,null,null,null,null,null,null,null,null,null,null,[351768,null,0]],[],null,1]]--\u003e\n\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-ved=\"2ahUKEwiwybq95cWXAxU_VUEAHZrEEDYQi4wTegoIAggACAAIFRAA\" data-hveid=\"CAIIAAgACBUQAA\" data-complete=\"true\"\u003e\n\u003cul class=\"XSq4R KI3fJ\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-hveid=\"CAIIAAgACBUQAQ\" data-complete=\"true\"\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-hveid=\"CAIIAAgACBUQAg\" data-complete=\"true\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-complete=\"true\"\u003eDesign\/Type:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 9-pin Noval double-triode, functioning as a low-gain to medium-gain preamp or phase inverter valve.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/www.hotroxuk.com\/matched-valves-links-page-12ax7-6l6-909-0\/all-12at7-ecc81.html?srsltid=AU7gw4VHJVmc3beay0_dVwPBUhAepqq9lM17gKDkhLpcV5pYyBtzdXAS\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/www.tubeampdoctor.com\/en\/ecc81-telefunken\/rft-nos\"\u003e2\u003c\/a\u003e]\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-hveid=\"CAIIAAgACBUQBw\" data-complete=\"true\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-complete=\"true\"\u003eThe Diamond Mark:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Authentic West German Telefunken ECC81 tubes feature a small diamond-shaped mold indentation molded into the glass base between the pins (\"diamond bottom\").\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/www.ebay.com\/itm\/206150944888\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/www.diyaudio.com\/community\/threads\/identifying-telefunken-tubes.369123\/\"\u003e2\u003c\/a\u003e]\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-hveid=\"CAIIAAgACBUQDA\" data-complete=\"true\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-complete=\"true\"\u003eSonic Signature:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Known for pronounced, silky highs and great micro-detail, though some users note the mid-range can sound slightly leaner or more neutral compared to warmer tubes like Mullard.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/www.lencoheaven.net\/forum\/index.php?topic=568.0\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/gearspace.com\/threads\/korby-audio-kat-tubes-telefunken-or-what.418521\/\"\u003e2\u003c\/a\u003e]\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-hveid=\"CAIIAAgACBUQEQ\" data-complete=\"true\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-epip=\"\" data-complete=\"true\"\u003eRFT \/ East German Alternatives:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Post-production or eastern-block equivalents were produced by RFT in East Germany for Telefunken after original West German lines closed, which lack the glass-bottom diamond logo.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/www.tubeampdoctor.com\/en\/ecc81-telefunken\/rft-nos\"\u003e1\u003c\/a\u003e]\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Telefunken","offers":[{"title":"Default Title","offer_id":67790826045519,"sku":null,"price":1800.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0669\/4354\/9519\/files\/images_a8c53f8c-8be8-4a95-a807-ded13ff792c9.jpg?v=1792403287","url":"https:\/\/theoldstockroom.com\/products\/telefunken-ecc81","provider":"The Old Stockroom","version":"1.0","type":"link"}