{"product_id":"7591a-tungsol","title":"7591A Tungsol","description":"\u003cdiv class=\"n6owBd awi2gc\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACAoQAA\" data-complete=\"true\"\u003e\n\u003cspan data-subtree=\"aimfl,mfl\"\u003eThe \u003c\/span\u003e\u003cspan data-sfc-cp=\"\" data-sfc-root=\"c\" data-wiz-uids=\"hZ28ib_r\" data-complete=\"true\" data-sfc-inited=\"2\"\u003e\u003cspan class=\"R78TQ\"\u003e\u003cspan data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\" data-sfc-inited=\"2\"\u003e\u003ca class=\"gQWhZ\" rel=\"noopener\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-ved=\"2ahUKEwjvtrzm49mXAxUzUUEAHZjyNe4Qy_kOegoIAggACAAIChAB\" data-hveid=\"CAIIAAgACAoQAQ\" href=\"https:\/\/shop.ehx.com\/item\/7591A%20TUNGSOL\" data-complete=\"true\" target=\"_blank\"\u003eTung-Sol 7591A\u003c!--TgQPHd|||[]--\u003e\u003c\/a\u003e\u003c!--TgQPHd|||[[[null,null,null,null,null,null,[[1793089736743791,4280627,3996512920],null,null,null,null,[[2,0,0,8]]],\u0026quot;https:\/\/shop.ehx.com\/item\/7591A%20TUNGSOL\u0026quot;],0,0],\u0026quot;\\u0026hZ28ib_q:u9afN\u0026quot;,\u0026quot;\\u0026hZ28ib_q:kEV45c\u0026quot;]--\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[[\u0026quot;https:\/\/shop.ehx.com\/item\/7591A%20TUNGSOL\u0026quot;,null,null,[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,[{\u0026quot;1218\u0026quot;:[16,null,null,null,[1]]}]],16,null,\u0026quot;Tung-Sol 7591A Power Tube - Electro\u0026quot;,\u0026quot;Tung-Sol 7591A Premium power beam tetrode, a faithful replica of the original NOS tubes with a very detailed soundstage. Perfect for vintage amplifier applications, both Hifi and guitar. • Used in vintage Fisher, Scott, McIntosh receivers among others • Also for vintage Gibson \\u0026 Ampeg guitar amps • Tung-Sol tubes reflect the best in vintage construction with unsurpassed tone and reliability. See matched version: https:\/\/shop.ehx.com\/item\/7591A%20TUNGSOLPL Tube Specs: http:\/\/shop.ehx.com\/catalog\/tubes-specs\/7591A%20TS.pdf Power Tube Country of Origin: RUSSIA Catalog Sections\u0026quot;,\u0026quot;https:\/\/encrypted-tbn3.gstatic.com\/images?q\\u003dtbn:ANd9GcQIerN5tqaE1Ds2sAaEIfKDAjL2T0_DzbS_qrVvdI7QAHCE_7BAjGHEJTKcnbcOKqoyJ0ZaMmVR2UrThxY\u0026quot;,\u0026quot;Electro-Harmonix\u0026quot;,\u0026quot;https:\/\/encrypted-tbn0.gstatic.com\/faviconV2?url\\u003dhttps:\/\/shop.ehx.com\\u0026client\\u003dAIM\\u0026size\\u003d128\\u0026type\\u003dFAVICON\\u0026fallback_opts\\u003dTYPE,SIZE,URL\u0026quot;,[[1793089736743791,4280627,3996512920],null,null,null,null,[[2,0,0,8]]],null,\u0026quot;d8fe808f-b615-48dd-8ffc-6386627ed111\u0026quot;]]--\u003e\u003c\/span\u003e is a \u003cmark class=\"b6AQX\" data-wiz-attrbind=\"class=hZ28ib_u\/cFwyDc\" data-sfc-root=\"c\" data-ved=\"2ahUKEwjvtrzm49mXAxUzUUEAHZjyNe4QuJAPegoIAggACAAIChAC\" data-complete=\"true\"\u003ecurrent-production beam power tetrode vacuum tube\u003c!--TgQPHd|||[[[null,null,null,null,null,null,null,null,null,null,null,null,[247864,null,0]]]]--\u003e\u003c\/mark\u003e designed as a faithful replica of the rare vintage NOS (New Old Stock) 7591\/7591A.\u003cspan\u003e [\u003ca href=\"https:\/\/www.tubeampdoctor.com\/en\/tung-sol-7591a\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/shop.ehx.com\/item\/7591A%20TUNGSOL\"\u003e2\u003c\/a\u003e]\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"yhAwj\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\" data-sfc-inited=\"2\"\u003e\u003c!--TgQPHd|||[]--\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=hZ28ib_13\/fLk2Md\" data-sfc-root=\"c\" data-complete=\"true\"\u003eOverview \u0026amp; Specifications\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=\"c\" data-ved=\"2ahUKEwjvtrzm49mXAxUzUUEAHZjyNe4Qi4wTegoIAggACAAIFBAB\" data-hveid=\"CAIIAAgACBQQAQ\" data-complete=\"true\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eTube Type:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Beam power tetrode \/ pentode with an 8-pin octal base.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/shop.ehx.com\/catalog\/tubes-specs\/7591A%20TS.pdf\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/shop.ehx.com\/item\/7591A%20TUNGSOL\"\u003e2\u003c\/a\u003e]\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-ved=\"2ahUKEwjvtrzm49mXAxUzUUEAHZjyNe4Qi4wTegoIAggACAAIFBAH\" data-hveid=\"CAIIAAgACBQQBw\" data-complete=\"true\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eCountry of Origin:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Russia (manufactured by New Sensor \/ Electro-Harmonix family).\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/www.ebay.com\/itm\/256215506308\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/shop.ehx.com\/item\/7591A%20TUNGSOL\"\u003e2\u003c\/a\u003e]\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-ved=\"2ahUKEwjvtrzm49mXAxUzUUEAHZjyNe4Qi4wTegoIAggACAAIFBAN\" data-hveid=\"CAIIAAgACBQQDQ\" data-complete=\"true\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eKey Electrical Parameters:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\n\u003cul class=\"XSq4R KI3fJ\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACBQQDw\" data-complete=\"true\"\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACBQQEA\" data-complete=\"true\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eFilament Voltage:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 6.3V (Heater current ~0.7–0.9A)\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACBQQEQ\" data-complete=\"true\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eMaximum Plate Dissipation:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 19.0 Watts\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACBQQEg\" data-complete=\"true\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eMaximum Screen Dissipation:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 3.3 Watts\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACBQQEw\" data-complete=\"true\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eMaximum Plate Voltage:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 440 Volts\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACBQQFA\" data-complete=\"true\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eTransconductance:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e ~10,200 μmhos\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/shop.ehx.com\/catalog\/addimages\/7591.pdf\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/www.ebay.com\/itm\/116325346004\"\u003e2\u003c\/a\u003e, \u003ca href=\"https:\/\/shop.ehx.com\/catalog\/tubes-specs\/7591A%20TS.pdf\"\u003e3\u003c\/a\u003e]\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/ul\u003e\n\u003c!--TgQPHd|||[]--\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-ved=\"2ahUKEwjvtrzm49mXAxUzUUEAHZjyNe4Qi4wTegoIAggACAAIFBAZ\" data-hveid=\"CAIIAAgACBQQGQ\" data-complete=\"true\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eSound \u0026amp; Performance:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Known for smooth, punchy tonal qualities, a detailed soundstage, rich mid-range warmth, and very stable bias characteristics.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/www.ebay.com\/shop\/7591a-tube?_nkw=7591a+tube\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/audiokarma.org\/forums\/threads\/tung-sol-7591a-tests.625099\/\"\u003e2\u003c\/a\u003e, \u003ca href=\"https:\/\/shop.ehx.com\/item\/7591A%20TUNGSOL\"\u003e3\u003c\/a\u003e]\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cul class=\"XSq4R KI3fJ\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACBQQAA\" data-complete=\"true\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/ul\u003e\n\u003cdiv class=\"yhAwj\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\" data-sfc-inited=\"2\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-ved=\"2ahUKEwjvtrzm49mXAxUzUUEAHZjyNe4Qi4wTegoIAggACAAIGBAA\" data-hveid=\"CAIIAAgACBgQAA\" data-complete=\"true\"\u003e\n\u003cdiv class=\"ZLzG0d ncoeY E8xBUb\" role=\"heading\" aria-level=\"3\" data-animation-nesting=\"\" data-sfc-cp=\"\" data-wiz-attrbind=\"aria-level=hZ28ib_2x\/fLk2Md\" data-sfc-root=\"c\" data-complete=\"true\"\u003eCommon Applications \u0026amp; Compatibility\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\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-ved=\"2ahUKEwjvtrzm49mXAxUzUUEAHZjyNe4Qi4wTegoIAggACAAIGRAA\" data-hveid=\"CAIIAAgACBkQAA\" data-complete=\"true\"\u003e\n\u003cdiv class=\"n6owBd awi2gc\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACBkQAQ\" data-complete=\"true\"\u003eThe Tung-Sol 7591A is widely used in vintage Hi-Fi home audio receivers and amplifiers, as well as vintage guitar amplifiers:\u003cspan\u003e [\u003ca href=\"https:\/\/www.ebay.com\/shop\/7591a-tube?_nkw=7591a+tube\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/shop.ehx.com\/item\/7591A%20TUNGSOL\"\u003e2\u003c\/a\u003e]\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv data-bfc=\"\" class=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-ved=\"2ahUKEwjvtrzm49mXAxUzUUEAHZjyNe4Qi4wTegoIAggACAAIHBAB\" data-hveid=\"CAIIAAgACBwQAQ\" data-complete=\"true\"\u003e\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eHi-Fi Brands\/Models:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e","brand":"Tungsol","offers":[{"title":"Default Title","offer_id":67887518580815,"sku":null,"price":900.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0669\/4354\/9519\/files\/images_4ec489aa-d861-4b1a-913f-49005d5d5842.jpg?v=1793089823","url":"https:\/\/theoldstockroom.com\/products\/7591a-tungsol","provider":"The Old Stockroom","version":"1.0","type":"link"}