{"product_id":"12dw7-electro-harmonix","title":"12DW7 Electro-Harmonix","description":"\u003cdiv class=\"n6owBd awi2gc\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACAkQAA\"\u003e\n\u003cspan data-subtree=\"aimfl,mfl\"\u003eThe \u003c\/span\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003eElectro-Harmonix 12DW7\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e (also known as the \u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003e7247\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e or \u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003eECC832\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e) is a \u003cmark class=\"b6AQX\" data-wiz-attrbind=\"class=OJiHqb_x\/cFwyDc\" data-sfc-root=\"c\" data-ved=\"2ahUKEwjE44r3vtqXAxWNZ0EAHQovGr8QuJAPegoIAggACAAICRAD\"\u003edual-triode preamp vacuum tube\u003c!--TgQPHd|||[[[null,null,null,null,null,null,null,null,null,null,null,null,[247864,null,0]]]]--\u003e\u003c\/mark\u003e manufactured in Russia at the Xpo-Pul (Reflektor) plant.\u003cspan\u003e [\u003ca href=\"https:\/\/www.amplifiedparts.com\/products\/vacuum-tube-12dw7-electro-harmonix\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/reverb.com\/item\/55558705-electro-harmonix-12dw7-also-ecc832-7247-preamp-vacuum-tube-made-in-russia\"\u003e2\u003c\/a\u003e, \u003ca href=\"https:\/\/www.ebay.com\/itm\/313986068496\"\u003e3\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-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=OJiHqb_17\/fLk2Md\" data-sfc-root=\"c\"\u003eKey Specifications \u0026amp; Design\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=\"2ahUKEwjE44r3vtqXAxWNZ0EAHQovGr8Qi4wTegoIAggACAAIDxAB\" data-hveid=\"CAIIAAgACA8QAQ\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003eDual-Triode Configuration:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Combines two completely different gain sections into a single 9-pin miniature bottle:\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\n\u003cul class=\"XSq4R KI3fJ\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACA8QAw\"\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACA8QBA\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003eSystem 1 (Pins 6, 7, 8):\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e High-gain side with an amplification factor (mu) of \u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003e100\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e, acting as a 12AX7 equivalent.\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=\"CAIIAAgACA8QBQ\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003eSystem 2 (Pins 1, 2, 3):\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Medium-gain side with an amplification factor (mu) of \u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003e20\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e, acting as a 12AU7 equivalent.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/shop.ehx.com\/catalog\/addimages\/12dw7eh.pdf\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/www.amplifiedparts.com\/products\/vacuum-tube-12dw7-electro-harmonix\"\u003e2\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=\"2ahUKEwjE44r3vtqXAxWNZ0EAHQovGr8Qi4wTegoIAggACAAIDxAK\" data-hveid=\"CAIIAAgACA8QCg\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003eHeater Ratings:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Supports series (12.6V, 0.15A) or parallel (6.3V, 0.30A) heater configurations.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/shop.ehx.com\/catalog\/addimages\/12dw7eh.pdf\"\u003e1\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=\"2ahUKEwjE44r3vtqXAxWNZ0EAHQovGr8Qi4wTegoIAggACAAIDxAQ\" data-hveid=\"CAIIAAgACA8QEA\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003eMaximum Plate Voltage:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 330V.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/shop.ehx.com\/catalog\/addimages\/12dw7eh.pdf\"\u003e1\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=\"2ahUKEwjE44r3vtqXAxWNZ0EAHQovGr8Qi4wTegoIAggACAAIDxAW\" data-hveid=\"CAIIAAgACA8QFg\"\u003e\n\u003cspan class=\"iNqyIf\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\"\u003e\u003cspan class=\"yADgie\"\u003eBalancing Note:\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003cspan class=\"yADgie\"\u003e Because the two sides have asymmetric gain factors, the tube cannot be internally balanced.\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/www.ebay.com\/itm\/166611383312\"\u003e1\u003c\/a\u003e]\u003c\/span\u003e\n\u003c\/div\u003e","brand":"Electro-Harmonix","offers":[{"title":"Default Title","offer_id":67889668325455,"sku":null,"price":770.0,"currency_code":"ZAR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0669\/4354\/9519\/files\/images_13057008-a5e9-4a8b-a2e4-f96a315fd67e.jpg?v=1793114183","url":"https:\/\/theoldstockroom.com\/products\/12dw7-electro-harmonix","provider":"The Old Stockroom","version":"1.0","type":"link"}