{"product_id":"rca-6sn7gtb-nos-woth-boxes","title":"RCA 6SN7GTB NOS with boxes","description":"\u003cdiv class=\"ZLzG0d ncoeY E8xBUb\" role=\"heading\" aria-level=\"3\" data-animation-nesting=\"\" data-sfc-cp=\"\" data-wiz-attrbind=\"aria-level=UZGUvf_15\/fLk2Md\" data-sfc-root=\"c\" data-complete=\"true\"\u003eKey Characteristics \u0026amp; Sound Profile\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=\"2ahUKEwiOnMDA4ciXAxUhTkEAHQDqEpwQi4wTegoIAggACAAIFhAA\" data-hveid=\"CAIIAAgACBYQAA\" data-complete=\"true\"\u003e\n\u003cul class=\"XSq4R KI3fJ\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACBYQAQ\" data-complete=\"true\"\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACBYQAg\" 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 Octal (8-pin) dual triode.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/www.moon-audio.com\/products\/ge-6sn7gtb-white\"\u003e1\u003c\/a\u003e]\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACBYQBw\" 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\"\u003eConstruction:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Commonly features black plates (often with side-getter or bottom D-getter configurations) manufactured in the USA.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/www.audiotubes.com\/6sn7.htm\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/www.ebay.com\/shop\/rca-6sn7gtb?_nkw=rca+6sn7gtb\"\u003e2\u003c\/a\u003e]\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACBYQDA\" 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\"\u003eSonic Signature:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Audiophiles often describe 1950s RCA GTB variants as offering a \u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003ewarm, smooth, and relaxed presentation\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e with rich tones, contrasting with the brighter or more forward characteristics of brands like Sylvania.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/www.enjoythemusic.com\/magazine\/equipment\/0304\/6sn7.htm\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/www.whatsbestforum.com\/threads\/6sn7gtb.29066\/\"\u003e2\u003c\/a\u003e, \u003ca href=\"https:\/\/www.ebay.com\/shop\/rca-6sn7gtb?_nkw=rca+6sn7gtb\"\u003e3\u003c\/a\u003e]\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACBYQEQ\" 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\"\u003eEquivalence:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e The \"GTB\" designation indicates controlled-warm-up performance and shares common electrical compatibility with family variants like the 6SN7GT, 6SN7GTA, and VT-231 (though subtle internal geometry and midrange nuances can vary by decade and era).\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/www.tubeampdoctor.com\/en\/tubes-accessoires\/tubes\/preamp-doubletriodes\/6sl7-6sn7\/\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/forums.stevehoffman.tv\/threads\/rca-6sn7gtb-opinion.68105\/\"\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\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 data-bfc=\"\" class=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-ved=\"2ahUKEwiOnMDA4ciXAxUhTkEAHQDqEpwQi4wTegoIAggACAAIGxAA\" data-hveid=\"CAIIAAgACBsQAA\" 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=UZGUvf_2f\/fLk2Md\" data-sfc-root=\"c\" data-complete=\"true\"\u003eAvailability \u0026amp; Pricing\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=\"2ahUKEwiOnMDA4ciXAxUhTkEAHQDqEpwQi4wTegoIAggACAAIIhAA\" data-hveid=\"CAIIAAgACCIQAA\" data-complete=\"true\"\u003e\n\u003cul class=\"XSq4R KI3fJ\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACCIQAQ\" data-complete=\"true\"\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACCIQAg\" 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\"\u003eNew Old Stock (NOS) \/ Used:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Because RCA stopped making these vintage glass tubes decades ago, they are sourced on the secondary and collector market (such as eBay, Etsy, and specialty tube vendors like TubeDepot).\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/www.tubedepot.com\/products\/rca-6sn7gt-gtb-black-plate\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/www.etsy.com\/market\/rca_6sn7gtb_tubes\"\u003e2\u003c\/a\u003e, \u003ca href=\"https:\/\/www.ebay.com\/shop\/rca-6sn7gtb?_nkw=rca+6sn7gtb\"\u003e3\u003c\/a\u003e]\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-hveid=\"CAIIAAgACCIQBw\" 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\"\u003eCost Range:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Single tested or used RCA 6SN7GTB tubes typically range from about $20 to $50 depending on test strength, while matched pairs or NOS boxed sets can range from $50 to over $120+.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e [\u003ca href=\"https:\/\/www.etsy.com\/market\/rca_6sn7gtb_tubes\"\u003e1\u003c\/a\u003e, \u003ca href=\"https:\/\/www.ebay.com\/shop\/rca-6sn7gtb?_nkw=rca+6sn7gtb\"\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\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 data-bfc=\"\" class=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-ved=\"2ahUKEwiOnMDA4ciXAxUhTkEAHQDqEpwQi4wTegoIAggACAAIIxAA\" data-hveid=\"CAIIAAgACCMQAA\" data-complete=\"true\"\u003e\n\u003cdiv class=\"Fv6NCb\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-ved=\"2ahUKEwiOnMDA4ciXAxUhTkEAHQDqEpwQ-q4QegoIAggACAAIIxAB\" data-hveid=\"CAIIAAgACCMQAQ\" data-complete=\"true\" data-sfc-inited=\"2\"\u003e\n\u003ctable class=\"NRefec\" data-animation-nesting=\"\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"cZCYO\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\n\u003cth class=\"iry6k\" colspan=\"undefined\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eTube Feature \/ Attribute\u003c!--TgQPHd|||[]--\u003e\n\u003c\/th\u003e\n\u003cth class=\"iry6k\" colspan=\"undefined\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eRCA 6SN7GTB Details\u003c!--TgQPHd|||[]--\u003e\n\u003c\/th\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cZCYO\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\n\u003ctd class=\"Vk1lqb\" colspan=\"undefined\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\n\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eType\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003ctd class=\"Vk1lqb\" colspan=\"undefined\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eDual Triode Vacuum Tube (8-Pin Octal)\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cZCYO\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\n\u003ctd class=\"Vk1lqb\" colspan=\"undefined\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\n\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eOrigin\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003ctd class=\"Vk1lqb\" colspan=\"undefined\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eMade in the USA (RCA)\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cZCYO\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\n\u003ctd class=\"Vk1lqb\" colspan=\"undefined\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\n\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003ePlate Structure\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003ctd class=\"Vk1lqb\" colspan=\"undefined\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eBlack Plates (various getter and support-rod styles)\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cZCYO\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\n\u003ctd class=\"Vk1lqb\" colspan=\"undefined\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\n\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eTypical Audio Role\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003ctd class=\"Vk1lqb\" colspan=\"undefined\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003ePreamplifiers, Phase-Inverters, Driver Stages\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cZCYO\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\n\u003ctd class=\"Vk1lqb\" colspan=\"undefined\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003e\n\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eSound Character\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/td\u003e\n\u003ctd class=\"Vk1lqb\" colspan=\"undefined\" data-sfc-cp=\"\" data-sfc-root=\"c\" data-complete=\"true\"\u003eWarm, smooth, relaxed midrange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"RCA","offers":[{"title":"Default Title","offer_id":67815410335823,"sku":null,"price":800.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0669\/4354\/9519\/files\/images_44182f52-9a4a-4c4d-8271-cb80c7fdacd7.jpg?v=1792505052","url":"https:\/\/theoldstockroom.com\/products\/rca-6sn7gtb-nos-woth-boxes","provider":"The Old Stockroom","version":"1.0","type":"link"}