{"product_id":"tested-matched-pair-rca-6sn7-gt-tubes-copper-grid-posts-black-plates-352-430","title":"Tested Matched Pair RCA 6SN7 GT Tubes Copper Grid Posts Black Plates 352 \u0026 430","description":"\u003cdiv style=\"text-align: center;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003eTested Matched Pair of RCA 6SN7GT Tubes.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003eDate Codes 352 and 430.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003eTubes are closely matched for Gm testing (see below) and internal structure - they are identical.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003eBlack staggered plates with copper grid posts and bottom square D getters.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003eOne tube base has worn wording with some minor bubbling of the bakelite near the bottom lip - see photo 4. Obviously, this doesn't affect performance in any way.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan\u003eTested on a calibrated Hickok TV-10 military tube tester\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003cspan\u003e with \u003c\/span\u003e\u003cb\u003eno shorts\u003c\/b\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cb\u003eno leaks\u003c\/b\u003e\u003cspan\u003e with the following results:\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003eGm Test = 3000-2875 and 2875-2750 micromhos\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan\u003eMinimum pass\/good = \u003c\/span\u003e\u003cspan\u003e1650-1650\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cspan\u003eAlso performance tested in-circuit through a Class A amplifier with no microphonics detected.\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cb\u003e~ Please view all 5 photos ~\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Classic Currents","offers":[{"title":"Default Title","offer_id":47749740986623,"sku":null,"price":74.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0788\/5999\/3343\/files\/s-l1600-34_373eb21c-a5a2-4b62-ba08-7bebb1a141e7.webp?v=1765483193","url":"https:\/\/classiccurrents.com\/products\/tested-matched-pair-rca-6sn7-gt-tubes-copper-grid-posts-black-plates-352-430","provider":"Classic Currents","version":"1.0","type":"link"}