{"product_id":"tested-matched-pair-rca-6sn7gtb-tubes-black-plates-codes-ld-kg-6sn7gt","title":"Tested Matched Pair RCA 6SN7GTB Tubes Black Plates Codes LD \u0026 KG 6SN7GT","description":"\u003cdiv style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003eTested Matched Pair of RCA 6SN7GTB Tubes.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003eDate Codes LD and KG.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003eTubes are closely matched for Gm testing within 8% (see below) and internal structure - they are identical.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003eBlack 4 hole staggered plates with bottom square D getters.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003ePlease note: The tube with the date code KG has the tube number scratched into the backside of the base by a previous owner - see photo 4. The wording is also slightly faded on this example, but still legible.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan\u003eTested on a calibrated Hickok TV-10 military tube tester\u003c\/span\u003e\u003cspan\u003e with \u003cb\u003eno shorts\u003c\/b\u003e and \u003cb\u003eno leaks\u003c\/b\u003e with the following results:\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003eGm Test = 2625-2750 and 2875-2625 micromhos\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003eMinimum pass\/good = 1650-1650\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\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan\u003eFurther tested under real operating conditions on a Class A amplifier and exhibiting \u003c\/span\u003e\u003cb\u003eno microphonics\u003c\/b\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003cstrongr\u003e\u003c\/strongr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cstrong\u003e~ Please view all 5 photos ~\u003c\/strong\u003e\u003c\/div\u003e","brand":"Classic Currents","offers":[{"title":"Default Title","offer_id":47916017090815,"sku":null,"price":68.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0788\/5999\/3343\/files\/s-l1600-16_68a7535d-fdd9-4975-ad0e-f1deea03539d.webp?v=1766070804","url":"https:\/\/classiccurrents.com\/products\/tested-matched-pair-rca-6sn7gtb-tubes-black-plates-codes-ld-kg-6sn7gt","provider":"Classic Currents","version":"1.0","type":"link"}