{"product_id":"6ea7-sylvania-coin-base-nos-p4","title":"(!!!!) (Best Pair #2) 6EM7=6EA7 Sylvania coin-base NOS 1970's (1.5ma\/73ma and 1.8ma\/65ma)","description":"\u003cp\u003e1 pair) 6EM7=6EA7 Sylvania coin-base NOS 1970's same build\u003c\/p\u003e\n\u003cp\u003e1 tube) 1.5ma Gm=1500 (triode) 73ma Gm=8800 (pentode) Sylvania\u003c\/p\u003e\n\u003cp\u003e1 tube) 1.8ma Gm=1800 (triode) 65ma Gm=8900 (pentode) Sylvania\/Zenith\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTested on Amplitrex\u003c\/p\u003e\n\u003cp\u003eGood Ma Triode = 1.4ma Gm=1500\u003c\/p\u003e\n\u003cp\u003eGood Ma Pentode = 35-40ma Gm=6500\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003efor:\u003c\/p\u003e\n\u003cp\u003eJoule Electra LA-100 MK3\u003cbr\u003eModwright power supply\u003cbr\u003eWright Sound phono wpp-200c\u003cbr\u003eWright Sound WLA12A preamp\u003cbr\u003eKenji Mizushima Kenso\u003cbr\u003eMusic Reference 6EM7 amp\u003cbr\u003eWelbourne Apollo mono amps (KR\/VAIC VV52B or 300B output tubes)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":44216520999164,"sku":"6em7pr","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_784045e8-91db-4fb7-a9e5-070d65c7ce37.jpg?v=1721673243","url":"https:\/\/tubeworldexpress.com\/products\/6ea7-sylvania-coin-base-nos-p4","provider":"Tube World Express","version":"1.0","type":"link"}