{"product_id":"5998-tungsol-v11","title":"(!!!!) 5998 Tungsol IBM black plates used\/very good 1960 (80\/96ma) (close Gm)","description":"\u003cp\u003e5998 Tungsol IBM black plates used\/very good 1960 in white box\u003c\/p\u003e\n\u003cp\u003e1 section)  80ma Gm=12,100\u003c\/p\u003e\n\u003cp\u003e1 section)  96ma Gm=12,300\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003eSINGLE TUBE, NOT A PAIR\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eGood Ma range 70-100ma\u003c\/p\u003e\n\u003cp\u003eGood Gm range 14,000 - 16,000\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eBEST FOR:\u003cbr\u003e--------\u003cbr\u003ePeter Millett headphone amp\u003cbr\u003eWoo Audio 2\u003cbr\u003eWoo Audio 3\u003cbr\u003eWoo Audio WA3+\u003cbr\u003eDarkvoice 336i\u003cbr\u003eDarkvoice 336SE\u003cbr\u003eFi 421A \u003cbr\u003eSingepower Extreme\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e(5998 is an uprated 6AS7G and has a 13 watt plate dissipation rating)\u003cbr\u003e(the 5998 sounds very clear and has superb overall sonics, the 421A Western Electric sounds even better; slightly more magical sound)\u003cbr\u003e(5998 Mu = 5.4, Gm = 15500, Rplate = 350 ohms, Vplate max = 250 volts and Vplate max 5998A = 275V)\u003cbr\u003e(7236 Mu = 4.8, Gm = 12500, Rplate = 350 ohms, Vplate max = 300 volts)\u003cbr\u003e(7236 is a computer rated 5998A, 7236 and 5998A are uprated from 5998)\u003cbr\u003e(6AS7G Mu = 2, Gm = 7000, Rplate = 280 ohms)\u003cbr\u003e(6080 Mu = 2, Gm = 6500-7000, Rplate = 280-300 ohms)\u003cbr\u003e\u003cbr\u003e5998 substitute = 7236 \u003cbr\u003e7236 is a computer rated 5998A\u003cbr\u003e\u003cbr\u003e5998 RATINGS:\u003cbr\u003e------------\u003cbr\u003eFilament Voltage 6.3 V \u003cbr\u003eFilament Current 2.4 A \u003cbr\u003ePlate Voltage (max) 250 V \u003cbr\u003ePlate Current (max) 125 mA \u003cbr\u003ePlate Dissipation (max) per section 13 W\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"5998 Tungsol","offer_id":45167766864124,"sku":"5998ts","price":248.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/6_f82873bf-86f8-489a-ab2e-1a0712da2f7c.jpg?v=1785351544","url":"https:\/\/tubeworldexpress.com\/products\/5998-tungsol-v11","provider":"Tube World Express","version":"1.0","type":"link"}