{"product_id":"mullard-12ax7-tubes-lot-of-5-used-see-details-in-listing-hickok-tested","title":"Mullard 12AX7 Tubes, Lot Of 5, Used, See Details In Listing, Hickok Tested","description":"\u003cp\u003eEach of these Mullard 12AX7 tubes has been checked on a Hickok 533A, and the results of the mutual capacitance (Gm) check of each triode is listed by each tube below.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e10M Series, yellow ink, halo getter, Triode 1: 1175, Triode 2: 1200\u003c\/li\u003e\n\u003cli\u003e10M Series, yellow ink, halo getter, Triode 1: 1000, Triode 2: 1100\u003c\/li\u003e\n\u003cli\u003eMullard, most of the ink is gone, dual post halo getter, Triode 1: 1050, Triode 2: 1000\u003c\/li\u003e\n\u003cli\u003eMullard, shield logo, good ink, dual post halo getter, Triode 1: 850, Triode 2: 850\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMullard, most ink gones, dual post square getter, Triode 1: 950, Triode 2: 900\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eAll five tubes have ribbed, gray plates.\u003c\/p\u003e\n\u003cp\u003eTube data shows an original, new 12AX7 had an average Gm of 1250.  Divide each Gm value shown above by 1250 to get the \"good percentage\".\u003c\/p\u003e\n\u003cp\u003eThese will ship safely and quickly from Mississipi.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Mullard","offers":[{"title":"Default Title","offer_id":46335360794820,"sku":"RB16","price":299.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/9413\/8052\/files\/20260703_140154.jpg?v=1783106239","url":"https:\/\/fatcat.parts\/products\/mullard-12ax7-tubes-lot-of-5-used-see-details-in-listing-hickok-tested","provider":"FatCat.Parts","version":"1.0","type":"link"}