{"product_id":"telefunken-12ax7-matched-pair-western-germany-hickok-tested","title":"Telefunken 12AX7 Matched Pair, Western Germany, Hickok Tested","description":"\u003cp\u003eThis is a matched pair of Telefunken 12AX7 tubes.  They are old enough that they are branded \"Made in Western Germany\".   Since Telefunken ceased tube production in the early 1980s, this is genuinely a vintage German tube. \u003c\/p\u003e\n\u003cp\u003eEach tube has the Telefunken diamond cast in the bottom of the tube.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTESTING: \u003c\/strong\u003e These were tested using a pair of Hickok 533A mutual conductance tube testers.  The mutual conductance (Gm) of both triodes is written on the side of each box. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNEED A MATCHED QUAD?  \u003c\/strong\u003eSend me a message and I will be glad to see if I can put together a matched quad for you.  Glad to do it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWHAT DOES \"MATCHED\" MEAN?  \u003c\/strong\u003e\"Matched\" seems to be open to interpretation, but here is how I define \"matched\".  The Gm of Triode 1 of the first tube is within 10% of the Gm of Triode 1 of the second tube.   The same holds true for Triode 2, the Gm of Triode 2 of both tubes must be within 10% of each other. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePHOTOS: \u003c\/strong\u003eThe tubes in the photos are a sample only.  Since I have multiple pairs of these tubes, the photos you see are probably not the ones actually in the photos.  The photos are only one pair out of many.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePRINT: \u003c\/strong\u003eThe print on each tube can range from strong and clear to nearly gone\/gone.  Even with all print gone, the Telefunken diamond on the bottom confirms it is a Telefunken.   Each tube is printed with either Telefunken, Dynaco (Telefunken manufacture), or Fisher (Telefunken manufacture) name. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSHIPPING: \u003c\/strong\u003e Each tube will be in a standard tube box, and that will be inside a 32 ECT shipping box for safety.  It will be padded appropiately.  It's in my best interest for your tube to arrive in good condition, so I'll do my best to make sure that happens.\u003c\/p\u003e\n\u003cp\u003eThis tube ships quickly and safely from Mississippi.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Telefunken","offers":[{"title":"Default Title","offer_id":46311781892292,"sku":"RB8 L2","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/9413\/8052\/files\/RB8.jpg?v=1782418295","url":"https:\/\/fatcat.parts\/products\/telefunken-12ax7-matched-pair-western-germany-hickok-tested","provider":"FatCat.Parts","version":"1.0","type":"link"}