Here is a nice sounding, strong testing, matched pair of genuine Telefunken ECC83/12AX7 tubes. These are the legendary, earlier "ribbed" or "ladder" plate type, with the molded diamond and date codes on the bottoms; plus this pair does have decent looking logo labelling. These test close and strong; as a collectible pair of phono grade Tellees should. On my trusty Hickok transconductance tube tester, a test result of 875 represents a 65% good tube and new tubes of this type typically yield 1300 or higher. The first tube, dated <26>, tests at 1300 & 1200 and has the typical smaller logo. The second tube is dated <27> and tests at 1200 & 1200 and has the same small silk-screened logo. These tubes passed the Shorts and Gas tests plus show very strong Life Test results when testing filament voltage was lowered; confirming these are only lightly used tubes. These are earlier vintage than smooth plate Telefunken 12AX7s and their sound is preferred by many collectors. A brief listening test in my phono preamp verifies a very nice sounding, non-microphonic, matched pair of phono grade, genuine Telee tubes. This rare pair of Telefunken ECC83 tubes will easily last many more decades. These come unboxed but safely packed. This pair of tubes will be mailed anywhere in the USA via Small Priority Mail Flat Rate box for $7.
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