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Amazon.com: TELEFUNKEN Elektroakustik Matched Pair of ECC83-TK | Black Diamond Series 9 Pin Replacement Vacuum Tube 12AX7 : Musical Instruments
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Pair (TWO) Factory Matched and Balanced Telefunken Elektroakustic ECC83 12AX7 Black Diamond Tubes - Vacuum Tube Values
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QUAD (FOUR) Factory Matched Telefunken Elektroakustic 6L6 6L6GC-TK Black Diamond Tubes - Vacuum Tube Values
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File:Vintage Telefunken 12AX7 (ECC83) Vacuum Tubes, Made In Western Germany (15822838905).jpg - Wikimedia Commons
![ECC803S / E83CC / 12AX7 Telefunken Gold Pin High Mu Twin Triode. New Old Stock, New In Box. Made In West Germany. RARE. Not for Export. ECC803S / E83CC / 12AX7 Telefunken Gold Pin High Mu Twin Triode. New Old Stock, New In Box. Made In West Germany. RARE. Not for Export.](https://media.rfparts.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/i/m/img_2084.jpg)