When I bought Magnum Dynalab MD-108T Signature upgrade, I also got new Telefunken (Black Diamond) tubes - two ECC88 (6922) and two ECC83. New Telefunken tubes? Well, it seems that JJ from Slovakia is producing these tubes again. This is from their web site: "The TELEFUNKEN Black Diamond Series tubes are built in the JJ Electronic Factory in Eastern Europe based on their existing models. The Black Diamond Series tubes go through an extensive multi-tier testing and quality control process, as well as a cryogenic treatment in the USA to ensure they are the best representation of European made tubes. Each vacuum tube is burned in for 24 hours, tested for all critical parameters, cryogenically treated, and tested a final time. TELEFUNKEN Elektroakustik guarantees this by branding them with the legendary diamond logo."
More info on: http://www.telefunken-elektroakustik.com/products/tubes/faq.php
![P1060363 (1).jpg P1060363 (1).jpg](https://www.whatsbestforum.com/data/attachments/15/15327-707066c3df3bbf7ec091c83d2257cd62.jpg)
More info on: http://www.telefunken-elektroakustik.com/products/tubes/faq.php
![P1060363 (1).jpg P1060363 (1).jpg](https://www.whatsbestforum.com/data/attachments/15/15327-707066c3df3bbf7ec091c83d2257cd62.jpg)
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