Description
This pair of 6MD8 tubes (one IEC the other Sylvania ) tested strong with no shorts on a Precision 10-12 tube tester. The 6MD8 was originally designed as a triple triode with a common cathode. It was used in televisions in the 1960s. If you need one, this is a good deal at this price. Because, it comes with a spare and they are not making any new ones!