It's probably one of the most misunderstood things about vacuum tubes: The name on the tube is the company that made it right? Well actually the answer is No - and that's why it can be so confusing. The tube...
My Mullard / Amperex 12AX7 ECC83 makes a brilliant flash when the amp is turned on - is this a bad tube? Nope - the "flash" is perfectly normal and it's a trademark characteristic of Mullard / Amperex tubes....
Amperex 6DJ8 Tubes...Types and Production Years From the 1958 to ~1976 Amperex made a lot of different styles of the 6DJ8 . This guide will try to put them in chronological order of production. I will be...