Electro-Harmonix TUNG-SOL 6386 Dual Triode Medium MU Vacuum TubeThe 6386 is a dual triode, medium mu vacuum tube particularly useful in circuits that exploit each sections remote cutoff characteristic. Famously, it can be found in various variable mu audio compressor units. These units and the unique sound of the 6386 have colored popular music since the 1960s. Historically, many have found use for the 6386 in cascode circuits, intermediate frequency amplifiers, and as a mixer where it can be used for automatic