Sovtek 5881/6L6WGC

Pricing is per tube.

Chances are if an amp uses 6L6-style output tubes, it has Sovtek 5881's in its sockets. Built to rigid military standards, the 5881 will tolerate higher voltages than any other 6L6. In fact, they're frequently used as replacements for the old 7027 model in vintage Ampegs.

See unmatched version: https://shop.ehx.com/item/5881

Tube Specs: http://shop.ehx.com/catalog/tubes-specs/5881%20SV.pdf