Sino polished metal base like G. E.
Sov/Russia the cheapest 6L6
Philips/Sylvania REMAKE! tall bottle 6L6GC plain factory...
6L6WGC-STR (aka 5881) tube, long-life version
Sov/Russia blackened glass
7581 Tung-Sol (upgrades 6L6GC) King of clean-headroom tone!...
The "Big Bulb" EL34, used by: Music Man®
A rugged russian tube by Electro Harmonix. Some claim the...