Here we have the superb Svetlana (SED) Winged C 6L6 GC Replacement Valve / Tube. This 6L6 Svetlana tube / valve is among the dozens of spare valves that I've accumulated over the years as spares and backups for various Mesa Boogie amps and pedals I've owned. It's had 10-15 hours use in my amp but it's hardly scratched the surface of its long life.

Suppliers Description

The SED (Winged C) 6L6GC is made exclusively at the SED SPb factory in St. Petersburg and bears the "Winged C" logo. This is the factory that made the famous Svetlana tubes before the New Sensor folks grabbed that name and started using it on other tubes not made by the original Svetlana factory in St. Petersburg. If you want the authentic Svetlana tubes, look for the "Winged C" logo.

Platinum Matched & Tested

The Svetlana winged C 6L6GC has tremendous harmonic content and an overall depth in sound make these another excellent choice for the purist. They can handle solid plate voltages and are very well constructed. Consider these tubes as an excellent choice for any type of music, delivering crystal cleans and smooth breakup with plenty of punch. It has clarity and complex harmonics, plenty of sustain and depth.It means we burn-in these valves for a minimum of 30-40 hours before matching. The reason we do this is get rid of any faulty or weak valves and as a pre-grading process to allow the plate/grid mechanism to relax into it's rest position. Tiny differences in construction make for enormous differences in electrical characteristics, and thus if a tube is graded after it's been burned in then the measured characteristics hold true over its lifespan to a greater extent. This seems simple but it's amazing how many vendors ignore it. It's the reason so many people complain about poorly graded tubes.