SV6L6GC Svetlana Winged =C= NOS MATCHED QUAD 6L6GC tubes.
The Svetlana SV6L6GC is a glass envelope beam-power tetrode intended for high-
power audio amplifier service. Close manufacturing specification tolerances and
improved processing provide improved reliability and superior sonic performance. These Svetlana SV6L6GC was manufactured in the Svetlana factory in St. Petersburg, Russia, and were designed to be a direct replacement for any 6L6 type. The factory ceased production of these and other glass tubes 2012. What you are seeing for sale now are not the original Winged =C= tubes from this factory. Check the picture of these tubes for verification.
I purchased 2 new quads of these tubes in either 2002 or 2003 and used one quad in an amplifier that was later sold. This quad has never been used, but the tubes were tested on a Hickok 539C with digital meters and the results are on a label shown in the picture. These tubes are in very close balance both for current and transconcductance, something you will seldom see.
Price $150.00 Plus Shipping
Shipping USPS ground within the lower 48 states.