Available in Platinum Matched Pairs, Quads, Sextet or even Octet Sets!!!

The platinum matching process consists of a 24 hour tube burn-in period followed by a bias (plate) current measurement in milliamps.

Whether it is the 6550C or the EL34, you cannot beat the reliability and quality of Svetlana power output tubes, that is why we only stock and use one brand.

This is my tube of choice for all powerful 6550 applications. Reliable, great sounding and globally known to be made to a strict constant quality standard. They have been proven #1 for years when used in professional music applications that require 24/7 all day every day use without problems. I will not use any other power tube in my personal amplifiers and neither should you. Insist on Svetlana Platinum Matched 6550C vacuum tubes for your application today.

The Svetlana 6550C tube is a tube manufactured at the New Sensor Corp. owned Xpo-Pul factory (also known as Reflektor) in Saratov, Russia. Use it to replace all other 6550 tubes and KT88 tubes. Solid construction and build quality. When Vacuum Tube Valley reviewed this tube they suggested it to be the best budget 6550 tube available. They noted its smooth, liquid bass, natural sound, and openness.