Hi, Hklai:
Svetlana was a venerable tube manufacturer with a plant in St. Petersburg, Russia. Several years ago, a company in the USA named Sovtek purchased sole rights to the brand name
"Svetlana," as well as other famous brand names, such as Tung-Sol and Mullard. So now Sovtek makes and markets tubes labeled Svetlana which are considered my some to be inferior. Meanwhile, the original (real) Svetlana makes tubes labeled SED-C with a winged 'C' logo, and some older production SED-C tubes carry the name Svetlana on the boxes. Sovtek markets some tubes that are said to be musical, including the Electro-Harmonix KT-88. Go to the above link to see a photo of a real Svetlana SED-C KT-88.
Best wishes,
Jay
Svetlana was a venerable tube manufacturer with a plant in St. Petersburg, Russia. Several years ago, a company in the USA named Sovtek purchased sole rights to the brand name
"Svetlana," as well as other famous brand names, such as Tung-Sol and Mullard. So now Sovtek makes and markets tubes labeled Svetlana which are considered my some to be inferior. Meanwhile, the original (real) Svetlana makes tubes labeled SED-C with a winged 'C' logo, and some older production SED-C tubes carry the name Svetlana on the boxes. Sovtek markets some tubes that are said to be musical, including the Electro-Harmonix KT-88. Go to the above link to see a photo of a real Svetlana SED-C KT-88.
Best wishes,
Jay