Anyone have experience with different brands of EL34's?

For current production EL-34s, I really like the real Svetlana tubes, not the New Sensor tubes branded as Svetlana after Svetlana lost the rights to their name. That would be the "winged C" tubes. The original Mullard EL-34 tubes set the gold standard for EL-34s.

http://www.thetubestore.com/Tubes/EL34-6CA7-Tube-Types/Winged-C-SED-EL34

Hi,

I think he is speaking about these.

Andi is correct. He is showing you the *real* Svetlana EL-34 tubes and the picture you show is the New Sensor fakes I talked about. Those New Sensor EL-34s that are branded Svetlana are made by Sovtek and I don't think they sound as good as the real Svetlana EL-34s. New Sensor bought the rights to a bunch of vintage great names like Mullard, Gold Lion, Tung Sol, but they are all just Russian made tubes. Somehow through some form of industrial treachery, they bought the rights to Svetlana's name and Svetlana can no longer sell tubes under their own name. They now go by SED and use their insignia which is known as the "winged C."