5AR4/GZ34 Rectifier Tubes


Is anyone currently making a tube of this type that rivals the performance of the best NOS Mullard tubes? I'm surprised that Sophia, Psvane and others appear not to have offered this tube. Suggestions?
dodgealum
I am really curious about the Genalex rectifier tube. I really like the 12AX7's of theirs. Retired all my old 12AX7. Very happy that this might be the tube era?
I have some Sylvania 6SN7 GTB brown base mid 1950's coming for my player. I will report out on the sound relative to the Sophia's when I get them. From what I understand, the earlier the tube, the more "chrome" there is in the bottle. If you look at 1960's tubes, just the cap has chrome.
My Genalex Gold Lion 5AR4 failed within 2 months. I bought a used Amperex Bugle Boy to replace it.