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?
128x128dodgealum
Wig...ditto on the advise regarding the power supply upgrade, I will also check in with Dan.
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.