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?
While I have a Mullard 5AR4/GZ34, I find the JJ sound very nice, better than Shuguang, and a good enough option for me. Unfortunately, the Shuguang have proved more rugged/reliable.
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