For 6SN7 tubes for my preamp and amp, I am really quite happy with the Shuguang Treasure CV181-Z and CV181-T tubes. They might not be quite as good as the very best NOS war time tubes, but they are more consistent, less expensive, and easier to get.
For KT88 power tubes, I like the Shuguang Treasure KT88-Z and KT88-T tubes better than any of the Russian tubes out there. I don’t even consider NOS for these tubes as I am not going to spend the money for the old Genalex tubes.
For, 6922 tubes, I could not find a new production tube that sounded good. So I invested in late 50’s and early 60’s Siemens and Telefunken NOS tubes. In the end, I used an adapter with Western Electric 396A/2C51 tubes. These were the best tubes I ever heard in 6922 applications. Russian Reflektor 6NP3-E tubes with the same adapter are really good too. Better than the much more expensive 6922 tubes.
For KT88 power tubes, I like the Shuguang Treasure KT88-Z and KT88-T tubes better than any of the Russian tubes out there. I don’t even consider NOS for these tubes as I am not going to spend the money for the old Genalex tubes.
For, 6922 tubes, I could not find a new production tube that sounded good. So I invested in late 50’s and early 60’s Siemens and Telefunken NOS tubes. In the end, I used an adapter with Western Electric 396A/2C51 tubes. These were the best tubes I ever heard in 6922 applications. Russian Reflektor 6NP3-E tubes with the same adapter are really good too. Better than the much more expensive 6922 tubes.