Tubes for the Syrah. I found the best 6SN7s in the Syrah to be the KenRad VT231s or the old Sylvania brown bases, 6SN7W GTs I believe. The RCA 5692 red bases were terrible. I also found the best regulators were the Sylvania 5932 best. The best rectifier I found was the RCA 5V4 GA. The phono stage tubes give you little choice. The WE 147A versus the Raytheon 5842 is difficult as the first tends to be best if not microphonic, but most are. The choice between Mullard and RCA 6GK5 seems to make little difference. Also many of these tubes are noisy.
Tube rolling with this unit is great fun but expensive. Good luck to you beginning this journey.
Tube rolling with this unit is great fun but expensive. Good luck to you beginning this journey.