Modwright PH 9.0X Tube Rolling Question


I recently acquired a used PH 9.0X phono preamp and
I want to upgrade the Russian 6922 tubes. Anyone have
any experience with this particular preamp? I'll be looking
for NOS tubes.  

ericsch
Post removed 

Just a heads up, the Sovtek that are in the pre are really the only option. I ordered a set of 6C4 Mullard & their to small.

@danmar123 and @audiosaurusrex This is incorrect. Electro Harmonix makes a gold pin 6C45, and the another, the best one is the Russian Reflektor 6C45. They are both better than the Sovtek, with the Reflektor much, much better. That said, they are very rare nowadays and very hard to come by. That said, there is no tube equivalent to the 6C45.

I owned a 9.0 for a number of years and tried many tubes.  If you have a tube rectified power supply I would upgrade with a gz34 metal base.  It made the biggest improvement to any component I've ever owned.