Modwright PH9.0 X power source modification

I also use a Russian Reflector rectifier. My power supply was modified soon after I purchased the phono preamp, so I can't comment on what it did for the sound. However, the Modwright sounds better and is quieter than either the Pass Labs or Parasound SS units I had in the past. Check with Modwright, they periodically have specials on rectifier modification.     

What tube type is the rectifier?

If you're asking me, 5AR4/GZ34.