I have used 2 Amperex 7308's on the 1st stage, and 1 Amperex 6DJ8 Bugle boy. A bit noisey, but very musical. Upscale will not sell 6922 tubes unless you bought from them equipment.
I have also used the 6H23n in place of Sovtek in the BAT5 preamp, but the last and most critical tubes, I still use Amperex 7308, at least that saves a lot of money (8 tubes in BAT5).
I have also used the 6H23n in place of Sovtek in the BAT5 preamp, but the last and most critical tubes, I still use Amperex 7308, at least that saves a lot of money (8 tubes in BAT5).