Tube for CAT Mk3

I just retubed my CAT Mark 111 with NOS Mullard ECC88(6922) and NOS Mullard CV4004(12AX7). In my system, the Mullards improved the midrange and overall dynamics. They are also very quiet both in the line and phono stages. The only drawback of course is the cost. NOS Mullards are getting harder to find. I have also used Amprex 6DJ8(6922) with excellent results.(you can not use the 6DJ8s in the V6 and V7 postions secondary to difference in plate voltages)Good luck.

I bought a CAT SL-1 III used, and sent it back to the factory for a phono stage. It had two NOS tubes replacing 6922's, and the factory told me that was a bad idea, that they weren't rated to handle the current the 6922's in that position would get. So I'd check with the factory on where it's SAFE to use other than 6922's. They're very friendly and helpful. Phone number: (716) 359-2700.

Oops, I see that the responder before me warned you already, and more specifically than I could, about voltage ratings. Sorry to be redundant.