Re: Tubes for TriampMkII, help needed!
I honestly think that amp would sound best with Svetlana or Tesla JJ EL-34's and a complete set of Groove Tube 12AX7C's. Click the link in my signature to get a great price on them from Revolutionguitar.com My amp is laid out similar to yours, and I've tried a lot of tubes. Those GT Chinese 12AX7Cs have great gain and are very tight sounding, so the bottom end won't be murky and the top won't be shrill. You'll be very happy. If you want to save a bit, just change the first 3 pre tubes and all the power tubes.