Re: Sovtek Tubes
My Fender Blues Jr. came with Sovteks. I have experimented with a variety of preamp tubes including Electro Harmonix, JJ, Ei, Shuguang (Chinese), Tung Sol, an NOS Jan Phillips 12AT7, and an NOS 5751. For power tubes, I've tried EH, Ei, and JJ. Not that the Sovteks are bad, but any of these (except the microphonic Ei 12AX7) would be an improvement IMHO.
To me, tubes are like spices with each amp being a different recipe. You might want yours hot & spicey, while another guy might want warm & mellow. There isn't a right answer, and there aren't many "wrong" answers. Try searching here for "12AX7" and "EL 84" to find lots of opinions - everyone's got at least one!
Right now, I've gone back to the EH preamp tubes but really like the Ei power tubes. Tomorrow, who knows?
Chip