I have had Siemens, Sovteks, Tesla JJs and Svetlanas in my MV-50. The Svets are my favorites with there nice sweet mid-range. The Teslas are good as well. Not as nice in the mids as the Svetlanas. A little better bass. My experience with Svets mirror Enzo in reliability. Currently have nearly 2 years on a quad set with no problems. If money is no problem, NOS Mullards are clearly the way to go but the Svetlanas are the next best thing.
tube suggestions for cj MV50?
I've been using a cj MV50 power amp for a number of years. Up until now, I've used mainly Sovetek EL34s and with them I've had very few failures. I would like to try other manufacturers' tubes, but am not sure where to start. A quad of Svetlanas sounded better, but didn't last more than a 3-4 months of moderate use. Maybe one of the tubes burned out prematurely, I don't know. If you have used one of these amps, I'd appreciate any suggestions as to what works and what doesn't. Thank-you!