![]() ![]() Svetlana's), I am not trying to sellĪnything or put sovtek out of business, but many MusicMen passing through me have had problems because of tube failure. I am only referring to my own experience as a tech, and although big fan of winged 'c' (not the U.S. And if you have the tube driver model, get a decent 12AX7/ECC83 each time you change tubes. I did have a unit into which I put a set of JJ´s (some E元4 special) that reportedly still works nicely, but I´m still stuck with my recommendations. ![]() The only E元4 tube I´ve seen work with full power in a MM HD130 over time is the Svetlana Winged ´C´. They will do fine on the ´lo´setting of course, and do well in many amps including the B-15 or any amp without 7-800 volts pounding that poor anode. Sovtek´s and cheap Chinese E元4´s, as already mentioned, may melt down and cause damage to the amp. 6CA7 tube - of course a similar tube electronically, but can withstand higher voltage and is a far better considering heat dissipation. I´ve had quite a few of these in my repair shop over the years, and remember they are designed for the U.S. At full power (130W - but I´ve seen them put out about 150w at idle) you´d really push the limits on those. Now, I´d be careful to unleash full throttle into those ruby´s. Nice thread, I have a MusicMan HD130 with one 115RH and one 212RH as my main rig. ![]()
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