I've had my 5050 since the beginning of 01/12 and am loving it so far. But it has a buzzing vibration that seems to have something to do with the valve springs or something inside the valve casings. I haven't taken them apart yet, because the buzzing is minor. I hear it, but I'm not sure a casual listener would hear it. I recall reading another thread that said Miraphone valves use materials that are a little different from other brands. Someone mentioned they use a material like teflon or plastic instead of felt. Anyway, I was hoping someone might be able to give me some tips on what to look for when I take the valves out for the first time tomorrow.
The horn was purchased new, and when it arrived it was in the Miraphone box and it was apparent I was the first person to open the box. I'm thinking something minor shifted during shipping, etc. or maybe at the factory. The vibration reminds me a lot of the vibration I had on a new Jupiter 482 tuba I bought a couple years ago; it needed just a minor adjustment to be perfect.
Thanks in advance -hald