About 15 years ago I bought a non functional MC30. I removed and replaced some parts with the hope of it functioning again . Some tubes and can type caps were changed..I was told by some non techy hi fi friends that the output transformer is bad along with some dried up caps.Ive been looking at it ever since as a museum piece as it seems quite involved to have it fixed. FWIW it produced sound off the bat but at a very very VERY low output. I wonder what it would take for it to breathe again