I own this preamp. I was injured in an accident in 2018 and left all my gear in L.A. So please excuse the dust. The preamp is in perfect working condition and just needs a wipe-down. I replaced the power switch at one point because the original one broke. Other than that, it is original. I can’t recall if I’ve ever had to replace the tube. Feel free to ask any questions here. A friend is handling the sale or shipping, so I need to keep it convenient for him. Thanks!!!