As you can see, my 12AU7 vacuum tube headphone amplifier/preamp based on a single ended class A design is finally finished! Since the last time I posted about this project, there have been a few changes and additions. I added a nice bright blue LED into the tube socket as a power indicator. I also […]

  I am currently working on a single 12AU7 class A tube amp for use as a preamp and as a headphone amp. As you can see, the case is not ready yet, as I still have to machine it. I’ve got it in a cardboard box so I can use it until then. I’ll […]