This is my valve audio amplifier that I bought from EBAY as a kit, for $249au……the build went flawlessly, and the quality of the audio from this amplifier is fantastic. It is only 7W per channel (though I am yet to measure that), but is well worth the build.

One comment that I will make about this unit is that it comes with NO INSTRUCTIONS. You need to be able to read and understand the circuit diagram of the amplifier to build it.

When building this unit, make sure to set up a common signal ground point right near the input terminals (you can see this in one of the photos).

Finally, here is a video of the amplifier running 🙂