[Simon] wrote in to tell us about a headphone tube amp that he just built. It is based on schematics at diyaudioprojects.com that were actually featured on Hackaday in the past. [Simon’s ...

A few years back, [Gio] decided to try his hand at building a couple of tube amplifiers. The first amp was more of an experiment to see how well a DIY single-ended tube amp would sound.

The company’s newest headphone amplifier, the Valhalla 3, isn’t just a new-and-improved version of the Valhalla 2, which had ...

First made in 1959, this is the best-selling tube amplifier of all ... Uniquely, Dynaco sold its amplifiers in two different ...

You don’t need to be spending your spare time at the breadboard to understand how to put all this together. Inside the box there is even a tube of Goop so you can cover up all the internal circuitry ...