It’s not the whole truth though, as [Albert van Dalen] demonstrates with his tube preamplifier running from only 3.3 V. If your first thought is that he must have made a flyback converter to ...

[Justin Scott]’s tube preamplifier is a great example, with its novel use of a pair of Nixie tubes to indicate the volume to which it has been set. The audio side of the preamp comes courtesy of ...

Smooth Impact Tube Compressor and Tone Sculptor Tube Preamp Equalizer. As with the previous series, these Valvenergy pedals employ Nutube to provide the dynamic responsiveness and rich harmonic ...