If your music system includes a turntable, a phono preamp is a must-have component in the product chain. Also called a phono stage, this component is essential for the playback of vinyl records. It ...

It’s a simple preamp circuit that has graced the small-signal end of countless tube amplifiers, including my youthful folly. Building the kit was as straightforward as any other through-hole ...

[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 ...