The Dynaco ST-70 is one of the most popular tube amplifiers ever. First released in 1959, it's still sought after by hi-fi enthusiasts today.

Let's take a spin through some of what I consider to be the best tube amps on the market today (not counting priceless vintage artifacts).

Integrated Design of a Compact and Lightweight S-Band Traveling-Wave Tube Amplifier for a New Class of Microwave Power Module Heather Song 1, Leslie Tekamp 1, Frank Francisco 2, Ming-Chieh Lin 3, ...

A conventional tube amplifier has a circuit whose fundamentals were well in place around a hundred years ago, so there are few surprises to be found in building one today. Nevertheless, building ...

A conventional tube amplifier has a circuit whose fundamentals were well in place around a hundred years ago, so there are few surprises to be found in building one today. Nevertheless, building ...

Design analysis of the K2-W Vacuum Tube Op Amp’s design and operation reveals the mad science that created a commercial revolution in 1950s and 1960s analog computing.

In the first of three parts, Andy hypothesizes that the K2-W Analog Computer Op Amp’s design has some unrevealed mad science in its input-stage design.

Building a tube amplifier is a dream for many engineers and makers alike. But factors like the cost, large enclosure, transformers, and complicated wiring harnesses can scare even the most ambitious ...

While purists may swear by tube amps, many modern guitar players prefer solid-state amplifiers over the hassles that come with tube amps. Let's see why.

Drop just released its latest collaboration, an OTL tube amplifier made to drive demanding headphones like the HD6XX - that also just happen to be top picks for gaming. Is the Drop + xDuoo TA-84 ...