Tracewell Systems, a custom power supply manufacturer and engineering services company, builds power supplies and other electronic equipment for a variety of customers. One contract came from a major ...

What Is a Tube Amplifier? Tube amps are made using vacuum tubes, which were invented in 1925. Using a glass bulb akin to a light bulb, tube amps take a weak signal and amplify it several times through ...

Can this affordable EL84-based vintage tube receiver play with the big kids in the sandbox? You might be surprised by the answer. Why is there still so much interest in tube amplifiers? One would ...