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 ...

For example, traveling wave tube amplifiers (TWTAs) typically are operated in saturation so the amplifier’s power rating is the saturation power. In contrast, a solid-state power amplifier (SSPA) ...

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 ...