Volume unit (VU) meters are cool — it’s an undeniable fact. For some reason, humans just dig lights that flash along with sounds. You can build a VU meter using LEDs, or bulbs if you’re trapped in ...

Some of you may remember a recent project that featured on these pages, a 555 timer reproduced using vacuum tubes. Its creator [Usagi Electric] was left at loose ends while waiting for a fresh PCB ...

When it comes to listening on the best headphones, many hi-fi fans swear by the power of tubes. Amplifiers that use vacuum ...

X-ray imaging is best left to the professionals for a good reason. While the tool is not dangerous when utilized properly, it ...

Einstein Audio Components, based in Germany, is a manufacturer of tube amplifiers, a tube CD player, and phono stages and phono cartridges Ex-movie theater projectionist Steve Guttenberg has also ...

EASTHAMPTON — In a world ruled by the microchip, David Mell’s customers at Viva Tubes crave the soft electric hum and warm audio tone of the old-fashioned analog vacuum tube. Tubes — simple devices ...

Naked Energy is commercializing a photovoltaic-thermal system to capture excess heat generated by PV modules for use in buildings. The VirtuPVT system, conceived for rooftop applications, includes an ...