Despite the oldest solid state audio circuitry now qualifying for a pension and a bus pass where this is being written, the thermionic tube retains a foothold in the world of audio — cherished ...

With the wealth of cheap and highly integrated audio amplifier modules on the market today, it takes a special dedication to roll your own from parts. Especially when those parts include vacuum ...

When it comes to listening on the best headphones, many hi-fi fans swear by the power of tubes. Amplifiers that use vacuum tubes instead of – or alongside – solid-state electronics are ...

A vacuum tube is just that: a glass tube surrounding a vacuum (an area from which all gases have been removed). What makes it interesting is that when electrical contacts are put on the ends, you ...

The VirtuPVT system features an absorber plate, monocrystalline PERC solar cells, a borosilicate vacuum tube, an integrated reflector, and an integrated mounting system.