If you ever wanted to build your own tube amplifier but you were intimidated by working with high voltages, [Marcel]’s low-voltage tube amp design might spark your interest. The design operates ...

Compact tube amp accessory lets players carefully select their desired voltage, promising both tonal and functional results ...

There are a small handful of old tubes that need an impressively low voltage to work, though, and [J.G.] has put a few of them to work in this battery-powered audio tube amplifier. The key to the ...

The oscillator is able to amplify and self-regulate the voltage generated by the PV modules using its amplifier circuit and its nonlinear element. Electrical diagram of the Duffing oscillator ...