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 ...

This high-resolution audio amplifier delivers exceptional sound quality with a simple yet efficient circuit design.

[ErikaFluff] needed an amp for her Grado open cans ... These tiny black and white screens use high voltage to scan an electron beam across a phosphor screen just like their bigger brethren.