[Simon] wrote in to tell us about a headphone tube amp that he just built. It is based on schematics at diyaudioprojects.com that were actually featured on Hackaday in the past. [Simon’s ...

Speaking of charm, we just love the amp these tubes went into ... We may have seen other homemade vacuum tubes before — we even recently featured a DIY X-ray tube — but there’s something ...

Make a portable audio simple amplifier. Homemade amplifier for speakers Jim Carrey says he’s come out of retirement as he ‘needs the money’ The world's longest living car engines New details ...