[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 ... vacuum tubes before — we even recently featured a DIY X-ray tube — but there’s something about [jdflyback]’s tubes ...

And because it was initially designed as DIY kit, it’s easy to restore ... Like most vintage audio equipment, original Dynaco ...