damm I'll post a review with pics along the way. I'm ordering the pcb this week so I'll let you know how it goes

Thanks a bunch. I think that I'll try that low-voltage hybrid headphone amp you pointed out. I even have that issue of audioexpress. Is there any special safety precautions (besides the obvious) that I need to take into account when working with tubes? For instance: do they hold a charge after...

I'm looking for a new project to do. I'm a relative newbie and I'mm more than willing to jump in over my head. I want to make a tube amp for my audiophile father (local high end stereo shops used to use our house to demo equipment). He dosen't listen to headphones much but he does own some grado...