This is another one of those hard to categorise websites. The author has done quite a few projects, most of them audio, but he also has some bicycle builds (including a chopper), a minibike, a homebuilt camera lens...

There is certainly a lot of good tube amp information here; both hi-fi and guitar amps are represented. He uses some pretty rare/weird tubes.. not your typical 12ax7 preamp, 6L6/EL34/6550 push-pull amplifier stage type deals...

Oh, and there is also several nice looking stereo speaker designs as well. And they aren't your normal sealed/ported designs either, he's got transmission lines and open baffle designs. Cool stuff!

Oh, and I forgot to mention he has a good sense of humor.