Like me, when you're contemplating rectification, you probably only think of solid state or valve, right? Something like this:
Or maybe this:
Mercury arc rectification is by far the most impressive:
The two glowing orbs on the right are the mercury arc rectifiers at Kempton Steam Museum and convert 3 phase 415VAC into 200VDC @ 100A. Impressive, but possibly a bit big for my amp.