Class A. Possible to use less-expensive tubes if that's all you've got. Part 1, 2:28 - finished amp, it's stereo. Part 1, 13:00 - audio schematic, one channe

Class A. Possible to use less-expensive tubes if that's all you've got. Part 1, 2:28 - finished amp, it's stereo. Part 1, 13:00 - audio schematic, one channel only. Part 5b, 3:55 - hand-wired power supply. No circuit board needed. Part 8, 10:49 - final hand-wired circuit. No circuit board needed.