Keritech "Litle Red Devil" EL84SE - A custom-made amp with a Bluetooth interface and remote control

Presenting the Keritech Electronics 84SE-LJ "Little Red Devil" stereo single-ended EL84 amplifier... with a twist that makes this amp unlike any others I built before. It has some very old-school and modern tech inside, working together. All handmade with love by yours truly, none of that machine and artificial intelligence rubbish. They ain't takin' amp builders' work away! My customer's wish was to have a lovely little and cheap amp with a possibility of enhancing it with a Bluetooth interface and a remotely controlled volume pot sometime in the future. Here I come - doing the project on a budget tighter than Ethel Granger's laces, with a small enclosure I had to put it in, and a bunch of design obstacles to work around. I think I overdelivered. Ha. 0:00 Intro 1:48 Amp Overview 3:45 Little Red Devil? 4:50 Back Panel 5:48 Signal Flow 11:10 Plate Voltage Filter (and Stupid Schematic Shenanigans) 13:18 Control Circuits and Bluetooth Interface 18:02 Power Supply 21:05 Correcting Again