My DIY UcD amp from the junk box

[acid_k2]

Hi...
I'm proud to present my first UcD amp circuit.
All components come from the junk box (!) Yes, no money for this amplifier, no smd, no ic, no gold plated connectors, no strange japanese transistors.... on two homemade printed boards: a pcb for modulator, a pcb for power stage, 68X35 mm each.
It's perfectly running at 20Vdc (single rail supply, output cap!) on a 2 ohm load, delivering a very very clean, bright and powerful sound.
I've built a second power stage, and I'm planning to modify the modulator to drive two power board in bridged mode (so I can get away this horrible output cap!)
It's based on classd4sure schematics (threads: UCD Based Fully Differential Full Bridge 450W RMS Amp ; My DIY UCD ) (thanks to Chris, Bruno,etc. ), and on the big know-how of the people in this forum (thanks to all)!
Some data:
power Mosfets: IRF540
transistors in modulator: BC557 and BC237
transistors in power stage: all BC337 + 2SD478 (from the deepest and darkest place of my junk box) for stabilized voltage in gate drivers
all diodes: 1N4148, no schottky diodes!
output filter: 28 turns of 0.6mm2 enamel wire, on a ferrite bead... (about 22 microHenry), and 1microF cap
final output cap: a 30 years old, 1000 microF german electrolytic... last attempt to use it in a circuit!
This is the most simple and funny amplifier I have built in 15 years...

[gni]

Very good use of old parts. . .better to be heard than seen in a garbage heap!