it’s always fun of building an audio amplifier.
Not heavy output of audio power, but produces a clean audio with 2nd harmonic (sweep spot) 2SK JFET at the input stage and IRFP240 at output stage.
Single ended output: 8watts at 4 ohms (22V)
Supply voltage: 18-22V
Input impedance: 10K
Output impedance: 0.6 ohms
Sub assemblies
Nature, Electronics & Robots 