Sony TA N902 N900 N901 Esprit Solid State Class A Amplifier Clone II Switching Dual Power Supply

DIY 
My Sony Esprit Clone Power Amplifier!

Power Boards Hetasink

Switching power supply

Philips Amplifier RH 521 Revisited Class AB 50W Project

Power section of Philips RH 521 70's Calss AB Amplifier modified in:

Full Complementary Output Power Stage, Thoshiba 2SC3281 2SA1302 or Sanken 2SC3519 2SA1386

Cascode for VAS Stage

Feedback amount changed

Philips RH 521 Amplifier 

Distortion at 20Vpp