Stay tuned for an amplifier design using NPN power transistors only, as they say it's the QUASI version of our popular Series 2 Full Complementary Power Amplifier.
This DIY amp was actually replaced with the Series 2 Complimentary modules. Output transistors, filter capacitors, casing, and power transformer were retained.
Supply voltage +/- 70 volts 10,000 uF filter per rail