I’ve been very busy repairing and restoring this stunning Marantz PM-8 integrated amplifier.
The Marantz PM-8 has to be one of the best integrated amplifiers from the golden era. These things are monsters, massively powerful and massively heavy. They are also massively complex to work on and this one had a massive fault!
More photos and details of the Marantz PM-8 restoration soon. You can find my article about the exploded filter capacitors, here! In the meantime, here’s a video summary of the testing and setup of bias, DC offset and power supply voltage.