Doppler Audio

Very occasionally this digital organ would make a sudden ‘bang’ through the speakers … chasing it down was tricky because it never happened when I was there, so I pulled the power supply and both amplifiers.

This is what I found inside one amplifier … seriously degraded lead-free solder joints on a 5-watt 12v Zener that helps regulate a mute voltage line also linked to the -38v amp rail...methinks it was spitting!