One of my amplifiers has blown up... Sob.
Quite possibly the best audio power amplifier in the world one minute, a 50V DC power supply the next... Thank the gods I have electrostatic speakers with DC blocking capacitors inside 'em or Jan would have found herself in the front garden beating off one of the cones.
Gah. I blame Bielzibabe - if it wasn't for him poking his fingers into everything I would have to put the amplifiers into a cupboard, and they wouldn't overheat.
Teach me to wind the bias current up for winter, I suppose...