Hart Amplifier Repairs
Hart Kit John Linsley-Hood MOSFET Stereo Power Amplifier
This one had one channel louder than the other, the headphone sockets or one that mutes the pre output was noisy\intermittent. That wasn't the main culprit though, the mute FET's on the power amp inputs were playing up, conducting when they shouldn't, replacing them improved the audio quality dramatically. I used 2n5459.