[rfeenstra]

It was a very minor wiring error that caused one channel to have a slightly higher harmonic distortion level. Hardly audible. I rebuilt this one a year or so ago. Set the output bias to shut the outputs down ever so slightly. My studio does not push it hard so a slight reduction in full power capability doesn't bother. Things run a bit cooler. If I were ever to put it in an enclosure, there would be a cooling fan as it did when I built it in 1965.