Orpheus - An op-amp driven, Class A/B HPA with DC Servo

For some reason I wrapped the servo loop around just the output stage rather than the output and opamp stage.

It was a while ago now, and not sure why I went that way. I have a feeling it was that the sim wasn't happy when I tried.

It does work pretty well this way anyway, so maybe I got lucky.
 
I made sure to put ventilation slots on the rear face of the enclosure so that there would be airflow between each level out to the vented top.

The bursons are a mostly unobstructed around the sides and the top:

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On my to-do list I'll add putting a thermocouple on them to see how they actually perform with everything buttoned up as it'd be interesting to find out.