Some time back I built a card to read all 4 voltages and yesterday took a few minutes to check the IIgs power supplies I had handy. Most I had checked several years ago but there had been some changes. A couple of power supplies are a bit off. I have a +11.5 on one and a +11.6 on another.
Now, what to do? I likely have most of the caps on hand so maybe replace those and see if there’s a difference.
No need to do anything. These are normal values for the +12V rail on all Apple II machines with original power supplies.
The 11.5 one used to be 12.1v
Probably when there had been more load on the +5V rail.