Oscillation into voltage regulator of my new NAP 250 design.

Well, I've finished testing it, so with the 180 pF, it's actually the same.

Then I just tested it with the front-end regulator, and it works fine.

I'm thinking of trying another driver transistor because it worked better with the MJE15031, so I'll try changing the drivers. Then I'll just have to test the ground wiring for the front-end regulator, but I think this time I'm on the right track.
 
So I tested other drivers here with the MJF44H11/MJF45H11 pair. The Toshibas I originally installed aren't suitable for this regulator.

I'm getting pretty good results; things are stabilized.

I could also try putting the original MPSAs back on the small signals, but I'll leave it at that.

negative rail100 mv square 10Khz:
rail négatif 100 mv.jpg


negative rail 2 volts sinusoidal 1Khz:
rail négatif 2 volts.jpg


positive rail 100mv square 10Khz:
rail posirif 100mv.jpg


positive rail 2 volts sinusoidal 1khz:
rail positif 2 volts.jpg