Originally Posted by OutToLunch

to get a better idea of what may be happening, you need to compress the simulation time to look only at the area of interest - i would say no more 100usec of simulation would suffice. You would also need to include the input voltage and the input current along with the output voltage.

hi,
I did that in a number of runs using the 7812, never got the 16V long overshoot that SC saw.

Also tried various load and current plots, again, nothing as high as SC.

I believe is a problem in that LT1086 model.

If you have LTS I could post the *asc.

The startup spike could be an artifact of the model, or it could be an accurate representation of actual performance. Hardware is the only way to know for sure.

Are you saying that you audio amp trips your GFCI?

Oh no, just that it dims the lights. The big one that causes the dimming is actually a commercial unit (Adcom GFA-555, 200Wx2 @ 8ohm). That amp is getting to be old enough I'm starting to think about re-capping it, it's pushing 15 years easy (not sure of manufacture date as I bought it used). I did have an electric smoker at one time (the only kind permitted by my apt complex) that tripped the GFCI every time I plugged it in though.

I just mentioned GFCI's as I have aquariums and GFCI's truly are a lifesaver, even if they sometimes do have nuisance tripping problems. Breakers and fuses are far to slow imo.