There is not really enough information to go on. Two issues that you should resolve are:
Quote:ac and tran stb
Not sure what what that means. If you are using AC analysis, you should stop. To measure loop gain and stability you should be using the
stb analysis. As far as I know there is no
tran stb analysis, so you should describe what you mean by that.
Quote:the frequency spectrum @ low frequencies (<10kHz) has weird issues
That is just to vague to allow me to offer any help.
And what are the two curves in the graph.
-Ken