> I use the NE5517N, and I found 3 specs for this NE-device, > all of them with the note, that it is TOTALLY equivalent to > the 13600. Is that not true, perhaps ? Not at all. No wonder that you get offset problems with the 5517. The 5517 is more like a 13700, not 13600. It's all in the archives (;->). JH.