> Hi Ingo,
>
> > Even though the
> > filter itself is rather smooth sounding the self oscilation comes all
> > of a sudden
>
> I'd be quite happy to cast an eye over the circuit to see if I can come
> up with a suggestion as to how to change this, but unfortunately I
> don't actually have this module and so do not have access to the
> schematics, so unless someone can send me a copy ... Dieter Anyone
>
> Tim

Tim,

I'll send you the schematics.

Dieter