well i just went out and bought a meter and tested the voltages -- 15.5 for both positive
and negative. i assume this is the problem

could this be the power supplies they both say 15VDC 500mA.

thanks,
--david

--- In Doepfer_a100@yahoogroups.com , Florian Anwander <Florian.Anwander@...>
wrote:

>
> Hi david
>
> > only a few modules work correctly, a few not at all and a few with a very bad ground

hum.

> Did you measure both voltages with one of the "bad" modules plugged in
>
> Did you check the modules separately one after the other, or did you
> plug in all at the same time If the latterm then try them separately.
>
> I do not know the non-Doepfer modules you mentioned, but maybe they rely
> on a connection frontplate -> electrical-ground (0Volts).
>
> Florian
>