Before you said if you changed the voice board you still had the same
problem. If that is the case, the problem is not on your voice card
so don't try changing parts on the voice card.

You say the problem it is only with OSC1. So if you ONLY have OSC1
on you hear distortion, but if you ONLY have OSC2 on there is no
distortion (make sure OSC2 is at full level), correct If the
problem really is with just OSC 1, see the next paragraph. If the
problem only happens when both OSCs are on, the output level is
likely too high. Each voice passes through a passive (i.e. resistor
divider with a pan) before the final output stage. The pan was the
most likely cause, but you already tried that. Try panning the voice
hard left and hard right. Do you have the distortion in both
positions

Does the problem happen on both the Saw and the Pulse shapes Does
the Pulse Width change as you spin the PW knob If the problem is
only with the Pulse Wave I have some ideas.

Let me know what happens.

--- In oberheim@yahoogroups.com , "jringmrath" <jringmrath@...> wrote:
>
> I tried panning the distorting voice card and cleaning the pots- it
didn't help. I do only
> hear it when I have OSC 1 engaged - with just OSC 2 I don't hear
the distortion. The weird
> thing is that I tried replacing the Curtis 3340 for OSC 1 and I get
the same distortion, so I
> don't think it is the chip. Any other thoughts
>
> Jonathan
>
> --- In oberheim@yahoogroups.com , "nelsonj_sce" <nelsonj_sce@> wrote:
> >
> > As for the distortion, try panning your bad voice and see if that
> > helps the problem. Also clean the pan pot with some component
> > cleaner.
> >
> > As for the "ghost" note...I have to think more about that.
> >
> > --- In oberheim@yahoogroups.com , "jringmrath" <jringmrath@> wrote:
> > >
> > > I have an 8-voice OBXa and have a couple of nagging issues I
> > haven't been able to resolve.
> > >
> > > First, I seem to get some slight distortion from voice board
#8.
> > If I move the board to
> > > another location, it sounds fine. If I move a known good voice
> > board to the #8 position I
> > > get the same distortion. It is most obvious on the organ-type
> > sounds. I have been using
> > > it as a 7-voice until I can track down the problem.
> > >
> > > Second, if I play the chord "G,C and Eb" in the middle octave
of
> > the keyboard, it also
> > > sounds the "E" below the G. Needless to say, this can be
> > annoying! Must be something
> > > having to do with the keyboard scanning, but I don't know what
> > exactly. The double mode
> > > also doesn't seem to work 100%. Maybe a related issue
> > >
> > > Any thoughts on what might be causing these and how to fix
them I
> > have the schematics,
> > > but I don't really know what I'm looking at since I'm not a
tech.
> > >
> > > Thanks for any help or advice!
> > >
> > > Jonathan
> > >
> >
>