Great to hear! I've replaced a bunch of those in both SDS-III and SDS-IV
and I think it's an indication of what the expected life span of those
components are.
The best thing with those machines is that if at least one channel is
OK, it's very easy to compare and the PCB is not crowded in any way.
And, as you mentioned in an earlier post, the oscillator is a Moog
styled filter. ∗boooom∗ :D
--
electronically yours, jesper
- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se
philmurr skrev 2013-08-03 11:17:
> I had to replace all 3086's in my SDS-IV, both channels before I could
> get reliably working sound again.
>
> The noise generator is common to all channels so if you're getting noise
> on at least one channel then the noise generator is fine.
>
> The only other thing to check is IC3a the VCF output.
>
> I've recently fixed an SDS-III and had a play with the sounds once
> fixed, and am still amazed at what it can produce. As Michael says, good
> luck, it will be worth it !
>
> --- In Simmons_Drums@yahoogroups.com
> <mailto:Simmons_Drums%40yahoogroups.com>, "Michael Buchner"
> <buchnerelectronics@...> wrote:
> >
> > Yes, it is the famous Moog VCF.
> >
> > Yes, pitch is Cutoff Frequency.
> >
> > Check the CV and listen with a signal follower at each of the 4
> ladder capacitors of the filter.
> >
> > Good luck
> >
> >
> > ----- Original Message -----
> > From: scistudio440
> > To: Simmons_Drums@yahoogroups.com
> <mailto:Simmons_Drums%40yahoogroups.com>
> > Sent: Friday, August 02, 2013 8:43 PM
> > Subject: Re: [Simmons Drums] SDS-3 trimmers
> >
> >
> >
> > OK. So now after sorting one silent voice (CA3086 was the culprit) I
> have another silent voice to sort (which was working fine before I tried
> to sort the first voice...).
> > When tweaking the trimmer beside the Impact knob something like a
> resonance started to appear. This is when I understood something that is
> probably obvious to most of you that there is no oscillator per se in a
> SDS-III module but more exactly a self-oscillating filter, right ?
> > Pitch standing for cutoff frequency, which becomes very obvious when
> switching from Tone to Noise.
> > So as I said, when I tweaked the trimmer beside the Impact knob a
> resonance started to appear but very unstable. As long as I could hear
> it the voice worked again but then after some time the oscillation/Tone
> became even more unstable and disappeared again. And now impossible to
> make it come back even when tweaking that trimmer. The noise is also silent.
> > Would anyone have any idea what could be happening ?
> >
> > --- In Simmons_Drums@yahoogroups.com
> <mailto:Simmons_Drums%40yahoogroups.com>, "scistudio440" <nuipb@> wrote:
> > >
> > > Vielen Dank !
> > >
> > > --- In Simmons_Drums@yahoogroups.com
> <mailto:Simmons_Drums%40yahoogroups.com>, "Michael Buchner"
> <buchnerelectronics@> wrote:
> > > >
> > > > The one near Impact is the filter symmetric (you can remove the
> distortion, but there isn't any). The one near bend up down is the
> adjustment of the VCA input, removing the DC pop. WITH DC pop it sounds
> better :-)
> > > > Near the master output slider is one trimmer to adjust the range
> of the RUN generator.
> > > >
> > > > Best
> > > >
> > > > Michael
> > > >
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: scistudio440
> > > > To: Simmons_Drums@yahoogroups.com
> <mailto:Simmons_Drums%40yahoogroups.com>
> > > > Sent: Wednesday, July 31, 2013 12:59 PM
> > > > Subject: [Simmons Drums] SDS-3 trimmers
> > > >
> > > >
> > > >
> > > > Hi list,
> > > >
> > > > Would anyone know what are the trimmer beside the Impact Click
> level and the trimmer beside the Bend level for ? And also the one
> beside the Output level slider ?
> > > >
> > > > Thanks for your help,
> > > > Phil
>