[sdiy] PAiA P9700S modular

[dustin sedlacek]

* VCFs tend to be a bit unstable at high-Q, with a tendency to break
into square-wave oscillation. There are some mods to mitigate this though.

Where are these mods ? i have not been able to find them :(




On 3/9/06, Eric Brombaugh <ebrombaugh at earthlink.net> wrote:
>
> I just finished building one of these. It took me about 2 weeks of
> evenings to do all the assembly but I've still got a bit more
> calibration left. I have a lot of experience with kit building and
> soldering though, so I'm not the best judge of the level of difficulty
> for beginners. I would say however that the quality of the kit is very
> high - instructions are detailed and sensible, components are decent
> quality although not the absolute best (think Ford, not Ferrari) and
> PCBs were easy to assemble. The most difficult part of this kit is
> probably the fly-wires from the PCB to the panel controls, and that's
> mostly just a matter of tedium - cutting wires to length, stripping
> them, etc.
>
> I made a few mistakes in the process, but they were easy to debug and
> all were obvious when I reviewed the checklists in the assembly manual -
> things I'd missed in haste. If you're methodical, read and follow the
> instructions carefully and have decent tools (temperature regulated
> small-tip soldering iron, good cutters, needlenose pliers and wire
> strippers) then you should have excellent results without too much pain.
>
> My thoughts summarized:
>
> Pro:
> * Good documentation
> * Good complement of basic functions (Midi-CV, VCOs, VCAs, VCFs, Noise,
> Ringmod, Modulators)
> * Lots of modulation sources that work either as Attack/Decay transient
> generators, or as LFOs with widely variable waveshapes.
>
> Con:
> * No Multis!
> * There have been some complaints about the VCOs tracking accurately to
> 1V/Octave.
> * Sine output of VCO A still has a fair amount of higher harmonic content.
> * VCFs tend to be a bit unstable at high-Q, with a tendency to break
> into square-wave oscillation. There are some mods to mitigate this though.
>
> I think it's a great starter for someone interested in modular synths. I
> can't imagine that any other DIY approach would be much easier or more
> cost effective.
>
> Eric
>
> Ezra Jacobs wrote:
> > Does anyone have experience with building the P9700S modular by PAiA?
> > For those that don't know this kit, you can find some info here:
> >
> > http://paia.com/p9700s.htm
> >
> > I'm thinking about building one, but because I have no previous
> > (serious) experience with soldering, I'm not sure if it will be a good
> > choice.
> > Should I go for a PAiA FatMan (or another DIY-synth) instead? Any
> > advice/experiences/other input is much appreciated!
> >
> > Thanks in advance,
> > -Ezra
>
>


--
Dustin
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20060309/45de8ec4/attachment.htm>