SV: Re: [sdiy] An OB-Mx I haven't seen before

[karl dalen]

I would like to change a thing the , LM3080 seams to be used for the
SEM filter and not the output stage.

KD

--- karl dalen <dalenkarl at yahoo.se> skrev:

> This one sounds different!
> 
> It's a very much different design!
> It seams that they uses CA3080 on the final VCA and instead
> of the SSM2024 there is plenty of PA381's! And discrete transistors
> instead of a array in the MM copy VCF!
> 
> And the VCO is not 3372, instead a semi discrete thing with 3046 as expo!!
> This looks lik a "single voice" card based system instead of Buchlas dual
> voice!
> 
> If im wrong i will gently take my hat and leave the building!
> 
> > aron wrote:
> > I can take some photos of the production boards if that is of interest.'
> 
> yes do some fine resolution closeups!
> 
> KD
> 
> 
> --- Aaron Lanterman <lanterma at ece.gatech.edu> skrev:
> 
> > 
> > On Tue, 24 Oct 2006, Jay wrote:
> > 
> > > klosmon wrote:
> > >
> > >> Photos here: http://www.analogsynthservice.com/aux2
> > 
> > Interesting... the production OB-Mx boards are much more crowded. I've 
> > sometimes wondered if that leads to heat problems and hence the quirky 
> > tuning of the production OB-MXes.
> > 
> > Another thing I notice is the production OB-Mx uses a lot of resistor 
> > packs, whereas I don't see any here.
> > 
> 
> > 
> > Everything is dated August or Sept 92; I wonder how that relates to 
> > Buchla's dates on the project.
> > 
> > - Aaron
> > 
> > 
> > 
> 
>