[sdiy] Simple, single supply VCA

[karl dalen]

And in between comes midway biased LM13700 who
should be both cheaper and a bit better.

KD

--- Den tors 2010-02-04 skrev mark verbos <mverbos at earthlink.net>:

> Från: mark verbos <mverbos at earthlink.net>
> Ämne: Re: [sdiy] Simple, single supply VCA
> Till: "Oren Leavitt" <obl64 at ix.netcom.com>
> Kopia: "SDIY List" <synth-diy at dropmix.xs4all.nl>
> Datum: torsdag 4 februari 2010 02.26
> The meeting point of the most
> expensive synth and the cheapest synth. The Paia 2700 VCA is
> very similar to the Buchla 110. It  transistors for the
> output output stage as well. The VCA in the 410 module
> cluster has an opamp output stage like the Paia, but it
> needs a -15 volt rail.
> 
> Mark
> 
> 
> 
> 
> On Feb 3, 2010, at 4:03 PM, Oren Leavitt wrote:
> 
> > 
> > 
> > Justin Owen wrote:
> >> Hello,
> >> I'm back to tinkering with single transistor-based
> VCA's - with mixed results.
> >> So I was wondering - if I was after a simple,
> single supply VCA schematic - nothing too fancy - but not
> bare-bones simple...
> >> ...what would you all suggest?
> >> Cheers - J.
> > 
> > Justin,
> > The PAiA 2720 VCA (3 NPN trasistors and a 748 op amp)
> seems like a good one to play with.
> > It is designed for the Gnd(0V)/+9V/+18V power supply
> of the 2720, but can probably be easily adapted to a single
> power supply.
> > 
> > http://www.synthdiy.com/files/2004/PAIA_2720-1_VCA.gif
> > 
> > It's a step up from the simpler 2-transistor Korg
> MS20/Roland JX3P design.
> > 
> > - Oren
> > _______________________________________________
> > Synth-diy mailing list
> > Synth-diy at dropmix.xs4all.nl
> > http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 

__________________________________________________
Använder du Yahoo!?
Är du trött på spam?  Yahoo! E-post har det bästa spamskyddet som finns 
http://se.mail.yahoo.com