Cgs synth

Hi Jason.

The CGS46 is indeed a neat circuit, but the modded board needs to run
from a 0V to 9V DC supply. (that's an easy mod), and it will be in a
tiny enclosure along with a few other bits and bobs, so I was hoping to
find a way to tweak the circuit itself to have some sort of control
over the output gain......

I guess a passive voltage divider on the output should work, but I
thought I'd ask wiser heads than me if this was a good idea or not....

cheers,
Dave

On Nov 13, 2010, at 20:57, Jason Proctor wrote:

> could just use the CGS stompbox adapter :-)
>
> http://www.cgs.synth.net/modules/cgs46_sba.html
>
> >Hi all.
> >
> >Mad idea I know, but it's a request from a guitarist mate.
> >
> >As noise levels are not critical for his intended use, for power, I
> >guess I could use a resistor divider with a 9V battery to, generate
> >±4.5V, with the centre tap to GND on the PCB, and something like a
> 47uF
> >cap between the centre tap and 0V on the battery (which is now -4.5V
> on
> >the PCB)
> >
> >I 'll need to attenuate the level after the effect, which will have
> >quite a lot of gain, in order to approach unity gain. Question is,
> >keeping a 1K output impedance, how could I alter values in the
> circuit
> >to achieve this? I don't understand the circuit , and I guess I could
> >always do the obvious, and use a voltage divider at the output using
> >the 1K final output resistor as one half, and a pot or fixed resistor
> >to GND as the other half of the voltage divider, but I suspect that
> >might have a big effect on the output impedance - I don't know if
> >that's a real problem or not. The output will directly drive a guitar
> >combo input.
> >
> >Would such a voltage divider make potential problems for a guitarist?
> >
> >Any thoughts welcome
> >
> >
> >cheers,
> >Dave
> >
> >
> >
> >------------------------------------
> >
> >The CGS Modular Synth home page: http://www.cgs.synth.net/
> >Yahoo! Groups Links
> >
> >
> >
>
>