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Cgs synth

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Re: Need some help with the Wavemultiplier CGS29 REV 2

2006-01-02 by sasami@hotkey.net.au

The board is correct. The board has been tested and works without any problems.

You will have either a bad solder joint, or a mis-read component, I suspect,
or you are running the internal VCA too quietly. The FOLDS CV input or knob
need to be increased.

Ken

>Hi all,
>
>I am new to this forum and I am relatively new to SDIY, too. I
>started building a modular synth about one year ago, knowing nothing
>at all. The first module I ever built was the Psycho LFO – a great,
>easy to build and very effective circuit.
>
>Now I run into some problems with the Wavemultiplier CGS29 REV 2. It
>seems to work but with a very, very low output. The PWM doesn´t work
>at all.
>So I checked all traces and values against the schematic and found
>that the schematic differs from the pcb layout?!.
>On the schematic pin1 of IC5 is connected to pin5 of IC4 (positive
>input) and pin1 of IC4 is connected to pin6 of IC4 (negative input),
>while on the pcb layout pins 5 and 6 of IC4 are interchanged. Might
>this be the cause of the circuit malfunction?
>
>Any comment is appreciated for I am willing to learn more about these
>things.
>
>Thank you all in advance
>
>Matthias Herrmann
>Germany
>
>
>
>
>
>
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
>
>
>
>
>
>
>
_______________________________________________________________________
Ken Stone sasami@... or sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

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