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Cgs synth

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Re: cgs29 wave multiplier problem

2012-11-13 by sasami@hotkey.net.au

Also check the input resistors along this chain. A too low a value or a
short would also have this effect.
Ken

>CA3080 is the same chip as LM3080.
>
>You have a problem with a feedback resistor somewhere. One of them is too
>high a value, or has a bad joint. It could be the 100k around IC5a, any of
>the 10ks on IC5b,c,d, and possibly, but not likely, the 10k around IC4c. I
>would start with the 100k and work backwards along the chain.
>
>Ken
>
>>The main folder section triangle and pulse outputs are identical. They are
>both outputting what I think is a 'squared' output. I don't have an
>oscilloscope, but with a fixed voltage or an lfo on the triangle input, the
>output switches between +/- 15 volts, nothing in between.
>>
>>The pulse width modulation section doesn't effect the output. The offset
>and folds cv sections are working correctly, which is what tricked me at
>first. The output voltage just switches between +/- 15 volts, but it does
>fold the original waveform, so that switching occurs at different points of
>the waveform. if that makes any sense
>
>_______________________________________________________________________
>Ken Stone sasami@... otherunicorn@...
>Modular Synth PCBs for sale <http://www.cgs.synth.net/>
>Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>
>
>
>------------------------------------
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>Yahoo! Groups Links
>
>
>
>
_______________________________________________________________________
Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

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