Cgs synth

The caps were to stop the op-amps oscillating, should that have been the
case. It apparently wasn't.

Pull out the 4051 if it is in a socket. The output should drop to zero. if
it doesn't, the problem is with the output buffer and the circuitry around
that - such as the mix input being fed a high voltage or a short somewhere.

If it does make a difference, the problem is either the 4051 itself, or an
error around it.

Ken

> Well I tried the capacitors but it didn't do anything. What are the
>capacitors for? Is there a certain part of the circuit I should look at for
>errors? Also the VCO pitches up quite a few octaves when I use my XR VCO's.
>When I try my Oakley and MOTM VCO's I cant even hear them since they go so
>far up.
>
>thanks
>pete
>
>On 2/8/07, sasami@... <sasami@...> wrote:
>>
>> Yes, you've probably made an error or two in construction. If everything
>> seems right, solder a 47pf capacitor between pins 1 and 2 of the TL072,
>> and
>> another between pins 6 and 7.
>>
>> Ken
>>
>> > I just finished wiring my Sequential switch and everything looks fine.
>> The
>> >LEDs cycle according to the clock input and the Reset and direction
>> switches
>> >work. The problem is that nothing comes out the Output. When I patch the
>> >output of the switch into the CV input of a VCO it just pitches the VCO a
>> >few octaves up but there are no steps. It just stays on one note and
>> >tweaking the pots does nothing. Any ideas what is wrong? Have I
>> overlooked
>> >something?
>> >
>> >Thanks
>> >pete
>> >
>> >--
>> >http://www.myspace.com/23isgood
>> >
>> >
>> >[Non-text portions of this message have been removed]
>> >
>> >
>> >
>> >The CGS Modular Synth home page: http://www.cgs.synth.net/
>> >
>> >Yahoo! Groups Links
>> >
>> >
>> >
>> >
>> _______________________________________________________________________
>> Ken Stone sasami@...
>> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
>> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>>
>>
>>
>> The CGS Modular Synth home page: http://www.cgs.synth.net/
>>
>> Yahoo! Groups Links
>>
>>
>>
>>
>
>
>--
>http://www.myspace.com/23isgood
>
>
>[Non-text portions of this message have been removed]
>
>
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
>
>
>
>

_______________________________________________________________________
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>