Cgs synth

My all time favourite Serge function block , DUSG rocks.



________________________________
From: Rico Loverde <ricoloverde@...>
To: cgs_synth@yahoogroups.com
Sent: Thursday, October 11, 2012 1:51 PM
Subject: Re: [cgs_synth] Re: CGS114 DUSG problems/troubleshooting

awesome!!!

On Wed, Oct 10, 2012 at 7:26 PM, ch1nard <steve.benesko@...> wrote:

> **
>
>
>
> okay awesome, that was totally it
>
> Now other than the fact that i have the pots wired backwards DUSG seems
> functional!
>
> --- In cgs_synth@yahoogroups.com, "ch1nard" <steve.benesko@...> wrote:
> >
> > ah yes, you appear to be correct good sir :)
> > this would be reverse orientation for all trannies? (2N3904 and 2N3906)
> >
> > i will switch them around after i get home from work and see if that
> fixes things up.
> >
> > might need to hit up the parts store on the way home in case i pooched
> any of them from being in backwards
> >
> > --- In cgs_synth@yahoogroups.com, sasami@ wrote:
> > >
> > > Also make sure you are using the right sort of tranny! I had people
> with
> > > this problem on another project - and they had used the wrong sort of
> tranny.
> > >
> > > >Are the trannies situated like the silk screen on the pcb or
> reversed? They
> > > >should be reversed.
> > > >
> > > >
> > > >
> > > >On Tuesday, October 9, 2012, ch1nard wrote:
> > > >
> > > >> **
> > > >>
> > > >>
> > > >> Okay, i have been staring at this for almost a week without making
> any
> > > >> progress so its time to start asking around for help on figuring
> out what
> > > >> might be wrong with my DUSG build
> > > >>
> > > >> I am running this off +/-15v power supply and i have all the
> connections
> > > >> appear to be correct with no magic smoke escaping
> > > >>
> > > >> What is happening is that the output lights are lit up constantly.
> > > >> When i hook it up to a scope it appears that both halves are cycling
> > > >> (triangle) at about only 300mV p/p
> > > >> -fiddling with the rise/fall gives minor variations but is still a
> > > >> triangle. (never hits saw or ramp)
> > > >> -feeding LFO into VC in shows the same minor variances as fiddling
> with
> > > >> the rise/fall knobs. bipolar control seems to work
> > > >> -feeding a signal IN combines the signal with this triangle
> oscillation
> > > >> -trig and end do nothing
> > > >>
> > > >> now everything 'appears' to be wired up correctly and there were a
> couple
> > > >> of lifted pads that i was able to jumper patch around.
> > > >> building this as part of a 'best of cgs' BOG panel, so the wiring
> is well
> > > >> documented.
> > > >>
> > > >> I have verified +/- voltage being delivered to all the TL072's and
> > > >> verified + voltage for the LM3900's
> > > >> ground appears to be delivered as well.
> > > >> all the trans are correct value and orientation (2N3904 and 2N3906)
> where
> > > >> applicable
> > > >>
> > > >> Anyways, eyes are too tired to look at this anymore tonight...
> > > >> time to smoke a bowl and watch some doctor who.
> > > >>
> > > >>
> > > >>
> > > >
> > > >
> > > >--
> > > >________________
> > > >rico loverde
> > > >415.596.6255
> > > >ricoloverde.com
> > > >
> > > >
> > > >[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@ otherunicorn@
> > > Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> > > Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/
> >
> > >
> >
>
>
>



--
________________
rico loverde
415.596.6255
ricoloverde.com


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------------------------------------

The CGS Modular Synth home page: http://www.cgs.synth.net/
Yahoo! Groups Links



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