Cgs synth

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]

>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
>
>
>
>

--- 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/>
>

--- 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/>
> >
>

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


[Non-text portions of this message have been removed]



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

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



[Non-text portions of this message have been removed]

On 2012-10-11, at 12:06 AM, Stephen Richards <okayjustalittle@...> wrote:

> 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
>
> [Non-text portions of this message have been removed]
>
> ------------------------------------
>
> The CGS Modular Synth home page: http://www.cgs.synth.net/
> Yahoo! Groups Links
>
> [Non-text portions of this message have been removed]
>
>


[Non-text portions of this message have been removed]

--- In cgs_synth@yahoogroups.com, richmolindarius@... wrote:
>
> Fully agreed. The USG is my fave by far with the SSG following up in a close 2nd. :D
>
> On 2012-10-11, at 12:06 AM, Stephen Richards wrote:
>
> > My all time favourite Serge function block , DUSG rocks.
> >
> > ________________________________
> > From: Rico Loverde
> > 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 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" 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
> > > > > Australian Miniature Horses & Ponies
> > >
> > > > >
> > > >
> > >
> > >
> > >
> >
> > --
> > ________________
> > 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
> >
> > [Non-text portions of this message have been removed]
> >
> >
>
>
> [Non-text portions of this message have been removed]
>

>Not sure if this is the best way to do this ? but figured if someone in the

>
>Anyhow, i have 1 (1/2 of the board) of my dusg's working perfectly and the

>The problem is no recognition of a trigger input or signal in for that

>
>These are the things i have checked/verified against the working half:
>
>-All ic;s getting and sending the same voltages as working half
>-Diode orientations
>-resitor values
>-Transistor orientation,proper part,voltages the same as working half
>-continuity through path of trig in to output
>-checked for solder bridges
>
>I'm out of ideas so i will really appreciate it if someone has some advice !
>
>Thanks, Tony
>
>--- In cgs_synth@yahoogroups.com, richmolindarius@... wrote:
>>
>> Fully agreed. The USG is my fave by far with the SSG following up in a

>>
>> On 2012-10-11, at 12:06 AM, Stephen Richards wrote:
>>
>> > My all time favourite Serge function block , DUSG rocks.
>> >
>> > ________________________________
>> > From: Rico Loverde
>> > 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 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" 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

>> > > > > >> (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

>> > > 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
>> > > > > Australian Miniature Horses & Ponies
> > > >
>> > > > >
>> > > >
>> > >
>> > >
>> > >
>> >
>> > --
>> > ________________
>> > 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
>> >
>> > [Non-text portions of this message have been removed]
>> >
>> >
>>
>>
>> [Non-text portions of this message have been removed]
>>
>
>
>
>
>------------------------------------
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>Yahoo! Groups Links
>
>
>
>

--- In cgs_synth@yahoogroups.com, "adematteo" wrote:
>
> Not sure if this is the best way to do this ? but figured if someone in the future searches better to have a few problems in 1 thread.
>
> Anyhow, i have 1 (1/2 of the board) of my dusg's working perfectly and the other not working at all as expected.
> The problem is no recognition of a trigger input or signal in for that matter unless i have the fall pot full cw then it seems to go into a slow self cycling.It needs a trigger to start this but does not sync with the trigger at all.As soon as i back off to about 2-3 o'clock it stops.
>
> These are the things i have checked/verified against the working half:
>
> -All ic;s getting and sending the same voltages as working half
> -Diode orientations
> -resitor values
> -Transistor orientation,proper part,voltages the same as working half
> -continuity through path of trig in to output
> -checked for solder bridges
>
> I'm out of ideas so i will really appreciate it if someone has some advice !
>
> Thanks, Tony
>
> --- In cgs_synth@yahoogroups.com, richmolindarius@ wrote:
> >
> > Fully agreed. The USG is my fave by far with the SSG following up in a close 2nd. :D
> >
> > On 2012-10-11, at 12:06 AM, Stephen Richards wrote:
> >
> > > My all time favourite Serge function block , DUSG rocks.
> > >
> > > ________________________________
> > > From: Rico Loverde
> > > 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 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" 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
> > > > > > Australian Miniature Horses & Ponies
> > > >
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > > --
> > > ________________
> > > 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
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>

--- In cgs_synth@yahoogroups.com, "Mongo" wrote:
>
> I have had trouble getting DUSGs to work as well, and there is a technique I've found that seems to help quite a lot.
>
> I print out the picture Ken has on the webpage that shows the PC board traces. I then sit down with that page, a highlighter, the pc board, and an ohmmeter, and I check every single trace for continuity. The traces on these boards are somewhat fragile, especially if you use lead free solder (which requires higher temperatures). Just be patient and you can get through the whole thing in an hour or two. Whenever I've had a DUSG failure, this has found the problem for me.
>
> That being said, I'm troubleshooting a friend's VCS right now, and this hasn't helped a bit ;-)
>
> Anyway, give that a try. Chances are you will find an open trace.
>
> Gary
>
>
> --- In cgs_synth@yahoogroups.com, "adematteo" wrote:
> >
> > Not sure if this is the best way to do this ? but figured if someone in the future searches better to have a few problems in 1 thread.
> >
> > Anyhow, i have 1 (1/2 of the board) of my dusg's working perfectly and the other not working at all as expected.
> > The problem is no recognition of a trigger input or signal in for that matter unless i have the fall pot full cw then it seems to go into a slow self cycling.It needs a trigger to start this but does not sync with the trigger at all.As soon as i back off to about 2-3 o'clock it stops.
> >
> > These are the things i have checked/verified against the working half:
> >
> > -All ic;s getting and sending the same voltages as working half
> > -Diode orientations
> > -resitor values
> > -Transistor orientation,proper part,voltages the same as working half
> > -continuity through path of trig in to output
> > -checked for solder bridges
> >
> > I'm out of ideas so i will really appreciate it if someone has some advice !
> >
> > Thanks, Tony
> >
> > --- In cgs_synth@yahoogroups.com, richmolindarius@ wrote:
> > >
> > > Fully agreed. The USG is my fave by far with the SSG following up in a close 2nd. :D
> > >
> > > On 2012-10-11, at 12:06 AM, Stephen Richards wrote:
> > >
> > > > My all time favourite Serge function block , DUSG rocks.
> > > >
> > > > ________________________________
> > > > From: Rico Loverde
> > > > 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 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" 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
> > > > > > > Australian Miniature Horses & Ponies
> > > > >
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > > --
> > > > ________________
> > > > 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
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
>

--- In cgs_synth@yahoogroups.com, "adematteo" wrote:
>
> Thanks Gary i'll give that a shot.Your right i did use lead free solder and it's very difficult to tell if you have a nice joint so this technique will be helpful.
>
> Thanks Ken but i've checked the wiring so many times i have it memorized.
>
> I'll report back when i get this bugger working.
>
> Tony
>
> --- In cgs_synth@yahoogroups.com, "Mongo" wrote:
> >
> > I have had trouble getting DUSGs to work as well, and there is a technique I've found that seems to help quite a lot.
> >
> > I print out the picture Ken has on the webpage that shows the PC board traces. I then sit down with that page, a highlighter, the pc board, and an ohmmeter, and I check every single trace for continuity. The traces on these boards are somewhat fragile, especially if you use lead free solder (which requires higher temperatures). Just be patient and you can get through the whole thing in an hour or two. Whenever I've had a DUSG failure, this has found the problem for me.
> >
> > That being said, I'm troubleshooting a friend's VCS right now, and this hasn't helped a bit ;-)
> >
> > Anyway, give that a try. Chances are you will find an open trace.
> >
> > Gary
> >
> >
> > --- In cgs_synth@yahoogroups.com, "adematteo" wrote:
> > >
> > > Not sure if this is the best way to do this ? but figured if someone in the future searches better to have a few problems in 1 thread.
> > >
> > > Anyhow, i have 1 (1/2 of the board) of my dusg's working perfectly and the other not working at all as expected.
> > > The problem is no recognition of a trigger input or signal in for that matter unless i have the fall pot full cw then it seems to go into a slow self cycling.It needs a trigger to start this but does not sync with the trigger at all.As soon as i back off to about 2-3 o'clock it stops.
> > >
> > > These are the things i have checked/verified against the working half:
> > >
> > > -All ic;s getting and sending the same voltages as working half
> > > -Diode orientations
> > > -resitor values
> > > -Transistor orientation,proper part,voltages the same as working half
> > > -continuity through path of trig in to output
> > > -checked for solder bridges
> > >
> > > I'm out of ideas so i will really appreciate it if someone has some advice !
> > >
> > > Thanks, Tony
> > >
> > > --- In cgs_synth@yahoogroups.com, richmolindarius@ wrote:
> > > >
> > > > Fully agreed. The USG is my fave by far with the SSG following up in a close 2nd. :D
> > > >
> > > > On 2012-10-11, at 12:06 AM, Stephen Richards wrote:
> > > >
> > > > > My all time favourite Serge function block , DUSG rocks.
> > > > >
> > > > > ________________________________
> > > > > From: Rico Loverde
> > > > > 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 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" 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
> > > > > > > > Australian Miniature Horses & Ponies
> > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > > --
> > > > > ________________
> > > > > 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
> > > > >
> > > > > [Non-text portions of this message have been removed]
> > > > >
> > > > >
> > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > >
> >
>

>
>Ok, i tried the suggestion Gary gave me and unfortunately no luck but thank

>
>I'm completely in the dark at this point so i want to explain whats

>
>It will self cycle but only at it's own fixed pace and does not react to

>It also outputs a pulse at the end of cycle.
>
>I've checked every single thing i can think of against the working half and

>
>Thanks for all the help and suggestions so far !
>
>-Tony
>--- In cgs_synth@yahoogroups.com, "adematteo" wrote:
>>
>> Thanks Gary i'll give that a shot.Your right i did use lead free solder

>>
>> Thanks Ken but i've checked the wiring so many times i have it memorized.
>>
>> I'll report back when i get this bugger working.
>>
>> Tony
>>
>> --- In cgs_synth@yahoogroups.com, "Mongo" wrote:
>> >
>> > I have had trouble getting DUSGs to work as well, and there is a

>> >
>> > I print out the picture Ken has on the webpage that shows the PC board

>> >
>> > That being said, I'm troubleshooting a friend's VCS right now, and this

>> >
>> > Anyway, give that a try. Chances are you will find an open trace.
>> >
>> > Gary
>> >
>> >
>> > --- In cgs_synth@yahoogroups.com, "adematteo" wrote:
>> > >
>> > > Not sure if this is the best way to do this ? but figured if someone

>> > >
>> > > Anyhow, i have 1 (1/2 of the board) of my dusg's working perfectly

>> > > The problem is no recognition of a trigger input or signal in for

>> > >
>> > > These are the things i have checked/verified against the working half:
>> > >
>> > > -All ic;s getting and sending the same voltages as working half
>> > > -Diode orientations
>> > > -resitor values
>> > > -Transistor orientation,proper part,voltages the same as working half
>> > > -continuity through path of trig in to output
>> > > -checked for solder bridges
>> > >
>> > > I'm out of ideas so i will really appreciate it if someone has some

>> > >
>> > > Thanks, Tony
>> > >
>> > > --- In cgs_synth@yahoogroups.com, richmolindarius@ wrote:
>> > > >
>> > > > Fully agreed. The USG is my fave by far with the SSG following up

>> > > >
>> > > > On 2012-10-11, at 12:06 AM, Stephen Richards wrote:
>> > > >
>> > > > > My all time favourite Serge function block , DUSG rocks.
>> > > > >
>> > > > > ________________________________
>> > > > > From: Rico Loverde
>> > > > > 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 wrote:
>> > > > >
>> > > > > > **
>> > > > > >
>> > > > > >
>> > > > > >
>> > > > > > okay awesome, that was totally it
>> > > > > >
>> > > > > > Now other than the fact that i have the pots wired backwards

>> > > > > > functional!
>> > > > > >
>> > > > > > --- In cgs_synth@yahoogroups.com, "ch1nard" wrote:
>> > > > > > >
>> > > > > > > ah yes, you appear to be correct good sir :)
>> > > > > > > this would be reverse orientation for all trannies? (2N3904

>> > > > > > >
>> > > > > > > i will switch them around after i get home from work and see

>> > > > > > fixes things up.
>> > > > > > >
>> > > > > > > might need to hit up the parts store on the way home in case

>> > > > > > 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

>> > > > > > with
>> > > > > > > > this problem on another project - and they had used the

>> > > > > > 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

>> > > > > > any
>> > > > > > > > >> progress so its time to start asking around for help on

>> > > > > > 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

>> > > > > > > > >> When i hook it up to a scope it appears that both halves

>> > > > > > > > >> (triangle) at about only 300mV p/p
>> > > > > > > > >> -fiddling with the rise/fall gives minor variations but

>> > > > > > > > >> triangle. (never hits saw or ramp)
>> > > > > > > > >> -feeding LFO into VC in shows the same minor variances

>> > > > > > 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

>> > > > > > couple
>> > > > > > > > >> of lifted pads that i was able to jumper patch around.
>> > > > > > > > >> building this as part of a 'best of cgs' BOG panel, so

>> > > > > > is well
>> > > > > > > > >> documented.
>> > > > > > > > >>
>> > > > > > > > >> I have verified +/- voltage being delivered to all the

>> > > > > > > > >> verified + voltage for the LM3900's
>> > > > > > > > >> ground appears to be delivered as well.
>> > > > > > > > >> all the trans are correct value and orientation (2N3904

>> > > > > > where
>> > > > > > > > >> applicable
>> > > > > > > > >>
>> > > > > > > > >> Anyways, eyes are too tired to look at this anymore

>> > > > > > > > >> 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
>> > > > > > > > Australian Miniature Horses & Ponies
>> > > > > >
>> > > > > > > >
>> > > > > > >
>> > > > > >
>> > > > > >
>> > > > > >
>> > > > >
>> > > > > --
>> > > > > ________________
>> > > > > 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
>> > > > >
>> > > > > [Non-text portions of this message have been removed]
>> > > > >
>> > > > >
>> > > >
>> > > >
>> > > > [Non-text portions of this message have been removed]
>> > > >
>> > >
>> >
>>
>
>
>
>
>------------------------------------
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>Yahoo! Groups Links
>
>
>
>

--- In cgs_synth@yahoogroups.com, sasami@... wrote:
>
> Swap the LF353 IC. See if the fault moves with the IC or stays where it is.
> Swap the transistors with a new set.
> Ken
>
> >
> >Ok, i tried the suggestion Gary gave me and unfortunately no luck but thank
> you for the useful tool.
> >
> >I'm completely in the dark at this point so i want to explain whats
> happening and maybe someone can have an idea as to what could be acting up.
> >
> >It will self cycle but only at it's own fixed pace and does not react to
> triggers or signal input.While cycling if i drop the voltage by decreasing
> the fall pot past about 2 o'clock it will stop cycling.The led flashes at
> about 1 second intervals regardless of were i position the pot as long as
> it's past the 2 o'clock point but when i'm measuring the voltage on the out
> it behaves how you would expect (at it's furthest cw setting it takes about
> 2-3 minutes to fully drop to zero) as long as i stay cw of 2 o'clock.
> >It also outputs a pulse at the end of cycle.
> >
> >I've checked every single thing i can think of against the working half and
> everything seems to be the same, even the voltages on all the ic's and
> transistors.
> >
> >Thanks for all the help and suggestions so far !
> >
> >-Tony
> >--- In cgs_synth@yahoogroups.com, "adematteo" wrote:
> >>
> >> Thanks Gary i'll give that a shot.Your right i did use lead free solder
> and it's very difficult to tell if you have a nice joint so this technique
> will be helpful.
> >>
> >> Thanks Ken but i've checked the wiring so many times i have it memorized.
> >>
> >> I'll report back when i get this bugger working.
> >>
> >> Tony
> >>
> >> --- In cgs_synth@yahoogroups.com, "Mongo" wrote:
> >> >
> >> > I have had trouble getting DUSGs to work as well, and there is a
> technique I've found that seems to help quite a lot.
> >> >
> >> > I print out the picture Ken has on the webpage that shows the PC board
> traces. I then sit down with that page, a highlighter, the pc board, and an
> ohmmeter, and I check every single trace for continuity. The traces on these
> boards are somewhat fragile, especially if you use lead free solder (which
> requires higher temperatures). Just be patient and you can get through the
> whole thing in an hour or two. Whenever I've had a DUSG failure, this has
> found the problem for me.
> >> >
> >> > That being said, I'm troubleshooting a friend's VCS right now, and this
> hasn't helped a bit ;-)
> >> >
> >> > Anyway, give that a try. Chances are you will find an open trace.
> >> >
> >> > Gary
> >> >
> >> >
> >> > --- In cgs_synth@yahoogroups.com, "adematteo" wrote:
> >> > >
> >> > > Not sure if this is the best way to do this ? but figured if someone
> in the future searches better to have a few problems in 1 thread.
> >> > >
> >> > > Anyhow, i have 1 (1/2 of the board) of my dusg's working perfectly
> and the other not working at all as expected.
> >> > > The problem is no recognition of a trigger input or signal in for
> that matter unless i have the fall pot full cw then it seems to go into a
> slow self cycling.It needs a trigger to start this but does not sync with
> the trigger at all.As soon as i back off to about 2-3 o'clock it stops.
> >> > >
> >> > > These are the things i have checked/verified against the working half:
> >> > >
> >> > > -All ic;s getting and sending the same voltages as working half
> >> > > -Diode orientations
> >> > > -resitor values
> >> > > -Transistor orientation,proper part,voltages the same as working half
> >> > > -continuity through path of trig in to output
> >> > > -checked for solder bridges
> >> > >
> >> > > I'm out of ideas so i will really appreciate it if someone has some
> advice !
> >> > >
> >> > > Thanks, Tony
> >> > >
> >> > > --- In cgs_synth@yahoogroups.com, richmolindarius@ wrote:
> >> > > >
> >> > > > Fully agreed. The USG is my fave by far with the SSG following up
> in a close 2nd. :D
> >> > > >
> >> > > > On 2012-10-11, at 12:06 AM, Stephen Richards wrote:
> >> > > >
> >> > > > > My all time favourite Serge function block , DUSG rocks.
> >> > > > >
> >> > > > > ________________________________
> >> > > > > From: Rico Loverde
> >> > > > > 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 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" 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
> >> > > > > > > > Australian Miniature Horses & Ponies
> >> > > > > >
> >> > > > > > > >
> >> > > > > > >
> >> > > > > >
> >> > > > > >
> >> > > > > >
> >> > > > >
> >> > > > > --
> >> > > > > ________________
> >> > > > > 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
> >> > > > >
> >> > > > > [Non-text portions of this message have been removed]
> >> > > > >
> >> > > > >
> >> > > >
> >> > > >
> >> > > > [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
> Australian Miniature Horses & Ponies
>

On 2013-01-09 6:39 PM, <sasami@...> wrote:

**




>HOLY COW, i figured it out and i want to tell you guys but i really hope
this doesn't earn me som...
Last year I was fixing on of JH's phasers with the two lightbulbs in it. One
globe failed, so I hunted around until I found a couple of matching 6V
globes and whacked them in. I had the same sort of problem. Damn thing kept
flashing at the wrong rate. I had used a pair of flashing globes.....


>
>Some how i used an led that is i believe a flashing led, i'm not quite sure
but it does look to ...
Yup, that's a flashing LED. It probably also has a very short third leg.

Ken


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




[Non-text portions of this message have been removed]

--- In cgs_synth@yahoogroups.com, sasami@... wrote:
>
> >HOLY COW, i figured it out and i want to tell you guys but i really hope
> this doesn't earn me some sort of nickname because i'm pretty sure this may
> be a first.
>
> Last year I was fixing on of JH's phasers with the two lightbulbs in it. One
> globe failed, so I hunted around until I found a couple of matching 6V
> globes and whacked them in. I had the same sort of problem. Damn thing kept
> flashing at the wrong rate. I had used a pair of flashing globes.....
> >
> >Some how i used an led that is i believe a flashing led, i'm not quite sure
> but it does look to have a small black thing (ic ?) inside.
>
> Yup, that's a flashing LED. It probably also has a very short third leg.
>
> Ken
> _______________________________________________________________________
> Ken Stone sasami@... otherunicorn@...
> Modular Synth PCBs for sale
> Australian Miniature Horses & Ponies
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