Yahoo Groups archive

Cgs synth

Index last updated: 2026-04-28 23:16 UTC

Thread

CGS29 Wave Multiplier Panel 1B Wiring Question

CGS29 Wave Multiplier Panel 1B Wiring Question

2015-12-08 by martindesalliers

Hello


I am building the CGS/Serge Panel 1B and couldn't find any information regarding wiring.


In the folder section, is the VC section for the VC folds plug and pot? Or is it for the VC folds plug and Manual folds pot?


In the lockhart section, what is the chain switch for? How is it wired?


Thanks for you help!


Martin

Re: CGS29 Wave Multiplier Panel 1B Wiring Question

2015-12-08 by Stephen Richards

Are you referring to the #3 panel on this page ?

MUFF WIGGLER :: View topic - Best of CGS Build Thread
MUFF WIGGLER :: View topic - Best of CGS Build Thread
FAQ & Terms Of Use MW Radio MW News MW Store Search Sign up Log in WIGGLING 'LITE' IN GUEST MODE Best of CGS Build Thread MUFF WIGGLER...
View on www.muffwiggler.com
Preview by Yahoo

I found the Implementation of the CGS29 in this panel a bit weird and ended up swapping it out for a CGS113.
This could have been due to construction error on my part due to long hours of soldering with no breaks. It was also my first CGS panel build.
Anyway , i was happy i changed it on this panel.
I find the implementation of the CGS29 on the BOG excellent though...

As Ken says you be best to contact Jon from the Human Comparator - (Zthee on Muffs). He's pretty busy with the TTSH and other projects though. Good Luck.

Show quoted textHide quoted text
From: "otherunicorn@... [cgs_synth]" <cgs_synth@yahoogroups.com>
To: cgs_synth@yahoogroups.com
Sent: Wednesday, December 9, 2015 9:33 AM
Subject: [cgs_synth] Re: CGS29 Wave Multiplier Panel 1B Wiring Question

you may find more information on Muffwiggler.com, or by asking the person who designed the panels.

Ken


4-stage Sequencer Problems

2015-12-08 by Neil Baldwin

Just finished wiring up one of two four-stage sequencers and on initial testing:

- all of the stage LEDs stay lit regardless of any clock input
- clock input doesn't seem to advance the steps in either direction

Any pointers?

Thanks,

Neil

Sent from BlueMail

Show quoted textHide quoted text

Re: 4-stage Sequencer Problems

2015-12-09 by Ken Stone

Look for wiring errors :) Seriously, start on the common board, and check around the current source - the "C" bus.
Show quoted textHide quoted text
On Wed, Dec 9, 2015 at 10:06 AM, Neil Baldwin neil.a.Baldwin@... [cgs_synth] <cgs_synth@yahoogroups.com> wrote:

Just finished wiring up one of two four-stage sequencers and on initial testing:

- all of the stage LEDs stay lit regardless of any clock input
- clock input doesn't seem to advance the steps in either direction

Any pointers?

Thanks,

Neil

Sent from BlueMail




--
Ken Stone otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>

Re: CGS29 Wave Multiplier Panel 1B Wiring Question

2015-12-09 by Julien Pauty

This is how I would wire it:
- offset pot -VE, OFS, +VE
- pot above offset pot: -VE, MAN, +VE so that you can control the folding manually.
- The VC jack => VC Folds

Chain is probably to send the lockart folder out (OUT) to the input of the main folder (TR IN). Wire on the middle connector of the switch and the other on one of the remaining side connectors.

I took inspiration from this which is for the BOG: http://www.diophantine.net/synth/bocgs/bocgs-wiring.html

Cheers,

Julien

2015-12-08 23:46 GMT+01:00 Stephen Richards okayjustalittle@... [cgs_synth] <cgs_synth@yahoogroups.com>:

Are you referring to the #3 panel on this page ?

MUFF WIGGLER :: View topic - Best of CGS Build Thread
MUFF WIGGLER :: View topic - Best of CGS Build Thread
FAQ & Terms Of Use MW Radio MW News MW Store Search Sign up Log in WIGGLING 'LITE' IN GUEST MODE Best of CGS Build Thread MUFF WIGGLER...
Preview by Yahoo

I found the Implementation of the CGS29 in this panel a bit weird and ended up swapping it out for a CGS113.
This could have been due to construction error on my part due to long hours of soldering with no breaks. It was also my first CGS panel build.
Anyway , i was happy i changed it on this panel.
I find the implementation of the CGS29 on the BOG excellent though...

As Ken says you be best to contact Jon from the Human Comparator - (Zthee on Muffs). He's pretty busy with the TTSH and other projects though. Good Luck.

Show quoted textHide quoted text
From: "otherunicorn@... [cgs_synth]" <cgs_synth@yahoogroups.com>
To: cgs_synth@yahoogroups.com
Sent: Wednesday, December 9, 2015 9:33 AM
Subject: [cgs_synth] Re: CGS29 Wave Multiplier Panel 1B Wiring Question

you may find more information on Muffwiggler.com, or by asking the person who designed the panels.

Ken



Re: CGS29 Wave Multiplier Panel 1B Wiring Question

2015-12-09 by martindesalliers

Thank you all for the replies! I will search on muffwiggler for more details.

Julien, the way you wire it seem to be the best choice. It is just sad to lose the POT to adjust the Folds input level. In the other hand, if i use this POT to adjust the level, i lose the oportunity to use the manual folds.
For the chain switch, i was wondering which processors can be chained. There is 3 processors on the cgs29, the grinder, the main folder and the lockhart...

Thank a lot!

Martin

Re: 4-stage Sequencer Problems

2015-12-09 by neilbaldwin70

Thanks Ken.

Made some progress (it helps if you put the correct BC547/557s in the right places - not sure how I missed that one!)

Still not right though and I've redone the GHJ and C + wiring (I had to remove it to replace the few erroneous transistors) so there's definitely nothing amiss there.

Now I have these problems:

- still doesn't advance the sequencer step sending a gate/pulse to the UP input on the common board
- seems to advance backwards if a pulse is sent to DOWN with the caveat that when it gets to step 1 it doesn't loop back to 4
- you can select stages 1, 2 and 3 with the push buttons OK but when you select stage 4, on letting go of the push button, stage 2 is immediately selected

I'll keep plugging away but if any of that rings a bell, a pointer or two would be the saviour of my sanity right now! :)

Cheers,

Neil

Re: 4-stage Sequencer Problems

2015-12-09 by Ken Stone

Keep plugging away. The Stage 4 problem may be a fault on any of the stages.
Show quoted textHide quoted text
On Thu, Dec 10, 2015 at 9:24 AM, neil.a.Baldwin@... [cgs_synth] <cgs_synth@yahoogroups.com> wrote:

Thanks Ken.


Made some progress (it helps if you put the correct BC547/557s in the right places - not sure how I missed that one!)

Still not right though and I've redone the GHJ and C + wiring (I had to remove it to replace the few erroneous transistors) so there's definitely nothing amiss there.

Now I have these problems:

- still doesn't advance the sequencer step sending a gate/pulse to the UP input on the common board
- seems to advance backwards if a pulse is sent to DOWN with the caveat that when it gets to step 1 it doesn't loop back to 4
- you can select stages 1, 2 and 3 with the push buttons OK but when you select stage 4, on letting go of the push button, stage 2 is immediately selected

I'll keep plugging away but if any of that rings a bell, a pointer or two would be the saviour of my sanity right now! :)

Cheers,

Neil




--
Ken Stone otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>

Re: CGS29 Wave Multiplier Panel 1B Wiring Question

2015-12-09 by Julien Pauty

Regarding the chaining. You could use an ON OFF ON switch and have two chain possibilty. Put the out of the grinder on the first outer switch connector. Put the out of the lockart on the other external connector of the switch. Put the tri in of the main folder on the central connector. In the middle possition you would have no link. The two other position would give you two type of chain: lockhart->folder or grinder->folder .Pretty neat !
Show quoted textHide quoted text
2015-12-09 19:43 GMT+01:00 martindesalliers@... [cgs_synth] <cgs_synth@yahoogroups.com>:

Thank you all for the replies! I will search on muffwiggler for more details.


Julien, the way you wire it seem to be the best choice. It is just sad to lose the POT to adjust the Folds input level. In the other hand, if i use this POT to adjust the level, i lose the oportunity to use the manual folds.
For the chain switch, i was wondering which processors can be chained. There is 3 processors on the cgs29, the grinder, the main folder and the lockhart...

Thank a lot!

Martin


Re: 4-stage Sequencer Problems

2015-12-09 by neilbaldwin70

I've visually checked all the resistors, all the diodes are the correct orientation, all polarised caps are correct. The only thing that I can't check is all the non-polarised caps as I mounted some of them with the legend facing into the back of the panel so can read them in situ. Are any of those critical to the problems I'm seeing?

I fear I'm going to just have to desolder all of the bus wiring and dismantle the whole thing. It's impossible to debug it while it's not assembled but it's also physically impossible to debug it while it's assembled in the panel - just not enough room between the boards to get tools in.

If there's anything you can suggest Ken it might save me a lot of extra work and a horrible desoldering job.


Re: 4-stage Sequencer Problems

2015-12-10 by Ken Stone

You could try removing it from the panel without desoldering it. That would allow you to flex it a little, and to gain access to the other side.

Ken

Show quoted textHide quoted text
On Thu, Dec 10, 2015 at 10:10 AM, neil.a.Baldwin@... [cgs_synth] <cgs_synth@yahoogroups.com> wrote:

I've visually checked all the resistors, all the diodes are the correct orientation, all polarised caps are correct. The only thing that I can't check is all the non-polarised caps as I mounted some of them with the legend facing into the back of the panel so can read them in situ. Are any of those critical to the problems I'm seeing?

I fear I'm going to just have to desolder all of the bus wiring and dismantle the whole thing. It's impossible to debug it while it's not assembled but it's also physically impossible to debug it while it's assembled in the panel - just not enough room between the boards to get tools in.

If there's anything you can suggest Ken it might save me a lot of extra work and a horrible desoldering job.





--
Ken Stone otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>

Re: 4-stage Sequencer Problems

2015-12-10 by neilbaldwin70

Finally sorted it!

Seems I had two bad LM393s in the last batch I bought. What are the chances of swapping one out, suspecting it to possibly be faulty, only to replace it with another brand new one that was also faulty!

Grrrr, dodgy Ebay source I suspect.

Thanks for the advice Ken. Onwards: there's another 4-stage sequencer to build now, along with trying to transplant two Barton Multi-Window Comparators into this project!

Neil

Re: 4-stage Sequencer Problems

2015-12-11 by Ken Stone

Chinese parts suppliers... Probably the correct devices salvaged from some piece of junk, and given a "once over" so they look like new.
What people do for money. It sucks.
Ken
Show quoted textHide quoted text
On Fri, Dec 11, 2015 at 5:22 AM, neil.a.Baldwin@... [cgs_synth] <cgs_synth@yahoogroups.com> wrote:

Finally sorted it!


Seems I had two bad LM393s in the last batch I bought. What are the chances of swapping one out, suspecting it to possibly be faulty, only to replace it with another brand new one that was also faulty!

Grrrr, dodgy Ebay source I suspect.

Thanks for the advice Ken. Onwards: there's another 4-stage sequencer to build now, along with trying to transplant two Barton Multi-Window Comparators into this project!

Neil




--
Ken Stone otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.