CGS76 - Serge Envelope Generator. END Output no working.
2015-12-28 by Stephen Richards
Hi All I was hoping i could get some insight on this problem. Everything else seems fine and i recently calibrated it again but still no END output.
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Re: CGS88 Bi-Dir Switch
2015-12-14 by Neil Baldwin
Sorted it, cheers Ken Sent from BlueMail On 14 Dec 2015, at 22:39, Neil Baldwin neil.a.baldwin@... > wrote: Thanks for replying so quickly! :) I'll give 1Ms a try. Sent from BlueMail On 14 Dec 2015, at 22:35, "Ken Stone otherunicorn@... [cgs_synth]" cgs_synth@yahoogroups.com > wr
Re: CGS88 Bi-Dir Switch
2015-12-14 by Neil Baldwin
Thanks for replying so quickly! :) I'll give 1Ms a try. Sent from BlueMail On 14 Dec 2015, at 22:35, "Ken Stone otherunicorn@... [cgs_synth]" cgs_synth@yahoogroups.com > wrote: You could probably get away with using 1M, or 1M8. I don't know why Serge chose 1M5. Looking at the dat
Re: CGS88 Bi-Dir Switch
2015-12-14 by Ken Stone
You could probably get away with using 1M, or 1M8. I don't know why Serge chose 1M5. Looking at the data sheet, we are no where near stressing the chip. Ken On Tue, Dec 15, 2015 at 9:06 AM, neil.a.Baldwin@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Ken, Is the value of the
CGS88 Bi-Dir Switch
2015-12-14 by neilbaldwin70
Ken, Is the value of the two 1M5 resistors critical on the trigger inputs? I've run out and wondered if I could replace with a pair of 1Ms? Thanks
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 On Fri, Dec 11, 2015 at 5:22 AM, neil.a.Baldwin@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Fina
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 K
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 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 r
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 sit
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 conn
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. 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 sur
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 noth
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
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
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. 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 sequenc
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
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 M
Re: CGS29 Wave Multiplier Panel 1B Wiring Question
2015-12-08 by cg_synth
you may find more information on Muffwiggler.com, or by asking the person who designed the panels. Ken
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 i
Re: CGS 64 VCA
2015-12-08 by hiko_goldenballs
Thank you very much for the link!
Re: CGS 64 VCA
2015-12-07 by Ken Stone
http://www.cgs.synth.net/modules/simple_transistor_matching.html On Tue, Dec 8, 2015 at 8:36 AM, hiko_goldenballs@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: I don't really know how to much it. All I know is put the transistors into a meter. Thanks -- Ken Stone otherunicor
Re: CGS 64 VCA
2015-12-07 by hiko_goldenballs
I don't really know how to much it. All I know is put the transistors into a meter. Thanks
Re: 1973 VCF resonance
2015-12-07 by Ken Stone
If you want something that really screams, you could try feeding some of its output back to its input via a mixer. The Steiner is also a much more "vicious" filter, although it can be temperamental. Ken On Mon, Dec 7, 2015 at 9:32 PM, Julien Pauty julien.pauty@... [cgs_synth] cgs
Re: 1973 VCF resonance
2015-12-07 by Julien Pauty
Thanks Ken, I checked my board and nothing struck my eyes. This is a log pot. I believe the filter works as expected, it's just that I was expecting a more dramatic effect. I do have resonance before the last 1/4, but the effect is quite subtle on the first half of the pot. I als
Re: CGS 64 VCA
2015-12-07 by Chris Juried
Hi, What method are you using to match your 548's? Curve Tracer? Meter with emitter referenced to shorted base/collector? Thanks. Sincerely, Chris Juried Audio Engineering Society (AES) Member InfoComm-Recognized AV Technologist http://www.juriedengineering.com (Juried Engineerin
Re: CGS 64 VCA
2015-12-06 by hiko_goldenballs
OK, it seems like the 548s are the cause of the problem, I will try to get it. Thanks for your quick reply. Cheers Hiko
Re: 1973 VCF resonance
2015-12-06 by Ken Stone
By the last quarter of the pot, the resonance should be getting pretty full-on. Did you use a log pot? Check for errors in your resistor values, etc. Most likely, there is an error somewhere there. If all seems okay, try reducing the value of the 68k connected to the wiper of the
Re: CGS 64 VCA
2015-12-06 by Ken Stone
The CV init trimmer should be able to trim it to a minimum level. Getting "perfect" silence is unlikely with any VCA. Failing to match the BC548s would probably cause your problem. Cheers, Ken On Sun, Dec 6, 2015 at 1:55 PM, hiko_goldenballs@... [cgs_synth] cgs_synth@yahoogroups.
CGS 64 VCA
2015-12-06 by hiko_goldenballs
Hello Ken and all. I've constructed the cgs 64 VCA. The thing is that an audio signal in the input can not be gain zero. I adjusted the CV INIT trimmer but the signal doesn't disappear. I could more or less perfectly eliminate the CV signal in the CV input by adjusting the trimme
1973 VCF resonance
2015-12-05 by Julien Pauty
Hello, On my 1973 VCF, the useful range on the resonance pot is quite limited. For the first 3/4 of the range the sound does not really change. Resonance appears only on the last 1/4 of the pot. Is that the expected behavior ? Cheers, Julien
Ray Wilson Cancer Fund
2015-12-02 by nn3nn3
Thanks to Ken for letting me post this here. As you may know, Ray Wilson (Music From Outer Space) has stage 4 bladder cancer that has spread to his kidney. A Go Fund Me account has been set up to help cover medical expenses. GFM does help focus on the fundraising but does take an
Re: DUSG Wiring
2015-11-23 by ithaib
Ahh right. Ok thanks.
Re: DUSG Wiring
2015-11-22 by Ken Stone
If the switch is on, don't insert anything into the input jack, as that would effectively short two outputs together. On Sun, Nov 22, 2015 at 2:43 PM, ithaib@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Finished it, what a great module. Only beginning to explore... Question
Re: DUSG Wiring
2015-11-22 by ithaib
Finished it, what a great module. Only beginning to explore... Question - I'd also like to add a switch that would short END to TRIG - would that be just an SPST switch that connects the tips of those two jacks? Anything unusual to consider when doing this? For example if the swi
Re: DUSG Wiring
2015-11-19 by babysealclub
You can always use a pull pot switch. Then you wouldn't need another hole.
Re: DUSG Wiring
2015-11-18 by ithaib
My panel is 5U with zero room for another jack, but I can definitely drill a hole for a switch.
Re: DUSG Wiring
2015-11-18 by oivind60
Use both of them. Drill an extra hole in the panel. I have six DUSGs in my system and four of them have both outputs. Or you can use a switch to toggle between DCO and BPO
Re: DUSG Wiring
2015-11-18 by Ken Stone
BPO was usually an optional extra. They charged $1 for adding another jack! On Wed, Nov 18, 2015 at 12:50 PM, ithaib@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: What I mean is I could use DCO for MAIN OUT and also wire D for BIPOLAR OUT. I suppose I should experiment.. --
Re: DUSG Wiring
2015-11-18 by ithaib
What I mean is I could use DCO for MAIN OUT and also wire D for BIPOLAR OUT. I suppose I should experiment..
Re: DUSG Wiring
2015-11-17 by ithaib
OK thanks, that clarifies things. So using either DCO or BPO for OUTPUT is personal preference? Do you guys ever wire one half of the pcb to DCO and the other to BPO? I do plan on using D so that I can have a BIPOLAR OUPUT. Wouldn't that cover the negative modulations as well? I
Re: DUSG Wiring
2015-11-17 by Julien Pauty
Regarding MA MB: follow the table and the diagrams at the top of the page. You can't really go wrong here. If the behavior of the switch is reversed when you test the circuit, simply invert the two wires, or turn the switch by half turn. DCO gives you a DC coupled signal which is
Re: DUSG Wiring
2015-11-17 by oivind60
If you look at the schematics you see that F and FA are the same, so no need for two wires. And FC is ground/ 0V About the rise/fall. Both schematics and wiring table are right. Schematics: When you turn the switch to "rise" in the sch. you connect ground to the "fall-side" and t
DUSG Wiring
2015-11-17 by ithaib
Hi all, I'm wiring up a DUSG PCB to my panel and following Ken's instructions on his site. Please correct if I'm wrong but: MB on the schematic is RISE MA on the schematic is FALL the Wiring table on the same page lists them the other way around. Which to follow? Also: DCO is MAI
Re: CGS66 PSU and 5V adapter
2015-10-30 by soon.wazoo
Thanks Ken! The question came out because I couldn't actually figure out how those adapters work, for it wasn't 100% clear whether they originated 5V by themselves or activated a pre-existing 5V filament as on Doepfer power rails: turns out the latter was false. :-(
Re: CGS66 PSU and 5V adapter
2015-10-30 by Ken Stone
I see no reason why the adapters would not work, other than if the total current drawn is more than the supply can handle. Keep an eye on the +VE regulator's heatsink. On Fri, Oct 30, 2015 at 4:47 AM, soon.wazoo@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Hi guys! I'm usin
CGS66 PSU and 5V adapter
2015-10-29 by soon.wazoo
Hi guys! I'm using this board Ken Stone's Modular Synthesizer with an eurorack system; I'm about to throw in a couple digital modules which use the 5V filament: would adapters like Mutable Instruments' Volt and Doepfer 100AD5+5 work with it? Ken Stone's Modular Synthesizer Descri
Re: CGS59 Sequencer AEP out
2015-10-19 by ijed78
Yes I'm going insane there was a 547 in there. Thanks Ken
Re: CGS59 Sequencer AEP out
2015-10-19 by Ken Stone
The pulse after that first 47k would go between 0 and 0.7V maximum. At that point it should turn on the transistor. The output of that transistor usually sits at +VE and will swing down to nearly 0V if that transistor is working correctly. The second transistor works in the same
CGS59 Sequencer AEP out
2015-10-19 by ijed78
Finally getting around to troubleshooting a few minor problems with my serge panels. First up was the SWAMP: The AEP out is sitting at a constant 1.5v and I can't see any pulses. If I scope the D line I can see the spikes - but when it hits the B board after the first 47k resisto
Re: extended resonant eq
2015-10-17 by x24holsey
Check out Ray Wilsons Vocoder @ MFOS 12 bands expandable to 22 or 24 if you are ambitious. http://www.musicfromouterspace.com/analogsynth_new/VOCODER2013/VOCODER2013.php http://www.musicfromouterspace.com/analogsynth_new/VOCOD... Complete instructions for building an envelope fol