SSG
2013-07-10 by meech
New lay out. wont go up into audio range when S to L jumper is in. cut the jumper & they cycle as VCOs/ no problem. Any recommendations ? Change the 33k & 15k resistors near the L pad ??? thanks in advance ! d
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Re: Patching the CGS75 Serge Voltage Controlled Slope. How to?
2013-07-07 by cg_synth
The processor is so you can have single-knob control of a CV through the range of unity gain, down to zero, then to unity gain, but inverted. Basically it is a complex level control. > >Ok mates, now everything is working and I know hot to patch, the CGS VCS is absolutelly Fantas
Re: Patching the CGS75 Serge Voltage Controlled Slope. How to?
2013-07-07 by ALFREDO
Ok mates, now everything is working and I know hot to patch, the CGS VCS is absolutelly Fantastic!! Just one more question : What to do with the processor? What is the utillity of the processor? Thanks to all of you for your help :-)
Re: Patching the CGS75 Serge Voltage Controlled Slope. How to?
2013-07-07 by ALFREDO
Ok mates, the CGS VCS is absolutelly Fantastic!! Just one more question : What to do with the processor? What is the utillity of the processor? Thanks to all of you for your help :-)
Re: VCS Transistors
2013-07-07 by cg_synth
Yes, but they must be installed in reverse to the package outline on the PCB. --- In cgs_synth@yahoogroups.com , "Mr. D" wrote: > > Will bc547 and bc557 work in the vcs? > > [Non-text portions of this message have been removed] >
VCS Transistors
2013-07-07 by Mr. D
Will bc547 and bc557 work in the vcs? [Non-text portions of this message have been removed]
Re: Patching the CGS75 Serge Voltage Controlled Slope. How to?
2013-07-02 by Christopher
The End Out is the Gate out. This can be patched back to the Trig input to create cycle. The Exponential input is 1 volt/octave. --- In cgs_synth@yahoogroups.com , "ALFREDO" wrote: > > Ok, thanks to all of you this is going well, I have the AR EG and ASR working and a king of squ
Re: Patching the CGS75 Serge Voltage Controlled Slope. How to?
2013-07-02 by ALFREDO
Ok, thanks to all of you this is going well, I have the AR EG and ASR working and a king of square lfo switching the cycle switch, but the CGS VCS it´s a different than the serge one, for example there´s no gate out in the CGS and no 1v/oct , maybe any equivalence? The Exp CV : 1
Re: Patching the CGS75 Serge Voltage Controlled Slope. How to?
2013-07-02 by Mongo
Hi Alfredo, As has been said, the VCS / DUSG are really more like swiss army knives. I currently have 6 USGs in my system, and I use them for EVERYTHING. One thing I especially love is using them for very fast envelopes for Low Pass Gates. You can make some fantastic percussion s
Re: Patching the CGS75 Serge Voltage Controlled Slope. How to?
2013-07-02 by ALFREDO
Thanks a lot Clarke, yes is very good starter!! --- In cgs_synth@yahoogroups.com , "clarkehome68" wrote: > > Hey Alfredo, > > There is a really good starter guide here: > > http://www.carbon111.com/alphabet1.html > > Have fun! > > - Clarke > > > --- In cgs_synth@yahoogroups.com ,
Re: Patching the CGS75 Serge Voltage Controlled Slope. How to?
2013-07-02 by Scott Young
Hi Alfredo, Here's a couple of good links that I refer to all the time: http://www.carbon111.com/alphabet1.html http://www.serge-fans.com/wiz_cv_trig.htm Like most of the Serge stuff it's not obvious to start off with, but it's so versatile once you get an idea what to do with it
Re: Patching the CGS75 Serge Voltage Controlled Slope. How to?
2013-07-02 by clarkehome68
Hey Alfredo, There is a really good starter guide here: http://www.carbon111.com/alphabet1.html Have fun! - Clarke --- In cgs_synth@yahoogroups.com , "ALFREDO" wrote: > > Hello and sorry for this stupid question. > I have a small diy modular sistem with the usual modules, vco´s,
Patching the CGS75 Serge Voltage Controlled Slope. How to?
2013-07-01 by ALFREDO
Hello and sorry for this stupid question. I have a small diy modular sistem with the usual modules, vco´s, filter, vca´s, adsr, mixer and a sh-101... and I want to go one step beyond with others mudules less usual like this CGS75 or the CGS29 Wave multiplier. I finished the VCS
Re: CGS04 as an audio mixer = Lost some level at output.
2013-07-01 by ALFREDO
Thanks a lot, now work perfect! --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > Increase the value of the resistor between pin 6 of the op-amp and the output. > 120k will give a little more gain. 200k will double the output. Or put a > trimmer in series with the 100k the
Re: Stero version of CGS 202 resonant eq
2013-06-30 by adematteo
Sure Terry, i sent you a message in your email. --- In cgs_synth@yahoogroups.com , "xiphiguy@..." wrote: > > Would you be willing to post photos of how you accomplished cutting the slots so accurately with your router and jig? I had assumed this would be impossible to do without
Re: Stero version of CGS 202 resonant eq
2013-06-28 by xiphiguy@frontier.com
Would you be willing to post photos of how you accomplished cutting the slots so accurately with your router and jig? I had assumed this would be impossible to do without professional level equipment. ~Terry --- In cgs_synth@yahoogroups.com , "adematteo" wrote: > > > Hi Terry, >
Re: Stero version of CGS 202 resonant eq
2013-06-27 by adematteo
Hi Terry, I did do the front panel.It's made out of birch plywood that's 1/8" thick.I was planning on doing it in aluminum but got a bit nervous about routing out the aluminum so tried it with the wood first to see if the jig i made was working correctly and realized once i mount
Re: Stero version of CGS 202 resonant eq
2013-06-27 by xiphiguy@frontier.com
The front panel looks very nice! Did you do that part yourself? ~Terry --- In cgs_synth@yahoogroups.com , "adematteo" wrote: > > > Well, i built it and for anyone interested i put i pic up in the photo's section. http://groups.yahoo.com/group/cgs_synth/photos/album/1538675616/pic
Re: Stero version of CGS 202 resonant eq
2013-06-26 by cg_synth
Looks very nice! Ken > >Well, i built it and for anyone interested i put i pic up in the photo's section. http://groups.yahoo.com/group/cgs_synth/photos/album/1538675616/pic/ 1794994871/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc > >Thanks so much Ken 1) for doin
Re: Stero version of CGS 202 resonant eq
2013-06-26 by adematteo
Well, i built it and for anyone interested i put i pic up in the photo's section. http://groups.yahoo.com/group/cgs_synth/photos/album/1538675616/pic/1794994871/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc Thanks so much Ken 1) for doing these boards and 2) for yo
CGS48 staircase generator question
2013-06-26 by synchroton
Hi, I was playing around with the staircase generator and had a few questions - When it comes to tuning the circuit, the page just says to tweak the trimmer until you get the best tracking range... I'm interested in using it as a suboscillator as well as a pulse divider (so, usin
Re: CGS 29 Wave multiplier Ver 2.2 Self oscillating
2013-06-26 by adematteo
Thanks Ken --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > >Well changing out the power supply seemed to do it. > > > >Do you have any ideas as to what would have gone bad on the other supply ? > > I'd guess it's kicking into current limit due to an incorrectly set trimm
Re: CGS 29 Wave multiplier Ver 2.2 Self oscillating
2013-06-26 by cg_synth
>Well changing out the power supply seemed to do it. > >Do you have any ideas as to what would have gone bad on the other supply ? I'd guess it's kicking into current limit due to an incorrectly set trimmer, or a failed electro in the smoothing section. Ken ______________________
Re: CGS 29 Wave multiplier Ver 2.2 Self oscillating
2013-06-26 by adematteo
Well changing out the power supply seemed to do it. Do you have any ideas as to what would have gone bad on the other supply ? Thanks again for coming to the rescue ! --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > >Thanks Ken, luckily i have a few more i can swap out. >
Re: CGS 29 Wave multiplier Ver 2.2 Self oscillating
2013-06-25 by cg_synth
>Thanks Ken, luckily i have a few more i can swap out. >I am getting correct voltages and the wave mult is doing it even when it's the only thing plugged in.When i plug in the rest of the bog panel everything works as it should. Odd! >--- In cgs_synth@yahoogroups.com , sasami@...
Re: CGS 29 Wave multiplier Ver 2.2 Self oscillating
2013-06-25 by adematteo
Thanks Ken, luckily i have a few more i can swap out. I am getting correct voltages and the wave mult is doing it even when it's the only thing plugged in.When i plug in the rest of the bog panel everything works as it should. --- In cgs_synth@yahoogroups.com , sasami@... wrote:
Re: CGS 29 Wave multiplier Ver 2.2 Self oscillating
2013-06-25 by cg_synth
Sounds like the PSU may be overloaded and/or faulty. >Hi guys, >I just switched my power supply for a new case i made and now my wave multiplier is oscillating and i can hear it from the power supply ? > >The power supply i'm using is the same model as the previous one i was usin
CGS 29 Wave multiplier Ver 2.2 Self oscillating
2013-06-25 by adematteo
Hi guys, I just switched my power supply for a new case i made and now my wave multiplier is oscillating and i can hear it from the power supply ? The power supply i'm using is the same model as the previous one i was using and all the wiring is the same exact wiring i was using
Re: CGS04 as an audio mixer = Lost some level at output.
2013-06-17 by cg_synth
Increase the value of the resistor between pin 6 of the op-amp and the output. 120k will give a little more gain. 200k will double the output. Or put a trimmer in series with the 100k there and adjust it. >Hello, please some help. >Please how I can get some more level at the outp
CGS04 as an audio mixer = Lost some level at output.
2013-06-17 by ALFREDO
Hello, please some help. Please how I can get some more level at the output or at least the same as input signal, I can route the out signal to other module but I preffer to have the mixer as more compact better. Any help appreciated. Thanks a lot.
Re: Troubleshooting CGS114 (Euroversion for WCMS)
2013-05-23 by Mongo
If my memory is correct, the transistors will need to be reversed. Gary --- In cgs_synth@yahoogroups.com , Jan Czmok wrote: > > Hi, > > After finishing the CGS64's i am now working on the CGS114 and got one of two "partially" working, and i'm wondering if somebody has an idea. >
Troubleshooting CGS114 (Euroversion for WCMS)
2013-05-12 by Jan Czmok
Hi, After finishing the CGS64's i am now working on the CGS114 and got one of two "partially" working, and i'm wondering if somebody has an idea. - fed into voltage: 12V - Wiring according http://cgs.synth.net/modules/cgs114_dusg.html and http://www.muffwiggler.com/forum/viewtopi
Re: CGS64 VCA Question
2013-05-07 by cg_synth
If the CV INIT trim isn't able to trim it out, I'd look at the discrete transistors. Make sure you have them in the right way around. >Hi, > >i am building up two CGS64 and after some initial issues, they "partially" work both on which i need some help: > >- powered 12V eurorack
CGS64 VCA Question
2013-05-07 by janczmok
Hi, i am building up two CGS64 and after some initial issues, they "partially" work both on which i need some help: - powered 12V eurorack - VCAs are SSM2210. - I can calibrate the CV bleed fine, - I can't cablibrate the "input muting" when there's no CV input, i am not getting i
Re: 1973 VCF - dc offset
2013-05-01 by goldencardigan
Edit: I've been able to reduce the offset swing to between +1v and 0v with the 'initial frequency' trimpot. Dean --- In cgs_synth@yahoogroups.com , "goldencardigan" wrote: > > Hi all, > > I've just finished building the serge filter and while everything looks and sounds like it i
1973 VCF - dc offset
2013-05-01 by goldencardigan
Hi all, I've just finished building the serge filter and while everything looks and sounds like it is working correctly, I have noticed a bit of dc offset on the lowpass output. With no input signal, the dc voltage swings between +4v through 0v and back to +1v as I turn the cutof
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-25 by Sean
Great to know... going to fix it tonight. What a relief :o) Ken, you're the best! Thank again, Sean --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > >Still waiting on the alternate LM3900s and the PN4250s I used are here... > > They would appear to be EBC pinout, which me
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-25 by cg_synth
>Still waiting on the alternate LM3900s and the PN4250s I used are here... They would appear to be EBC pinout, which means if you put the transistors in with the D in the same direction as the overlay, they will be backwards. Ken > > http://www.mouser.com/Search/ProductDetail.asp
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-25 by Sean
Still waiting on the alternate LM3900s and the PN4250s I used are here... http://www.mouser.com/Search/ProductDetail.aspx?R=PN4250Avirtualkey61000000virtualkey610-PN4250A -Sean --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > Looked it all over. Compared it with mine. Can
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-23 by Sean
Texas Instruments. --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > What manufacturer were the chips? > > Ken > > >One thing of interest, I bought the LM3900s and they say LM3900 on the > chips but the package they came in said LM339. But I just figured they used > contai
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-23 by cg_synth
What manufacturer were the chips? Ken >One thing of interest, I bought the LM3900s and they say LM3900 on the chips but the package they came in said LM339. But I just figured they used containers they had on hand. I'll pick up some other LM3900s and give it a shot and I'll do a
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-23 by Sean
One thing of interest, I bought the LM3900s and they say LM3900 on the chips but the package they came in said LM339. But I just figured they used containers they had on hand. I'll pick up some other LM3900s and give it a shot and I'll do a little research on PN4250s I used. Than
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-23 by cg_synth
Looked it all over. Compared it with mine. Can't see anything obviously amiss. My thoughts: 1) check that the PN4250 are in the correct way. I can see you have them according to the overlay, but perhaps the transistors are reversed int he package. (all the same, I don't see how t
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-22 by Sean
Maybe, slightly better pic of back... https://sphotos-a.xx.fbcdn.net/hphotos-ash4/317422_10151631973766807_1744874777_n.jpg --- In cgs_synth@yahoogroups.com , "Sean" wrote: > > Hopefully this works? btw, I also had to use two larger 2.2M resistors in the build. One is pulled in t
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-22 by Sean
Hopefully this works? btw, I also had to use two larger 2.2M resistors in the build. One is pulled in the pic (for troubleshooting) Thanks -Sean http://groups.yahoo.com/group/cgs_synth/photos/album/1219515935/pic/list?mode=tn&order=ordinal&start=1&dir=asc --- In cgs_synth@yahoogr
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-22 by cg_synth
Take some high res photos - IN FOCUS - of both sides so we can look at it. Ken >Yup, only connected to 1n cap and not using pad T. No shorting when chip is out. Burn mark on pin 9 appeared from first LM3900 going poof. I've checked solder joints and traces many times over. I can'
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-22 by Sean
Yup, only connected to 1n cap and not using pad T. No shorting when chip is out. Burn mark on pin 9 appeared from first LM3900 going poof. I've checked solder joints and traces many times over. I can't help but think it's something else.. maybe a weird transistor or cap or mislab
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-22 by cg_synth
pin 9 should be connected only to a 1n capacitor. Pad T is not used. There should be no current flow through it. Find out what pin 9 of the socket is short circuited to. --- In cgs_synth@yahoogroups.com , "Sean" wrote: > > Been testing my voltages (with blown LM3900s removed) btw
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-21 by cg_synth
--- In cgs_synth@yahoogroups.com , "Sean" wrote: > > Finished building an SSG last night and am having similar issues. Keep popping LM3900s. They go fast and extremely hot! Checked traces (I'll check again) but haven't troubleshooted extensively yet. btw, I used J201 (not J201A)
Re: SSG troubleshoot and weird lm3900 behavior
2013-04-21 by Sean
Been testing my voltages (with blown LM3900s removed) btw, pin 9 is getting burns on IC socket. 1) +7.50 2) 0 3) -7.41 4) -14.01 5) +3.59 6) -0.06 7) -14.87 8) -0.01 9) 0 10) -0.10 11) -0.06 12) +8.06 13) -3.34 (stepped), +5.82 (smooth) 14) +14.86 Strange voltages I'm getting. -S