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2009-09-27 by misterb74
Hi there, I'm in the process of putting together digital noise and tube vca modules, but I'm fairly new to this hobby and am a bit confused about the appropriate capacitors to use. I'd appreciate some advice. When would a ceramic capacitor and when would a metalized polyester cap
2009-09-24 by colorful.bottle
Hello All, Having a bit of trouble...my End Out seems to be putting out a constant ~8V output. It follows the input inversely. When I gate the input with 5V it will go to 0V according to the Rise pot and return to ~8V according to the Fall pot. I am breadboarding the circuit and
2009-09-08 by r_j_d_2.phila
hi folks, im hoping someone can help me finish calibrating these modules. i have 1 fully built and wired VCO. i was able to do the 1st step of setup, setting V at pin 7 of said IC to 0 volts. when i try to SCALE to 1V/oct, the "span" trimmer just affects the overall pitch, but th
2009-09-01 by gddfp
Thanks, Ove ! After some more thinking, I decided to stick with the separate inputs, and use the leftover space for an additional boolean logic mini-module (some XOR/XNOR). Appreciate your input, though ! _g --- In cgs_synth@yahoogroups.com , Ove Ridé wrote: > > Sorry, that mail
2009-08-31 by Ove Ridé
Sorry, that mail wasn't finished... I was going to search for teh CGS26 schematic, but pressed send instead of save in GMail. http://www.cgs.synth.net/modules/pic/schem_cgs26_analogic.gif If this schematic is still valid you should be able to connect the input with no problem. Th
2009-08-31 by Ove Ridé
You could try using the same Use a simple opamp buffer for : http://www.eecs.tufts.edu/~dsculley/RCX/buffer.JPG 2009/8/31 gddfp guy@... >: > > > I wish to set up this module's panel in a manner as practical as possible > (for me). > > So I'd like to have some sort of "combined in
2009-08-31 by gddfp
I wish to set up this module's panel in a manner as practical as possible (for me). So I'd like to have some sort of "combined inputs", having these going to both the AND and OR sections at the same time. I understand that this isn't directly possible due to interference between
2009-08-28 by sasami@hotkey.net.au
>The diagram for the CGS75 VCS is only a cropped image of the pcb. Standard text below mentions the pots being viewed from rear etc. That is the theory! >Are you going to post a wiring diagram there? In the meantime fair assumption from the schematic gif : > >POUT connects to IN?
2009-08-28 by x24holsey
Ken, The diagram for the CGS75 VCS is only a cropped image of the pcb. Standard text below mentions the pots being viewed from rear etc. Are you going to post a wiring diagram there? In the meantime fair assumption from the schematic gif : POUT connects to IN? Curious but, not su
2009-08-07 by dematteoanthony
So,just finished the asr but am getting no output on 1.3&2 are working fine.So far i've done some obvious tests, checked wiring on jack, check continuity from jack and through the board. Hopefully someone can be kind enough to clue me in on some more troubleshooting.My knowledge
2009-07-25 by achtung_999
Hey list, I finally finished my Ring Modulator/Single Sideband Modulator project. Read & Hear all about it in this post on my site: http://ernstvanderloo.com/?p=24 Oh please be careful the link colour is not so clear on my site. The post is full of links just hover over... Have t
2009-07-23 by sasami@hotkey.net.au
What you have done is right. You have balanced the coils around the diode ring, which is what you want to do. >Will it matter if I put the primary side one way or the other? >Since I got transformers that were center tapped on both sides, I just cut away the middle leg on the pri
2009-07-23 by Jon
Will it matter if I put the primary side one way or the other? Since I got transformers that were center tapped on both sides, I just cut away the middle leg on the primary side! And put them in so that the primary side faces outwards on both transformers - like this - http://www
2009-07-16 by jesse.mejia@rocketmail.com
I'll be in for 4! --- In cgs_synth@yahoogroups.com , "intellijel" wrote: > > I will definitely be buying 2-4 of the euro sized pcbs when they are out! > > > > --- In cgs_synth@yahoogroups.com , sasami@ wrote: > > > > > > >i hope you get enough this time that they don't sell out q
2009-07-15 by intellijel
I will definitely be buying 2-4 of the euro sized pcbs when they are out! --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > > >i hope you get enough this time that they don't sell out quite so quick ;) > > I ordered twice as many as I expected I would need. It was just tha
2009-07-04 by sasami@hotkey.net.au
>i hope you get enough this time that they don't sell out quite so quick ;) I ordered twice as many as I expected I would need. It was just that instead of ordering two each, every one seemed to want four! There is still a component value I need to check before I run them again,
2009-07-04 by T3h caTmaN
definitely great news Ken!! i'll be looking to order 2 & a few other boards. i hope you get enough this time that they don't sell out quite so quick ;) d. To: cgs_synth@yahoogroups.com From: sasami@... Date: Sat, 4 Jul 2009 16:05:04 +1000 Subject: Re: [cgs_synth] Re: new Serge VS
2009-07-04 by sasami@hotkey.net.au
More boards will probably be about a month away. I'm still preparing the order. Ken >Great news - where's the best place to watch for announcements re: more pcbs? :) > >Thanks for such an amazing service to us all! > >-Jesse > >--- In cgs_synth@yahoogroups.com , "Ken Stone" wrote
2009-07-04 by jesse.mejia@rocketmail.com
Great news - where's the best place to watch for announcements re: more pcbs? :) Thanks for such an amazing service to us all! -Jesse --- In cgs_synth@yahoogroups.com , "Ken Stone" wrote: > > --- In cgs_synth@yahoogroups.com , "jesse.mejia@" wrote: > > > > hxxp://www.cgs.synth.ne
2009-07-02 by sasami@hotkey.net.au
Schematic has been corrected. Thank you for pointing out the error. Ken >I just have built one half of the dual CMOS VCF and facing an unexpected issue. 3 of the 4 OTAs are exactly powered like the 4069 chip! > >There are -5V at pin 4 of all 4 OTAs and pin 7 of 3 OTAs is connecte
2009-07-02 by sasami@hotkey.net.au
All OTA pin 4 and both 4069 pin 7s are connected to -5 Volts on the PCB. That is correct. If any are reading as 0V, you have left out a link, or you have a PCB with an etch fault (very uncommon). Ken >I just have built one half of the dual CMOS VCF and facing an unexpected issue.
2009-06-30 by ilanode
I just have built one half of the dual CMOS VCF and facing an unexpected issue. 3 of the 4 OTAs are exactly powered like the 4069 chip! There are -5V at pin 4 of all 4 OTAs and pin 7 of 3 OTAs is connected to 0V! Only pin 7 of the 2nd OTA from the right (pcb in front of me and re
2009-06-28 by Dave Leith
I would highly recommend the product you are looking at. It can also be found under a number of different manufacturers names - Connor, Power One, etc. They work great and from what I understand they are what can be found "under the hood" of a few modular synthesizers companies.
2009-06-28 by zombie_tron
as this is my first post i want say hi to all and thanks for existing. im pretty new to the modular thing, but am getting my soldering skills together while restoring some older modules and putting a system together with modules from various companies. could anyone suggest a boar
2009-06-27 by Richard Brewster
Hello and welcome to synth DIY! There's no problem ordering from Elby Designs or from Ken Stone. It helps if you can use PayPal. I buy a lot of DIY stuff with PayPal. Yes, that power supply will work fine. It can be modified to put out +/-12V or +/-15V. Most DIY synths use +/-15V
2009-06-27 by acidblue@ymail.com
First of all, Hi There ! Im new to this group and to CGS Synths, all syths actually. I have a few basic questions about the psycho LFO. First is there a North American dealer that sell component kits? I found elby -designs web site but it's in Austrailia,(http://www.elby-designs.
2009-06-25 by Jon
I'm sorry I wasn't clear - I meant the Sub Oscillator circuit on the VCO (CGS48). Thanks! //Jon --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > The capacitors were 330pF on the original version, and are 1n5 on the later > version, and yes it is a narrow spike. These days
2009-06-25 by sasami@hotkey.net.au
Two center tapped windings are fine. You simply don't use the center tap on one side. Ken >I forget: was there a way to use transformers w/ two center-tapped windings? I can no longer find them without! > >Thanks! >Scott >--- In cgs_synth@yahoogroups.com , sasami@... wrote: >> >>
2009-06-25 by Scott Deyo
I forget: was there a way to use transformers w/ two center-tapped windings? I can no longer find them without! Thanks! Scott --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > 10k is fine. Just make sure it has a center tap on at least one of the windings. > > Ken > > >Hi,
2009-06-25 by sasami@hotkey.net.au
The capacitors were 330pF on the original version, and are 1n5 on the later version, and yes it is a narrow spike. These days I don't rout the signal to the panel myself. Have a look at the second panel layout on my page. Ken >Hi, > >Mine is just a short spike. Giving a very thin
2009-06-24 by Jon
Hi, Mine is just a short spike. Giving a very thin sound. Should it be like that? The 220pF between leg 1 and 5 sets the width? Cheers, //Jon
2009-06-23 by steve McManaman
OK, I know what the bead is now, I've seen them and never knew what they were. Well, I guess I'll go ahead and take my best guess on these mods. Is it possible that track problem was fixed already on the PC board? There really is nothing connecting pin5 to any capacitor. also, I'
2009-06-22 by sasami@hotkey.net.au
A bead is a ferrite bead on a piece of wire. If you can find one, just use a wire link. (yes, a piece of wire from an old resistor leg for example). Ken >A couple of clues: > >1) You only need to do the modifications specific to your version of the > >board. Ver 0.2 modifications
2009-06-22 by steve McManaman
A couple of clues: 1) You only need to do the modifications specific to your version of the board. Ver 0.2 modifications do not need doing. 2) Decoupling capacitors are to keep the power rails stable. These parts are already on the PCB. You do not need to do anything extra.-Great
2009-06-22 by Jon
Thanks! //Jon --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > 10k is fine. Just make sure it has a center tap on at least one of the windings. > > Ken > > >Hi, > > > >Anyone in Europe who can recommend a place to get the transformers for the > CGS67 Active Real Ring Modu
2009-06-22 by sasami@hotkey.net.au
A couple of clues: 1) You only need to do the modifications specific to your version of the board. Ver 0.2 modifications do not need doing. 2) Decoupling capacitors are to keep the power rails stable. These parts are already on the PCB. You do not need to do anything extra. I don
2009-06-21 by dhamaryder
Hello, I'm new to this forum. I started building the VCO and I just have a few more little parts to get and solder in. I'm not a super-experienced builder so there's one thing I'm a bit confused and insecure about. In the instructions he gives Modifications to the different versi
2009-06-21 by sasami@hotkey.net.au
10k is fine. Just make sure it has a center tap on at least one of the windings. Ken >Hi, > >Anyone in Europe who can recommend a place to get the transformers for the CGS67 Active Real Ring Modulator? > >I found these at Musikding - http://www.musikding.de/product_info.php/info/
2009-06-21 by Jon
Hi, Anyone in Europe who can recommend a place to get the transformers for the CGS67 Active Real Ring Modulator? I found these at Musikding - http://www.musikding.de/product_info.php/info/p406_1-1-Transformer-TM018.html thinking they could work - it says they should be 3K - 3K or
2009-06-15 by Ken Stone
--- In cgs_synth@yahoogroups.com , "jesse.mejia@..." wrote: > > hxxp://www.cgs.synth.net/modules/cgs75_vcs.html > > I've been looking - nay - wishing that something like this would turn up.. but it seems to good to be true. > > "This page is being uploaded early to give access to
2009-06-15 by jesse.mejia@rocketmail.com
hxxp://www.cgs.synth.net/modules/cgs75_vcs.html I've been looking - nay - wishing that something like this would turn up.. but it seems to good to be true. "This page is being uploaded early to give access to ther BOM for those who wish to buy parts." This implies there has been
2009-06-09 by Craig Lee
So the pots arrived from futurlec today. They are indeed alpha pots 55 cents apiece.
2009-06-05 by Craig Lee
I have lots of Alpha pots in my synth already. I guess I'll see how it goes. I know there can be endless tweeky flame posts about pot quality, but the Alphas I have already seem to be doing fine.
2009-06-05 by drsyncenstein
the futurlec pots are Alpha pots. They have a smooth feel and seem to work fine. Don't know how they hold up in the long term. There are many synth diy-ers that use these, only trouble I've heard about is that some people got center detented pots delivered instead of regular pots
2009-06-04 by synthwick
I'd guess that they'd be fine if you just bought a few and test them. The question is whether they will hold up or not. I used some cheap pots from AllElectronics about 8 years ago, that were about that price. They look exactly like alpha pots, but w/ a slightly different marking
2009-06-04 by T3h caTmaN
hhmmm.... cheap chinese made jobbies?? maybe buy a few & test 'em out. d. To: cgs_synth@yahoogroups.com From: crash49@... Date: Thu, 4 Jun 2009 15:00:05 +0000 Subject: [cgs_synth] Programmer/Sequencer, question about pots Has anyone used these pots from Futurelec: http://www.futu
2009-06-04 by synthwick
I've got a quick, semi-related question. I've been recording some things lately, and pick up a scratchy pot (sounds like wind blowing on a mic.). I don't hear it when I listen through my speakers. I've tried to hunt it down and can't find it! (big difference, though. after the mi
2009-06-04 by Craig Lee
Has anyone used these pots from Futurelec: http://www.futurlec.com/PotRot.shtml I'm looking for some pots for the Programmer/Sequencer. These look good but at 55 cents I'm a little worried about quality.
2009-06-02 by sasami@hotkey.net.au
The DC mixer will do the job. It is not limited to any particular voltage range. The DC specification is because it can be used to add DC voltages (both positive and negative). It is a DC coupled mixer. Ken _______________________________________________________________________ K
2009-06-02 by david rickert
Ken, I want to mix three audio signal (from VCOs) non-inverted to a single output. What would be the best (simplest) board to do this with? I keep getting confused with the terminology. I looked at the DC mixer but I suspect that this just mixes the part of the signal that is 0v