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2003-01-09 by sasami@hotkey.net.au
I used MKT, which is not ideal, but works okay. Lower voltage capacitors should have a smaller pin spacing. Rifa, Wima, etc make these. Ken >h3y all, >any suggestions for the ASR CX caps. the smallest lead spacin' i can >find is 10mm which seems rather wide. anythin' bigger than
2003-01-08 by drg3orge <doc@trocarrecords.com>
h3y all, any suggestions for the ASR CX caps. the smallest lead spacin' i can find is 10mm which seems rather wide. anythin' bigger than 47nF seems to jump to 15mm. any help would be duly appreciated... thanks, doc
2003-01-02 by sasami@hotkey.net.au
More resonance should be available by increasing the value of the pot, say to 2k5. This thing goes quite mad when the resonance is taken over the top. Quite cool :) Ken >Well, > I just got my Synthacon VCF up and running and I must say that >I really like it. It has a very unique
2003-01-02 by knarleybass <knarleybass@yahoo.com>
Well, I just got my Synthacon VCF up and running and I must say that I really like it. It has a very unique sound and running different audio sources into the inputs makse for some really intersting sounds. Everyone should have at least one of these filters. My only question woul
2002-12-31 by sasami@hotkey.net.au
I seem to have made an unusual number of blunders on this one :( On the circuit diagram the 10k resistor in series with the 1k resonance pot is in fact 1k. The PCB is correct. The 10uF between the output transistors and the input of the opamp buffer is correct on the circuit diag
2002-12-23 by emmaker <emmaker@yahoo.com>
Looks very interesting. BTW: You have TL074s in the BOM. Not the TL072s in the schematics. Jay --- In cgs_synth@yahoogroups.com , sasami@h... wrote: > I've uploaded what I have done of the Infinite Melody project, if people > want to check it out (under modules on the cgs web pag
2002-12-21 by fdisynth <fdi@ran.es>
Genial! --- In cgs_synth@yahoogroups.com , sasami@h... wrote: > I've uploaded what I have done of the Infinite Melody project, if people > want to check it out (under modules on the cgs web page). > > It's a start. There is a small logic "problem" which I challenge you to > find.
2002-12-21 by sasami@hotkey.net.au
I've uploaded what I have done of the Infinite Melody project, if people want to check it out (under modules on the cgs web page). It's a start. There is a small logic "problem" which I challenge you to find. It does work well as it is, though I am already dreaming up improvement
2002-12-20 by Logan Erickson <circuitbent@yahoo.com>
thanks. i've been meanign to buy those books he has. i'll have to order those next paycheck. _Logan
2002-12-20 by Fahl, Romeo
I remember seeing a circuit in Barry Klein's book. -----Original Message----- From: Logan Erickson circuitbent@... > [mailto: circuitbent@... ] Sent: Friday, December 20, 2002 6:48 AM To: cgs_synth@yahoogroups.com Subject: [cgs_synth] CEM 3328 VCF 4pole LP filter Hello, i haven't
2002-12-20 by Logan Erickson <circuitbent@yahoo.com>
Hello, i haven't posted much on this group. and it might be a little off topic. I was just wondering if anyone has built a filter with the CEM 3328 off of the Ensoniq Mirage. it looks pretty simple to do. i just thought someone would have done it by now. www.synthtech.com/cem/c33
2002-12-20 by John Loffink
I did some in depth testing of noise induced by switching power supplies just a few years ago. You do not want these anywhere near your audio circuits, trust me. It won't damage your circuits, but you will get nasty byproducts and degradation of your audio from the 80-120 KHz swi
2002-12-20 by sasami@hotkey.net.au
> Advise is given at your pages for BurstGen, SuperPsycho and >GateSeq. Any other modules should be includded on the "dirty >PSU" list? (: GatedComp, DigitalNoise, PulseDivider...?) Yes, though the Gated Comp also has an analog section, so it needs a "clean dirty" supply :) Maste
2002-12-19 by fdisynth <fdi@ran.es>
Thank you Ken. Advise is given at your pages for BurstGen, SuperPsycho and GateSeq. Any other modules should be includded on the "dirty PSU" list? (: GatedComp, DigitalNoise, PulseDivider...?) Using low current LEDs for the SuperPsycho would help? or even eliminate the problem? W
2002-12-18 by sasami@hotkey.net.au
>You suggest using a separate PSU for digital modules (burst >gen, gate seq, etc) > >I wonder if a separate ground for all of them coming from the >main PSU is enough to avoid noise on audio and CV circuits. The noise is also put on the power rails by digital modules, so a separa
2002-12-18 by fdisynth <fdi@ran.es>
Hi Ken, You suggest using a separate PSU for digital modules (burst gen, gate seq, etc) I wonder if a separate ground for all of them coming from the main PSU is enough to avoid noise on audio and CV circuits. I wonder also about another solution: a high quality (very well regula
2002-12-06 by sasami@hotkey.net.au
It should not do so. The purpose of using an op amp as a mixer is to isolate the channels through the virtual ground (pin 2 of the LM358s are a virtual ground). Any variation is likely to be caused by a lack of a good ground connection between the bottom of the pots and the 0v li
2002-12-05 by synth_dg
With the CV mega mixer, i've noticed the volume of an input effects the volume of other channels, and also seems to throw off the zero point of the pots. Anyone encountered this? Is this a trait of simple unity gain summing amplifier circuits? (I've yet to build one from scratch)
2002-12-05 by sasami@hotkey.net.au
>I guess mainly i'm wondering if those who are very experienced with >this stuff.. like.Blacet, etc. how did you start out designing your >own. very small and simple i'd imagine. Invariably we start making modifications to other people's designs. As we get more experienced, we tr
2002-12-03 by Logan Erickson
thanks for the link. i'll have to order that. i'm sure it will come in handy. i think i know what i'm going to have to do.. serios studying of all electronics, circuits, etc. then of course, when i build my motm, i'll just analize each module very closely. it will take a lot of w
2002-12-01 by revtor@aol.com
whoops!!! I guess that answers my questions! ~Steve
2002-12-01 by revtor@aol.com
yeah Im gonna second Logans call for info.... Is the electronotes collection a good source for info for people with a foundation in electronics but not knowing the math behind it all? Obviously a good source of circuts to build but is it educational as well? Is it worth getting t
2002-11-30 by John Loffink
Bernie Hutchin's Electronotes is highly recommended. That's where most of today's designers learned their chops, and $265 will buy you a stack of newsletters and handbook that will keep you busy for a lifetime. If you have to start smaller, then get the Musical Engineer's Handboo
2002-11-30 by Logan Erickson
Just wondering if anyone has any suggestions for learning synth design/circuit design. i know synths. i just want to build modulars.. I'm buildign my first modular from kits.. but i would like to design my own. any suggestions for reading? colleges are sort of out of the question
2002-11-29 by sasami@hotkey.net.au
It sure is. >Hi all CGSers. Hi Ken. >I can't find the LM3080 for the WaveMultiplier, it's OK to use a >CA3080 instead? >Thanks. Cheers, >Fernando > > >f >* > > > >See the following URLS for the CGS Modular Synth home page: >Main: http://www.cgs.synth.net/ >Secondary: http://other
2002-11-29 by fdisynth
Hi all CGSers. Hi Ken. I can't find the LM3080 for the WaveMultiplier, it's OK to use a CA3080 instead? Thanks. Cheers, Fernando f *
2002-11-18 by j_inform3r
Hi Cynthia! Thanks for those numbers. Nano's really throw me off as well! :) Those cheat sheets will come in handy. Thanks again, John --- In cgs_synth@y..., Cynthia Webster wrote: > Hi There! > > For the Burstie > > I looked all over for the right .33 mfd box cap > and finally f
2002-11-18 by Cynthia Webster
Hi There! For the Burstie I looked all over for the right .33 mfd box cap and finally found it at http://www.Digi-key.com/ 1 (800) 344-4539 these are the greatest! Not only that, but they're actually marked in nanos! Yay! the .33 Mfd (or 330n) is part number 3016PH-ND I used litt
2002-11-17 by sasami@hotkey.net.au
>Would you provide examples of cgs modules with and without this >'correction', just so that some of us (well, maybe just me) have concrete >examples to refer to. The Tube VCA also has this problem. Add a 1k between the normalized connetion of the CV input and the 15V rail. The o
2002-11-17 by j_inform3r
I just finished soldering everything to the Burst Generator PCB except for the caps. I ordered them but I got the incorrect ones(my fault). Does anyone know the stock numbers for these caps? I'm in America so I typically use Mouser, Allied, etc... I ordered the caps based on some
2002-11-09 by sasami@hotkey.net.au
>[Now: What are those 3 little symbols next to the sample and hold cap's on >the analog shift registor pcb? They look like partially filled >'containers'.] Precisely! It's a "bucket brigade" - basically a symbolic representation of an ASR :) Just me having fun! Ken ______________
2002-11-09 by Jeffrey Pontius
I've learned to appreciate several features that Ken puts into cgs pcbs: (1) Clear labeling of components on the pcb (i.e., not having to associate codes with particular components); (2) Several holes for non-electrolytic cap's so that different physical sizes of cap's fit easily
2002-11-07 by sasami@hotkey.net.au
>Does this mean that all 3 1uF electrolytics that are first encountered >after the LP, HP and BP inputs should be put in 'backwards' on the >pcb, that is, the negative of the electrolytic placed at the + on the >pcb? Correct. (except for the HP input, where a link is installed in
2002-11-07 by sasami@hotkey.net.au
Whoops! - an errant paragraph! Ken >so, >in readin' through the steiner vcf article i see, "The 10k and 22k >resistors in the input and output buffers should be matched 1% >metal film for best results." there are two 10k resistors listed in >the schematic an' only one listed in t
2002-11-07 by drg3orge
so, in readin' through the steiner vcf article i see, "The 10k and 22k resistors in the input and output buffers should be matched 1% metal film for best results." there are two 10k resistors listed in the schematic an' only one listed in the parts list. there are no 22k resistor
2002-11-06 by sasami@hotkey.net.au
Lacking the resistor are the V8 sim, Voltage controlled divider (division input), Digital noise "Speed CV", The Wave folder has them - the R+ pads, though they are not shown on the circuit diagram, because I have not drawn any pots in with that arrangement. I must update that art
2002-11-06 by sasami@hotkey.net.au
Nyle Steiner indicates that the input electros are backwards in my design. I took the polarity from my reference material, but where this design is concerned, Nyle is the expert! Nyle also suggests leaving out the 1uF electro (use a link instead) and pulldown resistor (leave empt
2002-11-06 by fdisynth
Thank you Ken. I can not design, so I hope you post any possible mod and conclusions about VControlling the resonance... :) Meanwhile, we'll wait for the board! f *
2002-11-06 by Jeffrey Pontius
Hi Ken, > My recommendation is that the +15 is fed to the normalized connection on the > socket through an additional 1k resistor, therby limiting the current. Some > of my later designs already have this in place. > Would you provide examples of cgs modules with and without this
2002-11-06 by sasami@hotkey.net.au
A number of my designs use a pot wired as a voltage divider to control speed etc. In most of these cases, the pot is connected to an input socket that is normalized to +15 volts so that without an input, the pot acts as a DC control pot. This may cause problems with any module th
2002-11-06 by sasami@hotkey.net.au
It may work. It looks like they are using the 13700 as a voltage controlled resistor. There are a couple of different versions in the 13700 datasheet. Nyle sketched up an improved resonance control which I will investigate. This one has the resonance pot going to ground, so maybe
2002-11-06 by fdisynth
Hi. I have find a circuit to add a CV controlled resonance for the PAiA FatMan ( http://home1.gte.net/res0658s/FatMan/vc_rez.html ). I wonder if this can be applied to the new CGS filter. I don't know how to adapt it. Any opinion/idea/help? Thanx all. f *
2002-11-04 by Cynthia
Hickory, Dickory, Dock... Two Burst Generators with intertwined clocks! At the count of ten, they both fire again, and the fun and the rhythm never stops! Cynthia
2002-11-04 by sasami@hotkey.net.au
These boards will be back in around 2-3 weeks, though at the rate things are going, they may all be spoken for before they arrive! Ken >Hi Ken, >will you have more of these boards in soon? >They look like fun ;) > >cheers, >Paul > >PS - time to update the weblinks at the bottom o
2002-11-04 by paul kimber
Hi Ken, will you have more of these boards in soon? They look like fun ;) cheers, Paul PS - time to update the weblinks at the bottom of these mails sasami@... said at Ò[cgs_synth] CGS35 Steiner VCF errorÓ. [04/Nov/02Mon 19:42] > CGS35 Steiner VCF error > Please note the capacito
2002-11-04 by sasami@hotkey.net.au
CGS35 Steiner VCF error Please note the capacitors marked on the schematic as 22n should in fact be 2n2. The PCB and parts list are correct. Ken _______________________________________________________________________ Ken Stone sasami@... Modular Synth PCBs for sale http://www.bla
2002-10-28 by sasami@hotkey.net.au
>What's the Infinite Melody module do? It could be summed up as a random or 1/f CV generator. It has SIX parallel shift registers. Consider the Gated comparator (running vertical) - now from each of the first six outputs come six more shift registers (running horizontal). Now all
2002-10-28 by Fahl, Romeo
Ken, What's the Infinite Melody module do? Romeo -----Original Message----- From: sasami@... [mailto: sasami@... ] Sent: Sunday, October 27, 2002 11:14 PM To: cgs_synth@yahoogroups.com Subject: [cgs_synth] pulse divider / boolean logic The construction details for the pulse divid
2002-10-28 by sasami@hotkey.net.au
The construction details for the pulse divider / boolean logic board are now online, for those of you who already have bought PCBs. I have 6 boards left. Have fun. Ken _______________________________________________________________________ Ken Stone sasami@... Modular Synth PCBs
2002-10-27 by sasami@hotkey.net.au
For those of you who don't read the instruction pages propperly, note that a TL071 is required, not a TL072 as shown on the PCB overlay :) Ken _______________________________________________________________________ Ken Stone sasami@... Modular Synth PCBs for sale http://www.blaze