utility LFO question
2007-04-19 by celebutantemusic
Sorry for dumb electronics newbie question, but what exactly does the "vari" output do? Mitchell
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Re: wavetracker defined
2007-04-19 by Ben Stuyts
Hi Scott, On 19 Apr 2007, at 12:19, Scott Deyo wrote: > The 4U Event Seq/ Wavetracker is Ken's Sequential Switch w/ my > NanoGlide. I can't find any info on the NanoGlide. Do you have more info? (BTW, I just received two Oakley panels from Scott. They look great!) Ben
wavetracker defined
2007-04-19 by Scott Deyo
Sorry, I got a bunch of questions like "Where on the CGS site is the Wavetracker?" The 4U Event Seq/ Wavetracker is Ken's Sequential Switch w/ my NanoGlide. I just renamed it, partly to infer two functions -- an 8-channel CV/audio sequenced router at CV-clocked rates, and a wavef
Re: panel graphics in a file format my Mac will read
2007-04-18 by celebutantemusic
Thanks, it'll help. My e-mail is mitchell at celebutantemusic dot com (just being paranoid about e-mail fishing!) I already found all the font and size info on the .com site, so I'm cool there. Since I don't pretend to know my way around silkscreening, I'm probably just going to
Re: panel graphics in a file format my Mac will read
2007-04-18 by Mark
While I want panels in MOTM format, I have similar issue -- I can't seem to find a way to get panels without building a Windows machine. In fact, it seems one can't even get prices from Front Panel Express without using the the Front Panel Designer software. So even if I already
CGS Panels
2007-04-18 by Scott Deyo
Hello group, I have some new CGS panels on my site -- Digital Noise, Slope Generator and 4U Seq Switch (I call it Event Seq/ Wavetracker). That last one uses my NanoGlide PCB also. It has a switch to change caps on the glide, for CV or audio rates. Cheers, Scott Deyo The Bridecha
Re: Grounding issues CGS 48
2007-04-17 by sasami@hotkey.net.au
If they are being connected to a CV input, the top end goes to +15, and the bottom end goes to either ground or -VE depending on the desired range. If you are talking about tuning pots, use -VE. Ken >Cheers. On the panel side of the module, I've intalled all the pots. Do they all
Re: panel graphics in a file format my Mac will read
2007-04-17 by contact@bridechamber.com
I've got a .Com tickmark graphic I can send. Keep reminding me; it's on my work computer :) Are you a member of the Synth Modules group? They are .Com owners in support of other designs in that format. Someone from that list sent it to me. There is a mechanical drawing of the pan
Grounding issues CGS 48
2007-04-17 by Mickey Finn
Cheers. On the panel side of the module, I've intalled all the pots. Do they all share a common ground to the pcb? There are 3 tabs, the wiper is the center, so that will go to the specific output on the PCB, what about the other 2?? Thanks- COleman.
Burst Generator issues
2007-04-17 by megons
My freshly assembled Burst Generator is sending a continuous stream of clock pulses on the pulse out and the Duration out is always high. In other words, the counter doesn't seem to be working. This problem is reminiscent of Richard Brewster's issue that he solved by using a diff
panel graphics in a file format my Mac will read
2007-04-17 by celebutantemusic
Hey all... New to the group, .com owner just getting into making my own modules (CGS kits via Elby Designs). I want to design my own panels; specifically I'm looking for the radial tic markings for a knob, and maybe waveform icons (I could make those though). It seems everyone wh
CGS-44 Echo/Delay project
2007-04-15 by djbrow54
I spent some more time working on my CGS-44 Delay Development board. I had temporarily suspended working on this since my prototype stopped functioning some time ago. I since found a missing ground wire and connecting ground to the comparator makes it work correctly! I've added V
Re: bi-n-tic filter
2007-04-15 by Richard Brewster
I intend to put up a second demo of the Bi-N-Tic used as a filter. I used Q4-Q7, buffered by a CGS-56 board, for the SUB 1-4 outputs. Panel composition is always an exercise in trade-offs. I have plenty of mixer/attenuators, such as the Oakley Multi-mix, which really are useful t
Re: bi-n-tic filter
2007-04-15 by contact@bridechamber.com
That is indeed a nice demo, Richard. Mine should be up on the site this week sometime, I hope. On the VCO mod board, the 560k goes to -V, I think (I'm on my PC at home -- painful and fitful). I ran a drum machine through the Bintic, but could only really get it to do nasty things
Re: bi-n-tic filter
2007-04-15 by Mark
On 4/14/07, Richard Brewster put forth: >As I mentioned last week, I patched up a demo of the Bi-N-Tic Filter to >show how it can work nicely as a VCO. Go here to listen to it. > > http://www.pugix.com/bottom-cabinet-lower.htm#cgsbintic > >bi-n-tic-vcf-vco.mp3 http://www.pugix.co
Re: Bi-N-Tic demo
2007-04-15 by Future Image
Nice demo! It's funny how one module can do so many things! --- In cgs_synth@yahoogroups.com , Richard Brewster wrote: > > As I mentioned last week, I patched up a demo of the Bi-N-Tic Filter to > show how it can work nicely as a VCO. Go here to listen to it. > > http://www.pugix
Re: SuCcess! (Was: bi-n-tic filter...help!)
2007-04-15 by Jason Proctor
LT1013 is another good fast rail-safe opamp. MOTM standard for CV processing etc. hth >LM358 are all over the place with regards to specs. Initially I was using a >very good batch when designing with them. Later I got a poor batch, realised >the problems and phased them out. For
Re: SuCcess! (Was: bi-n-tic filter...help!)
2007-04-15 by sasami@hotkey.net.au
> When I built my Gate Sequencer I had problems using the LM358 as a >comparator. I think the transition time may be too slow. Instead of a >sharp trigger/pulse, there was a ramping up. This caused the CMOS chip >trigger/count to be very jumpy. LM358 are all over the place with r
Bi-N-Tic demo
2007-04-14 by Richard Brewster
As I mentioned last week, I patched up a demo of the Bi-N-Tic Filter to show how it can work nicely as a VCO. Go here to listen to it. http://www.pugix.com/bottom-cabinet-lower.htm#cgsbintic bi-n-tic-vcf-vco.mp3 http://www.pugix.com/music/bi-n-tic-vcf-vco.mp3 > -Richard Brewster
Re: bi-n-tic filter
2007-04-14 by Scott Deyo
Yup. My mistake. inv and non-inv are opposite, but pin numbers are correct. Comparator it is. Scott Deyo The Bridechamber contact@... www.bridechamber.com On Apr 14, 2007, at 2:31 PM, Mark wrote: > > On 4/13/07, Scott Deyo put forth: > > > >Maybe the 358 would be better. I just h
Re: bi-n-tic filter
2007-04-14 by Mark
On 4/13/07, Scott Deyo put forth: > >Maybe the 358 would be better. I just had 072s, and they've worked on >around 10 Bintics I've built. >Follow the Electronotes link on Ken's VCO page to get a full >description. My mod is from there. I think I found the issue here. On the Elect
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-14 by Scott Deyo
> > > I just double checked, and the inverting and no-inverting inputs, and > their corresponding outputs are also the same pins on the TL072 and > LM358. So I'm still confused. Whoops. I changed the pin numbers but not the - and + on the schematic. > > I had thought that linear
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-14 by Mark
On 4/13/07, Scott Deyo put forth: >Oops... I meant the - and + _inputs_, sorry. That is, the inverting and >non-inverting inputs to the opamp. The power supplies are indeed the >same, and although I use 072, the 358 should also work fine there. I just double checked, and the inve
Re: SuCcess! (Was: bi-n-tic filter...help!)
2007-04-14 by Peng
>> Although, afaik, a TL072, unlike >> the LM358, doesn't like going to rails. I'm not sure about positive >> outputs, but the common mode voltage getting too close to the >> negative rail of a TL072 can cause phase inversion and latch up. I >> apologize if I sound overly critica
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-13 by Scott Deyo
> On 4/13/07, contact@... put forth: > > > >I'll clear up the confusion. For the daughter board, the schematic > >is correct. The - and + pins on one op amp are swapped, basically. I > >use a CGS simple mixer PCB, which needs to have those physically > >swapped, as the ground tra
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-13 by Mark
On 4/13/07, contact@... put forth: > >I'll clear up the confusion. For the daughter board, the schematic >is correct. The - and + pins on one op amp are swapped, basically. I >use a CGS simple mixer PCB, which needs to have those physically >swapped, as the ground trace is a bit
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-13 by contact@bridechamber.com
Hello, I'll clear up the confusion. For the daughter board, the schematic is correct. The - and + pins on one op amp are swapped, basically. I use a CGS simple mixer PCB, which needs to have those physically swapped, as the ground trace is a bit too big there to simply cut. You t
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-13 by wasubot
Maybe he is using some of the later batches of MOTM power cables which are connected in random colours on some ends. I assumed the colour codng was correct and fried my .com 107 because of this, fortunately its a pretty bad filter anyway so no loss. Wasubot. On 4/13/07, sasami@..
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-13 by sasami@hotkey.net.au
>>(BEWARE THE 'REVERSE' POWER SUPPLY PIN-OUTS! - I'm supprised I >>didn't fry everything on the board). > >The power supply pins don't follow MOTM format?? I could see how >that could cause a problem. Do you need to make a special cable?? Huh?? Is this on the daughter board? Ken
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-13 by Mark
On 4/12/07, James Elliott put forth: >I ordered the MOTM Bridechamber version from Scott. I had some >difficulties initially with the construction, however once I got >everything figured out it worked fine After looking at the docs, the daughter board for the VCO outputs seems a
Re: Full 19" width panels
2007-04-12 by laxt57@aol.com
Hi I tried making Fracrack modules,that format is just too small for my taste. I have been doing 1u rack modules for my new synth. Plenty of room for big knobs, lots of jacks etc. Also you can buy cheap blank 19 inch rack panels from Bud,Hammond etc for cheap.Drill a few holes, d
Re: Morph-Lag
2007-04-12 by sasami@hotkey.net.au
It is on wise guy synth. http://www.wiseguysynth.com/larry/schematics/Morph-Lag.htm Ken >Was there ever an instruction page available for the Morph-Lag PCB? > >Anyone have a copy? > >Andrew > > > >The CGS Modular Synth home page: http://www.cgs.synth.net/ > >Yahoo! Groups Links >
Re: Full 19" width panels
2007-04-12 by sasami@hotkey.net.au
Yes, and it was a royal pain from the construction/adjustment/repair points of view. It is SO much easier to keep them seperate. I use the Serge format though, allowing 1" width per column. Wooden rails will do for mounting. Ken >Playing with Cary Robert's Serge recently got me t
Morph-Lag
2007-04-12 by Andrew
Was there ever an instruction page available for the Morph-Lag PCB? Anyone have a copy? Andrew
Full 19" width panels
2007-04-12 by Andrew
Playing with Cary Robert's Serge recently got me to thinking about building full size 19" x 5.25" panels with several modules in them (instead of standard FRAC sizes). You would gain an extra 1" of useful vertical space, which adds up pretty quickly. And you wouldn't need a rack/
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-12 by James Elliott
I ordered the MOTM Bridechamber version from Scott. I had some difficulties initially with the construction, however once I got everything figured out it worked fine (BEWARE THE 'REVERSE' POWER SUPPLY PIN-OUTS! - I'm supprised I didn't fry everything on the board). The panel look
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-11 by Scott Deyo
And my Bintic's culprit was pin 1 of the 4024 bent under the socket, which of course I didn't notice before basically destroying the PCB replacing parts -- "It's almost never the part's fault," I think I said... :) Cheers, Scott Deyo The Bridechamber contact@... www.bridechamber.
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-11 by Mark
Speaking of the Bi-N-Tic filter (how do you pronounce that, anyway??), has anyone here ordered the MOTM-format kit from Bridechamber?? If so, how did that go, and what did you think of it?? Thanks :)
Re: bi-n-tic filter...help!
2007-04-08 by Richard Brewster
This module *is* a VCO! The frequency controls control VCO, naturally. If you have a calibrated 1V/octave input, it will track over five or six octaves. As someone else pointed out, once you grok the internal blocks of this module, you'll see that it's a VCO that modulates a very
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-08 by Future Image
You should upload those clips into the files section of this group. They're nice demos! --- In cgs_synth@yahoogroups.com , "vtl5c3" wrote: > > I posted a couple of quick and dirty examples of my Bi-N-Tic module under: > > http://web.pdx.edu/~rfahl/Audio/ > > bi_n_ticked_off.mp3 i
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-07 by angelzero
thanks! that helps me understand a little bit about the bi-n-tic. there is a heavy short reverb on both recordings and i hear some environment noise. did you mic a speaker to record that? --- vtl5c3 romeo.fahl@... > wrote: > I posted a couple of quick and dirty examples of my Bi-
Re: bi-n-tic filter...help!
2007-04-07 by contact@bridechamber.com
The Bintic is a VCF that has its frequency driven by an internal VCO. External CVs control the filter by affecting the VCO's frequency. It's easiest to think of it in three chunks -- the VCF which changes the audio signal input, the VCO which handles the frequency, and the logic
Re: bi-n-tic filter...help!
2007-04-07 by casperelectronics
I just realized I've been using the PN4391 too. But I don't think it should make any difference. I'm still confused.... Is this module supposed to function as a VCF> and a VCF? Is the VCO only possible with added circuitry? I'm confused because from Ken Stone's web site it sounds
Re: Success! (Was: bi-n-tic filter...help!)
2007-04-07 by vtl5c3
I posted a couple of quick and dirty examples of my Bi-N-Tic module under: http://web.pdx.edu/~rfahl/Audio/ bi_n_ticked_off.mp3 is a simple sequenced ditty, square wave of an Electronotes Option 3 VCO into the BNT's audio input, another analog sequencer driving one CV input of th
Success! (Was: bi-n-tic filter...help!)
2007-04-07 by vtl5c3
Thanks to the recent thread I decided to revisit my non-working Bi-N-Tic filter. I'd used a BF245A or B for the VCO FET. Not a good substitute - don't bother trying it. I found a PN4091 in my stash, soldered it in and the VCO started working right away. The next problem was the d
Re: Another question aboput the tube vca
2007-04-06 by kidkrazy58
Well i guess i just assumed it wasnt just two modulation sources mixed togethor. i just figured it might caused some weird effect in the modulation of it you couldnt get by just feeding in two mixed sources. --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > I wouldn't expe
Re: bi-n-tic filter...help!
2007-04-05 by Scott Deyo
I've been using the PN4391, not 2N4391. Sorry. Same pinout as the FET on the PCB. Didn't get to play w/ it last night... Scott Deyo The Bridechamber contact@... www.bridechamber.com On Apr 3, 2007, at 3:19 PM, casperelectronics wrote: > Hey scott, > Here are all of the part subst
Re: Another question aboput the tube vca
2007-04-05 by sasami@hotkey.net.au
I wouldn't expect any real difference to mixing two sources and feeding it into the usual modulation input. 6AU6 btw. Ken >It says that the ef86's suppressor grid is not internally connected to >its cathode. So im trying to find other pentodes like that. is maybe a >6hz6 or a 12g
Another question aboput the tube vca
2007-04-05 by kidkrazy58
It says that the ef86's suppressor grid is not internally connected to its cathode. So im trying to find other pentodes like that. is maybe a 6hz6 or a 12gnz like that. i wanna see what it sounds like with a second modulation source. Can some one maybe explain the extra effect th
Re: bi-n-tic filter...help!
2007-04-04 by sasami@hotkey.net.au
The 2n4391, 2N4091 etc. in metal cans MUST be put in backwards with respect to the "D" shape on the overlay. Perhaps that is the problem? KEn >Take an oscilloscope probe or digital multimeter, and touch the output >pin of the CA3140, to see whether you see the roughly 5 volt sawt