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2005-10-05 by Dave Kendall
Hi. FWIW, I got exactly the same symptoms with an EFM VCF6C. When feeding a K2000 signal into it, it worked fine, but an EFM VCO3D higher (pk to pk) produced the same effect. The VCF6C, like the 1E and 2F, also has a LM13600/13700. Both buffers are used in the 6C, and in the outp
2005-10-05 by sasami@hotkey.net.au
>Is it possible that the VCF wants a lot more current than the >TL071 can give? I'd hope not. Input impedances should be 100k or greater if its designed right. Ken >Ken, > Sorry... I forgot to mention that I set it up for 2x gain... not much, but >just enough to bring the SID up
2005-10-04 by Gerald Stevens
Ken, Sorry... I forgot to mention that I set it up for 2x gain... not much, but just enough to bring the SID up to modular specs. The reason that I built it in the first place is that I ran into the same problem with the VCF-2F not having any resonance with the SID output fed in
2005-10-04 by Andrew Sanchez
Hi Gerald, I wonder if the EFM filter input is being overdriven? I have an EFM VCF-1e, and if I feed an Oakley or MOTM osc to it, I get the same symtom as you describe. If I attenuate the oscillator outputs before feeding them into the EFM filter, the resonance works as it should
2005-10-04 by sasami@hotkey.net.au
Something odd is going on. The CGS60 gives a 20x gain, and is very high impedance - around 150k. If you are only getting a fraction of a gain, there is something seriously wrong with what's driving it. Add a CA3140 or maybe a TL071 as a non-inverting voltage follower/buffer to lo
2005-10-04 by Gerald Stevens
Paia has them, cheap - but they're slightly thicker than Blacet panels. -gerald On 10/3/05, mrboningen darkflametwentythree@... > wrote: > > i am looking for 3u blank panels, full width, for an analogue modular > synth project. do you know where i could obtain these? black or whi
2005-10-04 by Gerald Stevens
Question about the cgs60 stomp box adapter and using it before a filter. I built a modular C64 SID synth that is a lovely beast, with CV ins and outs, and I bought a cgs60 to bring its output up to PAIA/Blacet levels. This works fine - a 3 Vp-p is brought up to about 5Vp-p, nice
2005-10-03 by brett x
or again in australia try elgee at this address http://www.elgee.com.au probably cheaper option and they nmake it themselves and so far i've been pretty happy with the quality etc Brett >From: "Crombie, John (Contractor)" john.crombie@... > >Reply-To: cgs_synth@yahoogroups.com >T
2005-10-03 by Crombie, John (Contractor)
An Australian company has blank rack panels and cases relatively cheap, see www.jaycar.com.au and search for rack panels. cheers John Crombie PLC & Control Systems ph direct: 03 9268 3736 ph mob: 0402 007 833 john.crombie@... ________________________________ From: cgs_synth@yahoo
2005-10-03 by mrboningen
i am looking for 3u blank panels, full width, for an analogue modular synth project. do you know where i could obtain these? black or white would be fine, but i guess as close as possible to blacet panels would be best, seeing as most of the rest of my system is blacet. tia, greg
2005-10-03 by Larry Hendry
Now that you have your gringer all figured out, it's time to play with the other parts. One of my favoite Wave multiplier patches is to use 3 sweeping audio signals, 1 each into the fold, offset, and audio inputs. Larry --- Adam Schabtach adam@... > wrote: > Yeah, I don't know wh
2005-10-03 by Richard Brewster
Hmm... Getting out the soldering iron and a 1n cap. -Richard Brewster Adam Schabtach wrote: >Yeah, I don't know what I was thinking when I made that substitution. I was >probably thinking "oh heck, I forgot to order some 5n6 caps!" > >--Adam > > > >>-----Original Message----- >>F
2005-10-03 by Adam Schabtach
Yeah, I don't know what I was thinking when I made that substitution. I was probably thinking "oh heck, I forgot to order some 5n6 caps!" --Adam > -----Original Message----- > From: sasami@... [mailto: sasami@... ] > Sent: Sunday, October 02, 2005 5:33 AM > To: cgs_synth@yahoogro
2005-10-02 by sasami@hotkey.net.au
> Thanks for the response Richard. I had done the chip swapping when >I had this on the breadboard and some 4017 would skip steps and >generally behave erratically. I'll try the TI one, but I'd like to >see if the circuit could be made to depend less on the type of chip >being us
2005-10-02 by sasami@hotkey.net.au
:) It isn't often that an odd value cap like 5n6 or 6n8 is specified. If it is, then you can bet there is a reason! Ken >Thanks for your help, Ken--I appreciate it. The capacitor was the problem. I >foolishly substituted a 4n7 for the 5n6, thinking that it would be close >enough.
2005-10-02 by sasami@hotkey.net.au
Possible solution #2. If there is an LM358 in the input circuit, replace it with a TL072. I'm finding that the LM358 have widely varying specs, and some work, and some cause all sorts of weird grief. Ken >I had a similar problem with the Burst Generator. It was very difficult >to
2005-10-02 by peng3002
Thanks for the response Richard. I had done the chip swapping when I had this on the breadboard and some 4017 would skip steps and generally behave erratically. I'll try the TI one, but I'd like to see if the circuit could be made to depend less on the type of chip being used. ba
2005-10-02 by Adam Schabtach
Thanks for your help, Ken--I appreciate it. The capacitor was the problem. I foolishly substituted a 4n7 for the 5n6, thinking that it would be close enough. My bad! I put a 1n in parallel and the Grinder works much better now. It produces a much wider and more interesting range
2005-10-02 by Richard Brewster
I had a similar problem with the Burst Generator. It was very difficult to track down. The solution was to replace the 4017 with a *Texas Instruments* part. Some 4017 chips can internally retrigger. If you have socketed these, it's an easy thing to try. -Richard Brewster peng3002
2005-10-02 by Jay
fhserge wrote: > As I do not have the time and skills to build any of Ken Stones > obviously highly recommended modules, is there anybody out there who > would like to build them for me (format does not matter)? Try Michael Ford: http://www.metalbox.com/hardware/index.html
2005-10-02 by fhserge
As I do not have the time and skills to build any of Ken Stones obviously highly recommended modules, is there anybody out there who would like to build them for me (format does not matter)? I know that Cynthia Webster is selling some of these modules in Modcan format, are there
2005-10-02 by peng3002
The pulse outputs on my gate sequencer are putting out double triggers. It makes some of my envelopes stutter. Any suggestions on how to allieviate this? Hysteresis on the output op amps? hmm, peng
2005-10-02 by kvltleader
Yes, I would be as well.... ----- Original Message ----- From: brownchonald To: cgs_synth@yahoogroups.com Sent: Saturday, October 01, 2005 7:24 PM Subject: [cgs_synth] Re: Panels and power supplies? I would be very interested. *smiles* --- In cgs_synth@yahoogroups.com , Jay wrote
2005-10-02 by Scott Stites
> I still don't fully understand what I should expect from this module. I > listened to the sample file in the yahoo group archive, and since I don't > know what the original signal was, I can't glean much insight. If you're referring to coyote4.mp3, I couldn't remember the patch
2005-10-01 by brownchonald
I would be very interested. *smiles* --- In cgs_synth@yahoogroups.com , Jay wrote: > Richard Brewster wrote: > > > The cost would depend a lot of the quality of pots, knobs and jacks you > > use. > > Is anyone interested in kits of "board" parts (with Ken's permission, of > cours
2005-10-01 by sasami@hotkey.net.au
It is producing some of the sounds I would expect. At around the 4 second mark it is sounding pretty correct. You will find it is frequency dependent to some extent (a fixed lag versus a varying input frequency) so that may be why you are finding the pots do "the same thing". The
2005-10-01 by sasami@hotkey.net.au
See the small "ringing" at the bottom of the lower "square" wave? You should be seeing that at about 5-10 times the amplitude on both the top and bottom excursions from a squarewave input. You are seeing ringing, but it appears to be happening across the whole signal. Do you have
2005-10-01 by brownchonald
I could try an emulator program. They are just very slow on Macs, and expensive. I would have to download an illegal copy? I don't know how you guys feel about that. Cole --- In cgs_synth@yahoogroups.com , Richard Brewster wrote: > The FPD files are in a proprietary format and do
2005-10-01 by Adam Schabtach
> I'm going to make a couple MOTM module kits first, to get the hang of > it, then I plan on trying to make the CGS Wave Multiplier. I recently build a Wave Multiplier using an FPE panel. There are photos at my website, http://studionebula.com in the Photo Gallery Section, subsec
2005-10-01 by Adam Schabtach
I still don't fully understand what I should expect from this module. I listened to the sample file in the yahoo group archive, and since I don't know what the original signal was, I can't glean much insight. Since you said that an oscilloscope can help choosing an op-amp that do
2005-10-01 by Dave Kendall
>There is a low-resolution way to export FPD files. Print in outline >mode, then scan the print. Then you have a graphic file others can view. Sounds Like a plan. >I'm not currently a Mac user, but what's the problem with using a PC >emulator? I've heard that people run the FPD p
2005-10-01 by Richard Brewster
The FPD files are in a proprietary format and don't export. Makes sense because the free CAD program Front Panel Designer is meant to create panel orders for its vendor. I find the FPD program very easy to use. There is a low-resoloution way to export FPD files. Print in outline
2005-10-01 by Dave Kendall
Hi Cole. >Do you mean .fpd files? I think so, if it's front panel designer. >What can I use on a Macintosh to view these? I'm pretty sure it's a PC only program. Grrrrrrr..... If anyone knows of a way (other than using a PC emulator) to view .fpd files please post. I'm in Mac-lan
2005-10-01 by Bart Provoost
On 10/1/05, Richard Brewster pugix@... > wrote: > > I am eagerly awaiting the next Stooge panel run myself. Larry's panel > graphics links aren't working at the moment but I expect he will be fixing > them up and adding new panel designs before the ordering starts. The images are
2005-10-01 by brownchonald
Do you mean .fpd files? What can I use on a Macintosh to view these? Thanks, Cole --- In cgs_synth@yahoogroups.com , Bart Provoost wrote: > You can also order panels here (just send your pfd designs): > http://monopole.ph.qmul.ac.uk/~thomas/synthdiy/cnc.htm > There are some desig
2005-09-30 by Jay
Richard Brewster wrote: > The cost would depend a lot of the quality of pots, knobs and jacks you > use. Is anyone interested in kits of "board" parts (with Ken's permission, of course)?
2005-09-30 by Richard Brewster
The cost would depend a lot of the quality of pots, knobs and jacks you use. If you use MOTM-quality parts, the panel parts are going to be the biggest cost. I do recommend, as others have said, to make a big parts list and order in quantity. You can buy 200 1% resistors for $4.0
2005-09-30 by Bart Provoost
You can also order panels here (just send your pfd designs): http://monopole.ph.qmul.ac.uk/~thomas/synthdiy/cnc.htm There are some designs on the group's homepage: http://launch.groups.yahoo.com/group/cgs_synth/files/ Bart -- http://filters.muziq.be [Non-text portions of this mes
2005-09-30 by brownchonald
How much would it cost to build all of the CGS modules that stooge Larry makes front panels for (roughly)? I may just order all the parts and all the front panels when the time comes, just for the heck of it. Cole --- In cgs_synth@yahoogroups.com , Andre Majorel wrote: > On 2005-
2005-09-30 by Andre Majorel
On 2005-09-30 21:01 +0100, Dave Kendall wrote: > If you're starting out ordering components, it's worth thinking about > what modules you are planning on building, working out a big parts > list, and then ordering larger amounts to get bulk discounts. (saves > on shipping/deliver
2005-09-30 by brownchonald
Awesome, thank you guys. I'm going to make a couple MOTM module kits first, to get the hang of it, then I plan on trying to make the CGS Wave Multiplier. Getting the panel from a stooge, with a pcb plate, getting components online, and thhen powering it through the MOTM-900. Is i
2005-09-30 by rdrake
Besides the stooge panels (highly recommended) there are a number of panel designs for CGS modules available in the files section of the "ModularSynthPanels" Yahoo group. These designs are in .fpd format, which is used by the free Front Panel Designer program from Front Panel Exp
2005-09-30 by Dave Kendall
Hi Cole. > What is EFM? Electronics for music (EFM) is run by a Houston-based guy - Tom Gamble, who makes and sells PCBs of his own designs. EFM has its own forum for those designs, and several CGS forum people are also in the EFM forum. >I will have a rack and MOTM power supply,
2005-09-30 by jpontmotm
Just some notes (or my $.02, whichever you prefer): Ordering Stooge panels: Stooge Larry will post a message to several listservs (including MOTM) when he is ready to accept orders for Stooge panels. A list of available panels and their displays will be available on his web site.
2005-09-30 by brownchonald
Thank you. What is EFM? I will have a rack and MOTM power supply, but where will I get the cables to connect the power supply to the CGS board/module? Thanks, Cole --- In cgs_synth@yahoogroups.com , Dave Kendall wrote: > Hi Cole. > > > > Is there anywhere, recently, that is selli
2005-09-30 by Dave Kendall
Hi Cole. > > Is there anywhere, recently, that is selling front panels (MOTM or > > Synthesizers.com format) for the CGS? Although I haven't personally ordered any front panels yet, Steve Thomas at http://monopole.ph.qmul.ac.uk/~thomas/synthdiy/cnc.htm > has had very good feedbac
2005-09-30 by brownchonald
Awesome. Thank you. Should I email one of the stooges, asking what i should get to set myself up to make front panels with brackets to hold all the electronics? --- In cgs_synth@yahoogroups.com , mbedtom@a... wrote: > In a message dated 9/29/2005 9:55:17 PM Central Standard Time,
2005-09-30 by mbedtom@aol.com
In a message dated 9/29/2005 9:55:17 PM Central Standard Time, chonald@... writes: > Is there anywhere, recently, that is selling front panels (MOTM or > Synthesizers.com format) for the CGS? > > Would a MOTM-900 power supply run the CGS modules? > > Cole, Start out here: http://
2005-09-30 by brownchonald
Hello, Is there anywhere, recently, that is selling front panels (MOTM or Synthesizers.com format) for the CGS? Would a MOTM-900 power supply run the CGS modules? I'm new... want to start building these. Thanks, Cole
2005-09-25 by sasami@hotkey.net.au
Basically the grinder is exploiting exactly what you DON'T want in a typical servo system (such as the feedback of an op-amp. It causes the op-amp to overcompensate, then overcompensate in the reverse direction etc, effectively causing a high pitch ringing on the output wave. If