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2003-04-02 by vtl5c3
Hello, I'd like to add LEDs to the Pulse Divider outputs of the CGS36 module. Looking at the diagrams for the Boolean modules, it appears that I can just strap an LED betweend the buffer transistor's output and the resister following it. Since the divider's buffers are NPN instea
2003-03-27 by sasami@hotkey.net.au
Re the blunder on the Infinite Melody boards with respect to the LED driving transistor: There is no need to correct the boards despite this error, it will function quite adequately as is. The only real danger would be zenering of the base-emitter junction of the transistor, thou
2003-03-27 by sasami@hotkey.net.au
Apparently I've made a blunder on the Infinite melody boards (both original and REV1). The base of the BC547 should be connected to pin 15 if IC2 (4015) and not pin 1 of IC1 (LM358). The schematic is correct. The error is on the PCB. Ken __________________________________________
2003-03-22 by sasami@hotkey.net.au
Doh! got the subject wrong. The VCO is still awaiting testing, but does exist. Ken _______________________________________________________________________ Ken Stone sasami@... Modular Synth PCBs for sale http://www.blaze.net.au/~sasami/synth/ > Australian Miniature Horses & Ponie
2003-03-22 by sasami@hotkey.net.au
I have uploaded details of the new version of the Voltage Controlled Divider to my site, and PCBs for that are currently available. On Tuesday, I should also have a restock of some of the boards that are out of stock. Ken __________________________________________________________
2003-03-21 by sasami@hotkey.net.au
I've updated the Modules menu to be less confusing. I've also added some knobs to my PCBs for sale page. Have fun Ken _______________________________________________________________________ Ken Stone sasami@... Modular Synth PCBs for sale http://www.blaze.net.au/~sasami/synth/ >
2003-03-20 by sasami@hotkey.net.au
>Would it also be a good idea to decrease the 100K, 150K and 220K Take them down to 18k like the other speed controlled channel. >Something I noticed on the PCB are three two-hole connector points. >One set is above the 150K resistor, the second is to the right of the >220K resis
2003-03-20 by Michael
Hi Group, Just built my first Psycho LFO. Considering I could write what I know about electronics on the head of a pin I was pleased as punch when it worked first time I plugged it in. I had the pots wired backwards but that was an easy fix. I can see this being a fun little modu
2003-03-14 by vtl5c3
Just noticed that the LF411 like a good candidate too. Definitely has lower input offset than the LF356. --- In cgs_synth@yahoogroups.com , sasami@h... wrote: > > The offset would probably be insignificant against the droop anyway. Serge > used 3140s in his ASR. > > Ken > > >Has
2003-03-09 by sasami@hotkey.net.au
The offset would probably be insignificant against the droop anyway. Serge used 3140s in his ASR. Ken >Has anyone tried buffers other than LF356s for the CGS ASR? In >the documentation, Ken mentions that CA3140s would work, >though there might be offset errors. How noticable woul
2003-03-09 by vtl5c3
Has anyone tried buffers other than LF356s for the CGS ASR? In the documentation, Ken mentions that CA3140s would work, though there might be offset errors. How noticable would such errors be?
2003-03-03 by knarleybass <knarleybass@yahoo.com>
Glad you like the site Scott. When I started out I had the hardest time ordering the right parts. Hopefully it will help others to get the right parts and not a bucket full of suface mout compnents like I have... Howard --- In cgs_synth@yahoogroups.com , "Scott Stites" wrote: > G
2003-03-01 by John Loffink
Wavemakers did not have a matrix mixer per se, but the Wavemaker 4 Integrated synthesizer had multiple mixing modules that allowed a similar function in combination with the Integrated Processing System which contained a LPF, HPF, Ring Modulator, Phase Shifter and dynamic shaper
2003-03-01 by Scott Stites
Great page, Howard! I remember a while back you posted some links to some music that you made using the Synthacon filter - I really liked those examples - it made me want to try that filter right away. Best Regards, Scott ----- Original Message ----- From: knarleybass@... > To: c
2003-03-01 by John Loffink
Thanks for the compliment. One additional comment, the ring modulator feedback patch validates the usefulness of analog synthesis. Try patching it on any soft synth - it WILL NOT WORK! The initial output of the filters is zero. This is multiplied against the X ring modulator inpu
2003-03-01 by Scott Stites
Total agreement here! I'm on dial-up, so I haven't perused all the docs yet. Was there a matrix type mixer on these synths? Best Regards, Scott ----- Original Message ----- From: groovyshaman@... > To: cgs_synth@yahoogroups.com >; John Loffink jloffink@... > Sent: Saturday, March
2003-03-01 by groovyshaman@snet.net
This is a great site John. Clearly, a lot of work has gone into it. Cool mixer tips, too! George ----- Original Message ----- From: John Loffink jloffink@... > To: cgs_synth@yahoogroups.com > Sent: Saturday, March 01, 2003 3:09 PM Subject: RE: [cgs_synth] Wave Multiplier/Grinder
2003-03-01 by knarleybass <knarleybass@yahoo.com>
I can't agree more, the Wave Multiplier is by far one of the coolest modules out there. I can't wait for Ken to do another run of these boards so I can build up another . I made a page dedicated to the Wave Multiplier, hopefully it might help others with making theirs... http://w
2003-03-01 by John Loffink
A matrix mixer is indispensable when doing complex feedback loops. For example, take a sound through a series of filters, LPF, HPF, Phase Shifter. Take each output to the matrix mixer. One mix goes back to the input, one is the output mix. For added complexity, just take each inp
2003-03-01 by Scott Stites
Hi Ken, > Another little treat I made up was a little sawtooth pitch shifter. Feed it > two different frequencies, and get the sum of them out. 2hz + 200hz = 202hz. > All in a TL074! That sounds really interesting! I'm just amazed at your output. For example, the idea of that mat
2003-03-01 by knarleybass <knarleybass@yahoo.com>
I can't agree more, the Wave Multiplier is by far one of the coolest modules out there. I can't wait for Ken to do another run of these boards so I can build up another . I made a page dedicated to the Wave Multiplier, hopefully it might help others with making theirs... http://w
2003-03-01 by sasami@hotkey.net.au
Cool :) I've been mangling sawtooths with it of late. Another little treat I made up was a little sawtooth pitch shifter. Feed it two different frequencies, and get the sum of them out. 2hz + 200hz = 202hz. All in a TL074! Ken >Normally, I like to make more ethereal sounds with t
2003-03-01 by itsatwistah <scottnoanh@peoplepc.com>
I posted a sound file in the files section called coyote4.mp3. It's an example of Ken's Wave Multiplier mangling a triangle wave from a single VCO. The triangle wave is first applied to the grinder section, then patched back into the triangle input. It's then patched from the fol
2003-02-27 by sasami@hotkey.net.au
> I just took a look at your Matrix mixer and there is an error in the >schematic. The bipolar/Unipolar switch/link is connected wrong. I'm glad to see someone is awake, even if it isn't me. Ken (who seems to be sleep working) _____________________________________________________
2003-02-26 by Yves Usson
Hi again Forget about my previous message ! I have just checked the Matrix mixer page and Ken did already correct the schematic ! Well done Ken!
2003-02-26 by Yves Usson
Hi It seems also that there is a mistake for the buffer stage on the schemo we have a nice schmidt trigger instead of a voltage follower. When looking the buffer PCB one can see that these are voltage follower therefore the schematic is wrong but the PCB is right ! Keep up the go
2003-02-26 by phix_it <phix_it@yahoo.com>
Hello Ken.......and all. I just took a look at your Matrix mixer and there is an error in the schematic. The bipolar/Unipolar switch/link is connected wrong. As shown, when the switch is in the Unipolar position Pin 2 of the output op-amp is shorted to ground and you'd get no out
2003-02-25 by sasami@hotkey.net.au
I've just uploaded details of the matrix mixer to the CGS web site http://www.cgs.synth.net/ Both the boards and the pots are available directly from me. Some of the out of stock boards have been replenished. More stock is due in a couple of weeks. Ken ___________________________
2003-02-17 by sasami@hotkey.net.au
Just remember that Motorola CMOS chips are all "14" numbers. that is, a 4024 from Motorola is a MC14024. An MC4024 does exist, but is a TTL device of an entirely different function. Ken _______________________________________________________________________ Ken Stone sasami@... M
2003-02-15 by Jeffrey Pontius
> It is a addition/subtraction matrix. Feed it two CVs, and you get a handful > of CVs out. The top = A+B, the middle = A, and the bottom = A-B. Inbetween > are numerous divisions. So basically all output CVs track the A input, while > the B input controls their spread on either
2003-02-15 by John Loffink
That's great! We must me psychic, because I was thinking of a DIY module along the same lines, though as a CV generator rather than a processor. John Loffink jloffink@... > > >So Ken, what's the CV Cluster PCB all about? > > It is a addition/subtraction matrix. Feed it two CVs, a
2003-02-15 by David Anderson
Hi folks, Moderately on topic considering the quantity of CGS I've got. I'm selling my entire modular; I just don't have the time to build it anymore and I'm migrating to software synths. It's up on eBay b/c I don't want to sell it piecemeal and it's easier to sell thru eBay than
2003-02-15 by sasami@hotkey.net.au
>So Ken, what's the CV Cluster PCB all about? It is a addition/subtraction matrix. Feed it two CVs, and you get a handful of CVs out. The top = A+B, the middle = A, and the bottom = A-B. Inbetween are numerous divisions. So basically all output CVs track the A input, while the B
2003-02-15 by John Loffink
So Ken, what's the CV Cluster PCB all about? John Loffink jloffink@...
2003-01-30 by Jeffrey Pontius
Since I've recently had a number of suggestions, I think I should let those interested know that I found the problem, and (rather embarrassingly) it was a relatively simple (simple, I suppose, since I now know what it was) mistake. > > If you're still no closer to the answer afte
2003-01-29 by Scott Stites
Excellent suggestions, all. If I understand the original post correctly, you are also in the fortunate position of having one working board. If you're still no closer to the answer after trying John's suggestions, you could try a side-by-side comparison of the two boards. You cou
2003-01-29 by John Loffink
Suggestions: 1) Look for open traces or cold solder joints (hazy looking solder). 2) Check power and ground going to all 4 chips with PCB powered. Also verify 9 volts from the 7809. 3) Check the IC socket connections with the ICs inserted and PCB unpowered. Do the IC pins really
2003-01-28 by knarleybass <knarleybass@yahoo.com>
What can I say... it's amazing sounding, you can't go wrong with this filter... here are some examples, they are all in the TB-303 style.. www.bobknarley.com/Monday/11.mp3 www.bobknarley.com/Monday/07.mp3 enjoy Howard -- In cgs_synth@yahoogroups.com , "j_inform3r " wrote: > Can s
2003-01-28 by knarleybass <knarleybass@yahoo.com>
What can I say... it's amazing sounding, you can't go wrong with this filter... here are some examples, they are all in the TB-303 style.. www.bobknarley.com/Monday/11.mp3 www.bobknarley.com/Monday/07.mp3 enjoy Howard -- In cgs_synth@yahoogroups.com , "j_inform3r " wrote: > Can s
2003-01-28 by j_inform3r <inform3r@optonline.net>
Can someone who built the Synthacon VCF post some soundbites of it? I'm really curious. Thanks, John
2003-01-27 by Jeffrey Pontius
Well, today doesn't seem to be my day for building modules. After building over 20 kits, which have all worked right off or second off (after finding an obvious mistake or some kind assistance guiding me in the correct direction), I'm completely baffled by 2 that don't work. Here
2003-01-23 by sasami@hotkey.net.au
>I have not been able to find the LM3080 for the Wave Multiplier here. Do you think a CA3080 would do the job? As you have already been answered, yes, it's the same device. >A different question. To what extent do you think using 22 ohms resistors in the place of the ferrite bead
2003-01-23 by Luís Marka
----- Original Message ----- From: mdottori2002@... > To: cgs_synth@yahoogroups.com > Sent: Wednesday, January 22, 2003 8:29 PM Subject: [cgs_synth] Wave multiplier > Hi Ken, > > I have not been able to find the LM3080 for the Wave Multiplier here. Do you think a CA3080 would do
2003-01-22 by mdottori2002 <mdottori2002@yahoo.com>
Hi Ken, I have not been able to find the LM3080 for the Wave Multiplier here. Do you think a CA3080 would do the job? A different question. To what extent do you think using 22 ohms resistors in the place of the ferrite beads (which I would have to buy from abroad I think! The sm
2003-01-14 by sasami@hotkey.net.au
The signals are available from the R and L pads on the PCB. Add emitter followers to buffer them as per the burst generator etc. Or maybe a gate to trigger converter would do the trick. Ken >Hi Ken and all. > >I'd like to use the V8 as a trigger generator (too). I mean to have >a
2003-01-14 by sasami@hotkey.net.au
>How can I trim the gain of the two transistors, so the CV goes from 0 to 10V? I >don´t know how to calculate the resistors... Easy. Use a bigger value resistor for the 220k in line with the CV input. Ken _______________________________________________________________________ Ken
2003-01-14 by fdisynth <fdi@ran.es>
Hi Ken and all. I'd like to use the V8 as a trigger generator (too). I mean to have available a sort of trigger output, it's "rhythmic behaviour" May be one could use a signal-to-trigger converter to achieve it, but a dedicated "rhythm output" would be a great option. So we can h
2003-01-13 by Luís Marka
OK, found the bandit. It was a bad 2N2222 in the output stage. Now: Thought the frequency was not going all the way thru the audio spectrum, so I replaced the two 2N2222 by two 2N3904s. Now it goes way BEYOND the audio spectrum, reaching supersonic frequencies with a CV of about
2003-01-13 by Luís Marka
Hi all, I am trying to build the Synthacon VCF, it really looks like a great filter. I etched a PCB, built it with all the corrections (electrolitics in the right polarity, 1k resistor in resonance pot instead of 10k, etc, etc, etc). But... I am getting a HUGE thermal noise, reso
2003-01-09 by knarleybass <knarleybass@yahoo.com>
I used a MKT cap for it, hopefully it will be just fine. here is a parts list with Mouser part #'s http://www.bobknarley.com/synth/cgsasrparts.html --- In cgs_synth@yahoogroups.com , "drg3orge " wrote: > h3y all, > any suggestions for the ASR CX caps. the smallest lead spacin' i