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2009-10-26 by lief codianni
Thanks! ________________________________ From: " sasami@... " sasami@... > To: cgs_synth@yahoogroups.com Sent: Mon, October 26, 2009 5:16:39 AM Subject: Re: [cgs_synth] CGS41 Diatonic Converter 2 questions for now (Daft) >1) Can I replace the 3V9 ZD with 5V1? Possibly, but if you
2009-10-26 by sasami@hotkey.net.au
>1) Can I replace the 3V9 ZD with 5V1? Possibly, but if you overdrive it, I am not sure what will happen. >2) Can I use 22R resistors in place of the beads? Yes. >bonus questions >3) What about 4K 1% instead on 3.9K resistors Yes. >4) What about 100K 5% instead of 1% No. Ken ____
2009-10-26 by lief codianni
Hi Folks, Im putting together this Diatonic Converter now. I know I will have other questions later but for now I have two questions about substutions. 1) Can I replace the 3V9 ZD with 5V1? 2) Can I use 22R resistors in place of the beads? bonus questions 3) What about 4K 1% inst
2009-10-19 by sasami@hotkey.net.au
I'll try that again. Replace the 10n in series with the cycle switch with a 1n, and the lock-up should be avoided. I did the mod to some genuine DUSG with success. > >>And then it stops cycling. >>But that's just like a real DSG. > >Replace the 10. in series with the cycle switch
2009-10-19 by sasami@hotkey.net.au
>And then it stops cycling. >But that's just like a real DSG. Replace the 10. in series with the cycle switch with a 1n, and the lock-up should be avoided. I did the mod to some genuine DUSG with success. Ken >So no worries. > >Cheers, >//Jon > >17 okt 2009 kl. 12.53 skrev Guy: >
2009-10-19 by sasami@hotkey.net.au
replace lm358 with tl072. > I decided to revisit my sequential switch. In order to get it to work I have a choice of mods, I would like to get it going. Is there any new thinking on this pcb ? Which mod will get it going for sure ? > > > >------------------------------------ > >T
2009-10-19 by Jon Nensén
The end out is high as long as the trigger input is low. Rise and fall input CV is center 0, and -1 ccw and +1 cw. So you can invert incomming CV. The exp. cv in does affect the rate of the rise and fall, as it makes it go faster? The cv processor is ment to be for the both input
2009-10-19 by adaaxs
I decided to revisit my sequential switch. In order to get it to work I have a choice of mods, I would like to get it going. Is there any new thinking on this pcb ? Which mod will get it going for sure ?
2009-10-18 by Richard Brewster
I've now seen Scott's panel design, and it's got all the features I put on my panel. I'll be ordering panels from Scott, because I like his designs and they are so much less expensive than Front Panel Express. About the Exponential CV input, I couldn't say if it's the equivalent
2009-10-18 by Guy
Hey Richard, thanks for replying ! The funny thing is, just 5 minutes before I checked in here, I saw Scott's VCS design over at the MSP group... --- In cgs_synth@yahoogroups.com , Richard Brewster wrote: > > I haven't built a CGS 75 yet. I am waiting to see what the Bridechamber
2009-10-17 by Richard Brewster
I haven't built a CGS 75 yet. I am waiting to see what the Bridechamber MOTM format panel looks like first. And I'm waiting for the CGS-75 PCB boards to become available from Ken Stone again. But I can give some answers. The AC output is ground-centered - it has zero bias. The Ri
2009-10-17 by Guy
Started doing the panel for the VCS, and wanted to be sure about some things. Sorry if this has been asked before. - The output signals - is this correct : http://www.guyd2.com/stuff/VCS_signals.gif (not sure about the bias of AC Out) - Are the Rise/Fall CV input pots wired for b
2009-10-15 by henfieldj
Hi, I am looking to find the current draw for the CGS Steiner Filter and other CGS modules (at +/- 15V). Is there a file or database somewhere that I missed? Thanks in advance for the info, Henfield..................................
2009-10-12 by Ove Ridé
2009/10/12 Andrew Scheidler oozitron@... >: > Building a Morph-Lag, and have two questions: > > 1) The PCB specifies that C1 (see schemo below) is a "5uF MYLAR". Will a standard poly cap work OK? Or some other type? > It's a simple low pass filter so I'd guess the type is non-cri
2009-10-12 by Andrew Scheidler
Building a Morph-Lag, and have two questions: 1) The PCB specifies that C1 (see schemo below) is a "5uF MYLAR". Will a standard poly cap work OK? Or some other type? http://www.wiseguysynth.com/larry/schematics/Morph-Lag/Morph-Lag.gif 2) If I was to use 500k pots for the Attack &
2009-10-12 by Jan-Ahrent Czmok
On 11.10.2009, at 18:48, Dave Kendall wrote: > a shot in the dark here - bad decoupling capacitor on the neg rail? > > cheers, > Dave i changed two caps and now its (kind of ) working. the VCF does close to 90% on the LP but it seems HP is always open as similar on notch. behavio
2009-10-11 by Doug
Hi Drew, This is my first post here, but if your only going to use the disk types for power suppy decoupling, they are perfect for the task and generall alot cheaper than the poly types. You'd normally save the poly types for coupling between different stages of, say, an amplifie
2009-10-11 by Mark
On 10/11/09, Andrew Scheidler put forth: >For 100n decoupling caps I usually use the little box-shaped poly >ones. But I'm running out of those and realized I have several >dozen of them in "disk" form. > > >Will those work just as well? Yes, ceramic disc capacitors will actually
2009-10-11 by Dave Kendall
a shot in the dark here - bad decoupling capacitor on the neg rail? cheers, Dave On Oct 11, 2009, at 11:56, Jan-Ahrent Czmok wrote: > Hi there, > > got some issues with my finished CMOS VCF: > > -15V to ground -- 41.9k > +15v to gnd -- not measureable (but not 0) > > When connect
2009-10-11 by Andrew Scheidler
For 100n decoupling caps I usually use the little box-shaped poly ones. But I'm running out of those and realized I have several dozen of them in "disk" form. Will those work just as well? thanks :) Drew _________________________________________________________________ Hotmail: P
2009-10-11 by Jan-Ahrent Czmok
Hi there, got some issues with my finished CMOS VCF: -15V to ground -- 41.9k +15v to gnd -- not measureable (but not 0) When connected to the modular, i get a short. Stange is: before i connected ground to the GND panel, the module seemed to work. Any ideas ? --jan
2009-10-09 by Tony Mowbray
For all high resistance measurement, a higher voltage is required. At work we work in the hundreds of MegOhm region. The resistance testers we use, offer several hundred volts across the resistor under test. A DMM with a 9volt battery cannot compete, nor can it measure with any a
2009-10-09 by peng3002
--- In cgs_synth@yahoogroups.com , "Guy" wrote: > > Amazing to see how far off certain values can be, even with 1% resistors. > Well...if the resistor is off more than 1%, it is NOT a 1% resistor. > And, Ken, how important is it then to get those particular high values exactly ri
2009-10-09 by sasami@hotkey.net.au
Considering that the original resistors were probably 5%, I wouldn't be too worried about the difference between 22M and 20M. Ken >Thanks for all the replies so far, everyone ! > >Here's a rundown: > >- just replaced the DVM's batteries the day before. >- quite sure (like in:100%
2009-10-09 by Guy
Thanks for all the replies so far, everyone ! Here's a rundown: - just replaced the DVM's batteries the day before. - quite sure (like in:100%) that the '3' in '32" is just that: a number three :-) - the individual resistors do indeed measure correctly (pm). - I'm beginning to su
2009-10-09 by cg_synth
Most digital multimeters can't measure over 20M, if even that much. I often wonder why Serge thought such a miniscule bias current was needed. There's another spot where there is a 1M between the wiper of a pot and one end. I can't see that making a lot of difference either. ---
2009-10-09 by midiwall
And the 2M measures as 2M? What's the color banding? Any chance that the "3" in the 32M reading is actually an over-range indicator on your meter? --- In cgs_synth@yahoogroups.com , "Guy" wrote: > > I need a 22M resistor, so I solder two 10M's + one 2M in series. > However, when
2009-10-09 by Mark Pulver
And the 2M measures as 2M? What's the color banding? Any chance that the "3" in the 32M reading is actually an over-range indicator on your meter? ----- Guy (02:47 PM 10/5/2009) wrote: >I need a 22M resistor, so I solder two 10M's + one 2M in series. >However, when I measure the
2009-10-08 by intellijel
Just trying to put together a parts order for the Serge VCS. What kind of capacitors should I use? On the CGS site it looks like he used a lot of box capacitors in the photos (I assume film). Actually has anyone made a mouser parts list/project that they could share?
2009-10-06 by Richard Brewster
Something else to try is to measure the three resistors separately. This approach avoids the upper limit of the DVM. The total will be the sum of the three. Richard Brewster http://pugix.com Ehud Tamir wrote: > I suggest that you check the batteries in your DVM, I've seen more th
2009-10-06 by Ehud Tamir
I suggest that you check the batteries in your DVM, I've seen more than once that bad batteries, or battery if it's 9V, will create unreliable and wrong readings. Also, most of DVM's will measure up tp 20Mohms, and anything above would read as OL (overload - overrange). If you me
2009-10-06 by Ove Ridé
2009/10/6 Guy guy@... > > I don't understand why you say "it doesn't matter because the value is too high", Ove ? Of course it matters - I need 22M, not 32M. > 10M + 10M + 2M in series ought to be (around) 22M... > > I measure pre-mounted, and I don't touch anything with my hands
2009-10-06 by Guy
I don't understand why you say "it doesn't matter because the value is too high", Ove ? Of course it matters - I need 22M, not 32M. 10M + 10M + 2M in series ought to be (around) 22M... I measure pre-mounted, and I don't touch anything with my hands; just using the probes. Not sur
2009-10-05 by Ove Ridé
2009/10/6 Guy guy@... > > Yes, that could well be true. It's not a Fluke or anything fancy, but nonetheless not the cheapest one either... Though I get a bit suspicious when I see that it steps (it's not an autorange) from 2M to 20M and then to 200M. > > Thanks, Edward. I don't s
2009-10-05 by Guy
Yes, that could well be true. It's not a Fluke or anything fancy, but nonetheless not the cheapest one either... Though I get a bit suspicious when I see that it steps (it's not an autorange) from 2M to 20M and then to 200M. Thanks, Edward. _g --- In cgs_synth@yahoogroups.com , L
2009-10-05 by Loscha
Your typical domestic Multimeter really isn't optimized to measure anything beyond about 10M in my experience. As long as your individual amounts add up, you're in the clear. /Edward On Tue, Oct 6, 2009 at 8:47 AM, Guy guy@... > wrote: > > > I need a 22M resistor, so I solder two
2009-10-05 by Guy
I need a 22M resistor, so I solder two 10M's + one 2M in series. However, when I measure the end terminals, I end up with something like 32M ? When I measure in the middle *between* the two 10Ms (the 2M comes last), I get about 20M. Once again, I am puzzled by this illogical beha
2009-10-05 by Dave Kendall
On Oct 5, 2009, at 01:55, Andrew Scheidler wrote: > I was told (years ago) that I could just use 3904 transistors and put > them in backwards. The 3904 is easy to find and I've had no problems > with this substitution... Same here. The main difference I've found with 2N3904s (apa
2009-10-05 by Andrew Scheidler
I was told (years ago) that I could just use 3904 transistors and put them in backwards. The 3904 is easy to find and I've had no problems with this substitution... Drew To: cgs_synth@yahoogroups.com From: sasami@... Date: Sun, 4 Oct 2009 18:35:56 +1100 Subject: Re: [cgs_synth] C
2009-10-04 by sasami@hotkey.net.au
BC547 is "generic". I've used all sorts of NPN transistors in locations that I label as BC547. So, short answer, the substitution is fine. Ken >would it be a bad idea to substitute the BC549 for the BC547 called for in the digital noise circuit? thanks! > > > >-------------------
2009-10-04 by loop
would it be a bad idea to substitute the BC549 for the BC547 called for in the digital noise circuit? thanks!
2009-09-30 by sasami@hotkey.net.au
It works now :) The Parts FAQ is also linked from the bottom of the construction pages. I am amazed so few find it. Ken >FWIW, >the link doesn't work for me either from the home page. > >The big Red FAQ link works OK, but the link at the bottom of that page >to the Parts FAQ come
2009-09-30 by Ehud Tamir
Hi everybody, On this subject I can testify that I had no problem to reach the FAQ page this morning (after reading the original complaint), but trying again now,(after reading Mark's post) all i've got was truly theCGS home page. Hoever, I've made a PDF print copy of the FAQ, ns
2009-09-30 by Mark
On 9/27/09, misterb74 put forth: >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 capacito
2009-09-30 by Mark Olson
Hmmm... I sent my original message from home where I used my Mac, Safari, Camino, and Firefox, all no go. Now I'm at work and have tried a Mac with Safari and Camino, and a windows box with both firefox and ie, all still not go. As for viewing the source, regardless of where I am
2009-09-30 by Dave Kendall
FWIW, the link doesn't work for me either from the home page. The big Red FAQ link works OK, but the link at the bottom of that page to the Parts FAQ comes up with Error 404... cheers, Dave (using Safari on Mac) On Sep 30, 2009, at 07:04, Jason Proctor wrote: > that page works fi
2009-09-30 by Jason Proctor
that page works fine from here, and looking at the source it's absolutely bog-standard HTML. are you experiencing other connectivity issues? J (in San Francisco) >Ken: >This is such a useful faq; thank you. >Perhaps you already know, but something's not right with the link to >it
2009-09-30 by Mark Olson
Ken: This is such a useful faq; thank you. Perhaps you already know, but something's not right with the link to it on your Web site. I tried different browsers and none would get the page. Were it not for the link in your message I might never have seen this great resource. Thank
2009-09-29 by colorful.bottle
Still staring at this circuit. I'm determined to figure it out :) Is the End Out supposed to act like a flip flop? Is Pin 1 of the LM3900 supposed to be tied to ground? Thanks for any and all suggestions, -dustin --- In cgs_synth@yahoogroups.com , "colorful.bottle" wrote: > > Hel
2009-09-27 by sasami@hotkey.net.au
Try reading: http://www.cgs.synth.net/modules/parts_faq.html It should help you. Failing all else, you can just use the metalized polyester for everything. >Hi there, > >I'm in the process of putting together digital noise and tube vca modules, but I'm fairly new to this hobby an