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2007-07-17 by sasami@hotkey.net.au
It sounds like your PSU isn't up to the job. Try adding 100uF across each of the power rails to earth. Ken >Hi, > >I built two cgs65 from the rev. 1.1 pcb and with one vco >they function fine. But as soon as i connect a second vco >to the powersupply, the vca starts oscillating o
2007-07-17 by drsyncenstein
Hi, I built two cgs65 from the rev. 1.1 pcb and with one vco they function fine. But as soon as i connect a second vco to the powersupply, the vca starts oscillating on it's own. The audio of the vco is not even connected a that point and the vca audio is not routed to the vca in
2007-07-13 by sasami@hotkey.net.au
That would work. It would drop your ourpur pulses to about 6 volts, which may also be a good thing. You could also run a LED with its own dropper resistor directly between the emitter and ground, which is how I do it these days. Ken >I want to add LEDs indicators to the outputs o
2007-07-13 by Andrew
I want to add LEDs indicators to the outputs of a Pulse Divider (cgs36) and found a posting of how to do so. ("...bung a 1k across each of the 100k pulldowns...") Before I mess things up (as I am good at messing things up), can anyone take a peek at the below circuit pic? I made
2007-07-10 by Andrew Scheidler
One neat ability of the Sequential Switch is to change directions, and the direction is controllable by CV :) I'm currently up to my nipples in a monster sequencer panel. Hoping to have it together and running in about two weeks... Drew synthwick synthwick@... > wrote: I was goin
2007-07-09 by david wright
ahoy i believe i was using 2 different lfos into the gated comparators clock and noise in. actually i think i had an lfo into a pulse divider, which then had a slow and a fast division sent to the comparators inputs. yes the chime simulator is on that mp3 - i didn't have any cyna
2007-07-09 by synthwick
Hello again. Sorry for flooding the list w/ posts these past few days, but Im just getting back into this after a long break. I tried searching first, but didn't come up w/ anything. In the CGSDRUMS file, what modules are you using? Am I hearing the chime simulator in there, or i
2007-07-09 by sasami@hotkey.net.au
>I was thinking about the analog switch (cgs55), but Im not sure how >the switch works. Does it switch on w/ a pulse, then back off w/ >another pulse, or does it switch on while it has a gate, then back off >when the gate is removed? (I'd feed 1v into the input of the switch, >se
2007-07-09 by sasami@hotkey.net.au
> I find the switches section to be the most interesting. You can have >the full length high or a high that lasts half the clock cycle. >EXTREMELY useful!!!!!!! >Ken, is this idea original to you? I have never seen another sequencer >that does this. Very cool. Yes, it was my orig
2007-07-09 by b h
sorry all this wasn't meant to be directed to the group :( B >From: "b h" bamsyn@... > >Reply-To: cgs_synth@yahoogroups.com >To: cgs_synth@yahoogroups.com >Subject: RE: [cgs_synth] Re: Sequencer (gate, maybe) >Date: Mon, 09 Jul 2007 13:32:56 +1030 > >Hi > >I was wondering if you
2007-07-09 by b h
Hi I was wondering if you happen to be the peng i bought some 1\4 jacks from a while ago? If you are i was wondering do you ahve anymore left for sale? cheers Brett >From: "peng3002" peng3002@... > >Reply-To: cgs_synth@yahoogroups.com >To: cgs_synth@yahoogroups.com >Subject: [cgs
2007-07-09 by synthwick
I was going to build one gate seq. and have two switch boards on it (4 rows), but have now decided to build 2 complete gate sequencers (w/ the gates and CV's on each) and that way I can run each off a different division of the clock if I want. It was tough to decide between the s
2007-07-08 by Jason Proctor
another optimisation i was thinking of was that you could effectively get extra "slaved" gate sequence tracks just by feeding the clock into the gate output module. effectively you would have a "gate mix" input, which would be ORed with the multipin inputs, feeding the gate enabl
2007-07-08 by peng3002
--- In cgs_synth@yahoogroups.com , "synthwick" wrote: > > Then my last question, would this be a functional sequencer? I love my gate sequencer. I built it pretty much stock. I'm going to modularize one similar to what Jason describes in his post. At the moment, when I need it to
2007-07-08 by Jason Proctor
i was thinking of getting a sequencer started soon too. after looking around this is what i kinda decided on -- - minimal cgs28 module containing just the basics - clock in/out, reset jack/switch, up/down jack/switch, master (mix) gate out, cascade in/out (custom add-on), LEDs, 8
2007-07-08 by sasami@hotkey.net.au
Best to use greencap, mkt, mks poly film types. Ken >I'm getting ready to build a few of your modules, and am in the >process of ordering parts. I hate to ask such a basic question, but >what kind of capacitors should I be using. I know that for >decoupling, ceramic is fine. >I'm
2007-07-08 by synthwick
I'm getting ready to build a few of your modules, and am in the process of ordering parts. I hate to ask such a basic question, but what kind of capacitors should I be using. I know that for decoupling, ceramic is fine. I'm planning on building the drum simulator, cynare, chime,
2007-07-08 by sasami@hotkey.net.au
It should work fine. Use 100k pots and a single set of buffer transistors. No need to have a set of buffer transistors per row of pots. Ken >Hello, >I've been wanting a sequencer for a long time now, and so I guess it's >finally time to build one. I want a lot of trigger/gate out
2007-07-07 by synthwick
Hello, I've been wanting a sequencer for a long time now, and so I guess it's finally time to build one. I want a lot of trigger/gate outputs to control drum sounds, and a couple of rows of CV output. Would there be any problem in building the gate sequencer w/ two of the switch
2007-07-02 by Laurie Biddulph
There have been some recent, mysterious, sitings of a large black cat prowling around the neighbourhood. to date there has been little evidence to support the existence of this mystery other than some gossip and a few `vague' photos.......... until now! Putting the joviality to o
2007-06-26 by sasami@hotkey.net.au
No problems with 5%. They are just part of the gate outputs. Ken >I accidently ordered 5% 820R resistors instead of 1% > >Is there going to be any problem using those 5% 820's in the Sequential >Switch ? Or should I order the 1% ? > >Drew > > > >The CGS Modular Synth home page: h
2007-06-26 by Andrew
I accidently ordered 5% 820R resistors instead of 1% Is there going to be any problem using those 5% 820's in the Sequential Switch ? Or should I order the 1% ? Drew
2007-06-23 by thealisonproject
I finished my Dual Tube VCA today, this thing is great. I added the DPDT switch like mentioned in this topic and there is no pop at the output when switched, works perfectly... Adding feedback is where I really like this thing, pure crunch... --- In cgs_synth@yahoogroups.com , sa
2007-06-23 by stuadh
Hi, I'm building a CGS Programmer with some modifications. I'm well into the build now but I'm still refining my mods. Can anyone tell me what the max output voltage from the rows is (assuking that ±15V is used)? Yours Aye Stuadh
2007-06-23 by stuadh
Hi, I'm building a CGS Programmer with some modifications. I'm well into the build now but I'm still refining my mods. Can anyone tell me what the max output voltage from the rows is (assuking that ±15V is used)?
2007-06-23 by sasami@hotkey.net.au
>Really? Ken, should we replace all LM358 with LT1013? If you have troubles, yes. If it works, leave it alone. I've mentioned on a few pages that the LM358 varies too much between batches to be reliable. My original protos were made with what appears to have been an exceptional b
2007-06-23 by Jason Proctor
as i understand it, if an LM358 is working in place then that's fine. i have a bunch in service with no problems. but apparently Ken has had bad batches of 358s and with that in mind usually advises replacing them with TL072s in bipolar applications and MC34072s or LT1013s in uni
2007-06-22 by Richard Brewster
Really? Ken, should we replace all LM358 with LT1013? Richard Brewster http://www.pugix.com Jason Proctor wrote: >> The LT1013 is listed as an improved LM358. >> > > yes indeed. Ken is suggesting replacing the LM358 as he's had bad > experiences with them. >
2007-06-22 by Jason Proctor
>On 6/21/07, Jason Proctor put forth: >>suggest LT1013 instead as it's a unipolar supply? > >The LT1013 is listed as an improved LM358. yes indeed. Ken is suggesting replacing the LM358 as he's had bad experiences with them.
2007-06-22 by Mark
On 6/21/07, Jason Proctor put forth: >suggest LT1013 instead as it's a unipolar supply? The LT1013 is listed as an improved LM358. >i remember bad things (tm) happening with me + TL072 + unipolar supply I don't think it's you :) Afaik, there is no way to run a TL072 single-sided.
2007-06-21 by bill bigrig
Howdy, I thimk the way it's wired is throwing in an extra pulse when ou push the button. I can only see half the schematic in the attachment. on the 4017, you have to wire the reset AND the 0 output to the step you want to stop at. I would try eliminating the signal to the clock.
2007-06-21 by sasami@hotkey.net.au
>suggest LT1013 instead as it's a unipolar supply? or MC34072 Ken _______________________________________________________________________ Ken Stone sasami@... Modular Synth PCBs for sale http://www.cgs.synth.net/ > Australian Miniature Horses & Ponies http://www.blaze.net.au/~sas
2007-06-21 by Jason Proctor
suggest LT1013 instead as it's a unipolar supply? i remember bad things (tm) happening with me + TL072 + unipolar supply >What you did should in no way have caused what you are seeing. Are you still >using an LM358? If so, try a TL072 instead. > >Ken
2007-06-21 by sasami@hotkey.net.au
What you did should in no way have caused what you are seeing. Are you still using an LM358? If so, try a TL072 instead. Ken >Well I took the "Experiment with it!" suggestion, but probably >shouldn't have since I don't know what I'm doing all that much :) > >My Gate Sequencer was
2007-06-21 by Andrew
Well I took the "Experiment with it!" suggestion, but probably shouldn't have since I don't know what I'm doing all that much :) My Gate Sequencer was running fine. I had replaced the 4017 with the proper chip (I originally had the HCF version in there) and that had stopped all t
2007-06-21 by sasami@hotkey.net.au
>Question #1) What kind of modifications, if any, would be necessary if >I were to use this module with effects pedals instead of a modular? Replace the 100k input resistors with 1M ones. >Question #2) Is there anything I should know about trying to expand the >circuit to 8x8 or
2007-06-20 by rafe127
Hi All, I have gotten several strong recommendations for the CGS33 Matrix Mixer following a post I made on AH and SDIY. Question #1) What kind of modifications, if any, would be necessary if I were to use this module with effects pedals instead of a modular? Question #2) Is there
2007-06-19 by sasami@hotkey.net.au
I see no real problem. You may get a thump on the output when switching, but that's all. Ken >Regarding the 330K resistors, do you see any problems using a DPDT toggle > >1. connecting 330K to negative rail and pin 4 of tube to pin 2 > >2. connecting 330K to pin 1 of tube and pin
2007-06-19 by The Alison Project
Regarding the 330K resistors, do you see any problems using a DPDT toggle 1. connecting 330K to negative rail and pin 4 of tube to pin 2 2. connecting 330K to pin 1 of tube and pin 4 of tube to pin 1 thanks Chris [Non-text portions of this message have been removed]
2007-06-19 by sasami@hotkey.net.au
in simple terms, Hfe = gain Vbe is the voltage dropped across the base-emitter when the device is forward biased - i.e. the base-emitter diode voltage drop. Ken > That's a very good question. I would like to know too. This is a great >thread. Lots of good info. > >thanks folks >p
2007-06-19 by Pete
That's a very good question. I would like to know too. This is a great thread. Lots of good info. thanks folks pete On 6/18/07, bill bigrig billbigrig@... > wrote: > > Howdy, > > This is going to sound stupid, but after trying > tosize transistors for a project, I have NO idea wh
2007-06-19 by bill bigrig
Howdy, This is going to sound stupid, but after trying tosize transistors for a project, I have NO idea what HFE or Vbe is. Could you give me a brief explanation/ Thanx Rig --- Louis van Dompselaar louis@... > wrote: > > > Would matching with the transistor tester in a DMM > do t
2007-06-17 by James Dunn
Thanks for this tip. The circuit is working ok off 9v, but it's starts oscillating when the frequency control is at maximum. Is there a resistor value or something I can change to prevent this from happening? sasami@... wrote: > > Hang some electros across your new voltage divide
2007-06-15 by sasami@hotkey.net.au
>I want to *mix* the outputs of SS #1 and SS #2, but I'm concerned about >how high the total voltage could be (20 volts?). If I take the output >of SS #2 and patch it into the MIX IN of SS #1, will this keep the the >output of SS #1 to 10 volts or less? Or should I use a Mixer mo
2007-06-15 by Andrew
I'd like to build a dual Sequential Switch module, with the two SS's completely independent. One thing I would do with them is have SS #1 running from a clock, and SS #2 running from the same clock divided down to /8 speed. So SS #1 plays a sequence, and SS #2 provides a transpos
2007-06-08 by Ehud Tamir
Hi people, I may be mistaken, but there is a distinction between ground connection and common line. I believe that the "down arrow" designates a common line connection, which depending on circuit configuration may have the value of 0V, Pos supply or Neg supply or any other value
2007-06-08 by Dave Kendall
On 8 Jun 2007, at 19:16, Louis van Dompselaar wrote: > That can't be "instead of". Those are two completely different > things... That's what I mean - I've seen some schematics where the down arrow indicates a connection to GND. Most schemos I've come across show a down arrow con
2007-06-08 by Louis van Dompselaar
That can't be "instead of". Those are two completely different things... > the use of a downward pointing arrow for GND instead of -V
2007-06-08 by Larry T.
okay then. I'm not that used to +/- supply layouts. I remember the following 'text' diagram as ground: | | ----- --- - That's how I missed it. Does Jim's test setup expect a bipolar (+/-) supply or just a + supply? I'm guessing just the +12 if the symbol above D.U.T. is ground. L
2007-06-08 by Dave Kendall
Larry asked the question I didn't dare, lest I got categorized as being in permanent blonde mode.... Relieved to see it wasn't only me that wondered.... Seeing as the bottle of peroxide is on the table now, does anyone else find the use of a downward pointing arrow for GND instea