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2016-02-26 by trimix83
Would like to try to implement the modification listed in the NOTES section of the assembly directions, but can't make sense of the schematics. I understand what it's trying to do, but the details are not clear. Has anyone done this? Can I find a sketch of what was done and where
2016-02-21 by phijel
Well, I'm a bit puzzled here. I realised increasing these 2 resistors value was in fact also increasing the voltage between the 2 transistors emitters : with 2 X 12K -> 16.48V between the 2 emitters with 2X 10K -> 15.12V with 2X 8K2 -> 13.12V so I went back to 2X 8K2 and it is no
2016-02-21 by phijel
I used a LM3900 and 3X CD4007UBE.
2016-02-21 by phijel
thanks Ken, will try that. cheers
2016-02-20 by cg_synth
If you used a MC3401, perhaps it was damaged. That might explain why it wants a bipolar gate. If you used an LM3900, it will be okay. The CMOS chips? They don't like anymore than 15V. If they refuse to do what they are meant to do, replace them. If they behave, you've been lucky.
2016-02-20 by Ken Stone
Try 12k to start with. IF that doesn't help, go to 15k. Cheers. On Sun, Feb 21, 2016 at 5:20 AM, philippe@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Please bear with me (it's only the 4th module I build, and the 3 first were working at first try ;-) ) What value would you
2016-02-20 by phijel
Please bear with me (it's only the 4th module I build, and the 3 first were working at first try ;-) ) What value would you suggest for the resistors in the voltage divider and in place of the second 8K2 (10K in my case) ? ph
2016-02-20 by phijel
thanks Ken I am sorry, wrong title, I build it as a triple Bi-di router, not a switch And I've built it for 15V, so I placed 2x 4K7 instead of 2K2 and 2X 10K instead of 8K2. But I forgot to check the voltage between the 2 transistors emitters as you suggest. I did now, and it's a
2016-02-20 by Ken Stone
It should work with a 0-5 v gate. It's detection point is controlled by the 8k2 and 10k connected to the 1M5 resistors. Decreasing the 82k further (or increasing the 10k) should raise the detection point higher. But first, make sure it's built properly. On Sat, Feb 20, 2016 at 11
2016-02-20 by phijel
Hello I am currently building this module (fully populated, but only the top section wired so far) and I am surprised to discover the control signal has to be bipolar to work (I was expecting it would with a standard 0-5V gate) Is it normal ? Would there be an easy way to make it
2016-02-16 by gord_harris
Well I finished wiring it today and it worked right off the bat - no debugging required. Thanks Ken for a perfect board and good documentation. Three down - five more boards to go and hopefully more if they become available...
2016-02-15 by gord_harris
Thank you for the excellent designs Ken for DIYers like us.
2016-02-14 by JAMIE logan
if your stopping the selling are you also going to pass on this group also thanks for your hard work and diy designs and bringing diy serge On 14 February 2016 at 02:36 "Ken Stone otherunicorn@... [cgs_synth]" wrote: I am likely to pass it all to Elby-Designs. Boards should conti
2016-02-14 by Ken Stone
I am likely to pass it all to Elby-Designs. Boards should continue to be available. On Sun, Feb 14, 2016 at 1:26 PM, Ove Ridé nitro2k01@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Are you negotiating with someone regarding taking over the production of PCBs? If not, would
2016-02-14 by Ove Ridé
Are you negotiating with someone regarding taking over the production of PCBs? If not, would you consider releasing the schematics and board layout under some open source license that would allow people to make their own boards, or possibly sell them? Having access to gerbers wou
2016-02-14 by Neil Baldwin
It takes an enormous effort to curate a body of work like the CGS board collection. I certainly and sincerely hope this is a personal decision and not one forced by recent usurpers. Good luck Ken Sent from BlueMail On 14 Feb 2016, at 00:34, "otherunicorn@... [cgs_synth]" cgs_synt
2016-02-13 by cg_synth
Like a ton of bricks. It got too heavy.
2016-02-13 by Dave
Yes, thank you! On 13 February 2016 23:45:04 -23:00, 'Jeff Brown' guitaricon@... [cgs_synth] wrote: Like, dropped by accident, or more like a hot potato? ;^) Either way, thank you so much for carrying it all of these years! From: cgs_synth@yahoogroups.com [mailto:cgs_synth@yahoog
2016-02-13 by Neil Baldwin
What!? End of an era! Thanks Ken for all of your efforts and endless patience :) This is actually quite weird. Your name will always be synonymous with Serge DIY for me. Neil Sent from BlueMail On 13 Feb 2016, at 23:45, "'Jeff Brown' guitaricon@... [cgs_synth]" cgs_synth@yahoogro
2016-02-13 by Jeff Brown
Like, dropped by accident, or more like a hot potato? ;^) Either way, thank you so much for carrying it all of these years! From: cgs_synth@yahoogroups.com [mailto:cgs_synth@yahoogroups.com] Sent: Saturday, February 13, 2016 5:57 PM To: cgs_synth@yahoogroups.com Subject: Re: [cgs
2016-02-13 by JAMIE logan
i wood love todo these On 13 February 2016 at 22:56 "Ken Stone otherunicorn@... [cgs_synth]" wrote: I've dropped it. Awaiting for someone else to pick it up. Give it a day or two. Ken On Sun, Feb 14, 2016 at 5:13 AM, waveguide@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Th
2016-02-13 by Ken Stone
I've dropped it. Awaiting for someone else to pick it up. Give it a day or two. Ken On Sun, Feb 14, 2016 at 5:13 AM, waveguide@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: This message has appeared on his for sale page: Closed Please wait for future announcement as to where
2016-02-13 by x24holsey
This message has appeared on his for sale page: Closed Please wait for future announcement as to where you can aquire CGS boards. Ken did you sell or pass the baton?
2016-02-09 by gord_harris
Thanks Charlie - that looks very clean. I find the original serge arrows and whatnot a bit cryptic so if anyone knows the history and rationale behind them all I would be interested, but for now with just SketchUp I will simplify things. My son is learning Illustrator so I might
2016-02-09 by charles kerr
Hi Gord, I've got a few designs on my blog for this: Loudest Warning Loudest Warning loudestwarning View on loudestwarning.tumblr... Preview by Yahoo maybe specifically this one: http://loudestwarning.tumblr.com/image/138346898886 Nothing wrong with laminated paper! (I saw you ne
2016-02-09 by gord_harris
My CGS75 VCS PCB V1.0 is stuffed and it's time to make a panel. I have seen several variations in web research and a lot of traffic about this very versatile module. But as a newbie to SERGE and CGS does anyone have a relatively simple panel design that corresponds well to the bo
2016-02-08 by Boris Klompus
Awesome! I'll be building the Slews, Ring Mod and more soon. Just need to sell some gear and buy the components. Can't wait! Are you doing any mods -- loop switch, or exponential control pot? Boris On Mon, Feb 8, 2016 at 11:20 AM, gord@... [cgs_synth] cgs_synth@yahoogroups.com >
2016-02-08 by gord_harris
CGS82 up and working fine! My second CGS SERGE module built - lots more to go. Thanks Ken for a perfect board and great design with Serge. And thanks to Chris for helping me source the LM3046 from Small Bear Electronics in New York. Next up, CGS79 Ring Modulator I think....
2016-02-07 by gord_harris
Oops - it works fine now - my bad. Pulled IC, checked resistances and found MY MISTAKE - colour confusion 51 ohm for 1meg duh! So I can confirm this CG83 board works fine as is. One down, lots more boards to go! Sorry for the confusion, Gord
2016-02-07 by gord_harris
Well I am pleased to have my first CGS Serge module wired and powered up - CGS83 positive slew. The top half is working fine and is very cool, but the bottom half fails to oscillate when neg pulse out connected to start or sustain. I have been comparing voltages between modules a
2016-02-07 by gord_harris
Thanks Boris I will check them out.
2016-02-07 by gord_harris
Thanks Chris! Nice to see you on this board. My latest ones from Mouser are better so I guess I just have to be much more careful checking the mechanical drawings on leg size.
2016-01-24 by waveguide
Hey Gord, Yes, the same Chris from IMAX days. Kens trimpot footprints I am going to assume might be 6mm and 9-10mm. Can’t say I took a survey up until now. I’d been looking at this lately, Mouser has Piher pots that look like they will fit. Something about these trimpots appealed
2016-01-24 by Boris Klompus
I'm plannng on using these trimpots: http://www.mouser.com/ProductDetail/Vishay/T93YB253KT20/?qs=%2fha2pyFaduidPxk%252bN998c9%2fLnPZb%2fimsl7grm0lD%252bJ1ZAD1cuFMenQ%3d%3d mouser p/n: 72-T93YB-25K where the "B" gives the 'y' shape spacing in legs.. see the datasheet (A would give
2016-01-24 by gord_harris
Well Boris I am building one now but don't have all the parts on hand yet, nor CGS67. I can compare it to my vintage ring mod I built from electronotes way back though, when I am done. Ask again in a few weeks. Cheers Gord
2016-01-24 by gord_harris
I am trying to find the perfect fit for Ken's boards. Any North American guys know a good Mouser Part number by chance? I have tried two styles but both required drilling out the boards a bit to fit. These are typically 25K or in range from 20 to 30K on the six boards I am in pro
2016-01-21 by Ken Stone
No idea. Diodes in backwards? Transistors in backwards? Missing your main cap? Look for some sort of construction error that you would have repeated. Ken On Thu, Jan 21, 2016 at 1:20 PM, piano392003@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: I'm resurrecting this message
2016-01-21 by piano392003
I'm resurrecting this message in the hope that somebody can help me. I ordered these PCBs from Ken Stone in 2013. It comes in a pair of two. I built one with parts that I sourced from mail order. I built the second one from parts that I sourced from Elby Designs, at least a year
2016-01-21 by gord_harris
Thank you! I will also try that out with some discrete transistors - very useful link for matching. Cheers Gord
2016-01-20 by gord_harris
Hey Chris - is that you from IMAX days? Cool! thanks so much - very helpful. Thanks for solving my problem with this one. I will order some. What are you building these days? Cheers Gord
2016-01-17 by Boris Klompus
Thanks Richard! I'll check out the others as well. The Mattson looks interesting, wish it was a bare board though. The CGS79 has my attention because of the sweeping. I'll give this one a try I think. I like the sound of the ring mod in the TTSH a lot, and the schematics look som
2016-01-17 by Richard Brewster
I have one. http://pugix.com/synth/serge-ring-mod-phaser-and-resonant-equalizer/ Also a CGS67 in my Quantisise Blue panel. http://pugix.com/synth/the-blue-panel/ Also a couple of MOTM-190 http://pugix.com/synth/motm-190-micro-vca/ The Mattson VCA contains a ring mod input in addi
2016-01-17 by Boris Klompus
Hello, Does any one have experience with this module? I'm curious about the differences in the audio inputs and the voltage control inputs. Can anyone that has both this module and a different ring mod, for instance CGS67 notice any practical differences? I assume those VC inputs
2016-01-02 by waveguide
Hi Gord, Happy New Year http://smallbear-electronics.mybigcommerce.com/ic-lm3046n $2.25 Chris Holsey On Jan 2, 2016, at 2:49 PM, gord@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Has anyone found a substitute for these cheaper than buying overseas or on ebay for ~ $6 US? Ne
2016-01-02 by cg_synth
There are a few compatible devices about, or you can use a set of matched, regular transistors. See Ken Stone's Modular Synthesizer Ken Stone's Modular Synthesizer Descriptions of the various modules in a home built music synthesizer. View on www.cgs.synth.net Preview by Yahoo
2016-01-02 by gord_harris
Has anyone found a substitute for these cheaper than buying overseas or on ebay for ~ $6 US? Need some for CGS82 Negative Slew. Thanks Gord
2015-12-30 by Ken Stone
http://www.cgs.synth.net/modules/cgs09_vcd.html " This module requires setting up. Feed an audio signal into the Clock In input. Monitor the output at HO Pulse Out. With the control voltage set at 0 volts, adjust the OFFSET trimmer until the input frequency equals the output freq
2015-12-30 by Stephen Richards
Hi Ken and all I am spending the holidays going through all of my 7 BoCGS and Serge panels; i'm calibrating , perhaps modding , sorting out 5 year old newbie build errors and generally making them all even more awesome. I am into the BOG panel at the moment and trying to aquaint
2015-12-28 by Stephen Richards
Thanks Ken I'll have another look. -------------------------------------------- On Mon, 12/28/15, Ken Stone otherunicorn@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Subject: Re: [cgs_synth] CGS76 - Serge Envelope Generator. END Output no working. To: cgs_synth@yahoogroups.
2015-12-28 by Ken Stone
All I can say is look at the parts around the MC3401. Make sure the diodes are the right way around. Make sure there are no bad connections. Other than that, you'll need to get a scope onto it and watch what's happening. Ken On Mon, Dec 28, 2015 at 12:04 PM, Stephen Richards okay