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2012-08-22 by david.salter@thomsonreuters.com
Nice one Stephen, All mine are now sold, thank you everyone. David · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · David Salter Senior Consultant Solutions Services EMEA North Thomson Reuters O +44 (0)20 7542 2402X 52402 M 07990562402 david.salter@..
2012-08-21 by Stephen Richards
Hey Brian I have a stompbox adapter PCB i'm not going to use. Contact me off forum if you want to get it , i'm in Melbourne. Stephen ________________________________ From: " david.salter@... " david.salter@... > To: cgs_synth@yahoogroups.com Sent: Wednesday, August 22, 2012 1:39
2012-08-21 by david.salter@thomsonreuters.com
Tell me about it. However these are $20US a piece on the CGS website so………………………. · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · David Salter Senior Consultant Solutions Services EMEA North Thomson Reuters O +44 (0)20 7542 2402X 52402 M 07990562402
2012-08-21 by brian walker
Hi David Thanks for the reply Talk about sending coal to Newcastle Brian ________________________________ From: " david.salter@... " david.salter@... > To: cgs_synth@yahoogroups.com Sent: Tuesday, 21 August 2012, 8:24 Subject: RE: [cgs_synth] CGS46 - Stomp Box interface PCB's for
2012-08-21 by david.salter@thomsonreuters.com
Hi Brian, Glad the DLFO stuff arrived OK. At present I think all the CGS46’s are taken, but depends on how postage works out for a guy in Oz. I’ll let you know either way. Cheers David · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · David Salter Seni
2012-08-20 by brian walker
Hi David Over the weekend I was asked if it was passable to use synthesizers with a guitar. Yes being the reply but you will need an adapter Just got home and found the Haxter PCB on the mat and thought I better say THANKS when this email pops up Dam could have saved you some pos
2012-08-20 by d_salteruk
Hi all, CGS Stomp box adapter £5 each http://www.cgs.synth.net/modules/cgs46_sba.html I have 10 of these Free post in UK (where I am based) E-mail direct please Thanks David
2012-08-19 by Loscha
Hi All, I've got a few boards I never got around to using. Steiner Filter Sub-Oscillator Board I'm in Noble Park Melbourne, work in Abbotsford. Make me an offer? Comes free with 4 x LED driver boards. [Non-text portions of this message have been removed]
2012-08-08 by Guy
I can testify to that. The CA3130 is the only chip I ever killed, just by looking at it... So to speak. Alas, in some cases, the CA3140 does not always work (or work properly) where a CA3130 is asked for. _g --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > CA3130 can only
2012-08-08 by sasami@hotkey.net.au
CA3130 can only handle half the voltage of the CA3140. It is also unbelievably fragile. That is one chip that any static at all will kill. CA3140 was developed to replace it. > >Thanks to all reply i have another question, the reason of the destruction is the negative voltage on
2012-08-08 by Carlos
Thanks to all reply i have another question, the reason of the destruction is the negative voltage on the ca3031? --- In cgs_synth@yahoogroups.com , "cg_synth" wrote: > > > Look for LM3140. > > CA3130 will be destroyed in this circuit. > > --- In cgs_synth@yahoogroups.com , "Carl
2012-08-07 by Stephen Richards
Try the ebay seller from China called POLIDA or Tayda Electronics , they both have them for just over $2 for 5 pieces with Free Shipping. I have always found POLIDA to be a trustworthy ebay seller and buy from Tayda regularly. http://www.ebay.com.au/itm/5PCS-IC-INTERSIL-DIP-8-CA3
2012-08-07 by Kyle Stephens
I have some to spare. Email me off list, I'll send you my address and if you mail me a stamped, addressed envelope back to yourself I'll put send you one (they were only $0.79 each, and I'm generally generous). Alternatively, you can go to the source where I got mine from in Sant
2012-08-07 by cg_synth
Look for LM3140. CA3130 will be destroyed in this circuit. --- In cgs_synth@yahoogroups.com , "Carlos" wrote: > > Hi i have a lot of problems to locate the ca3140, is possible replace for the CA3130? > > thanks >
2012-08-07 by Carlos
Hi i have a lot of problems to locate the ca3140, is possible replace for the CA3130? thanks
2012-07-24 by goldencardigan
Well I finally found the problem. The diode that is connected between pin 5 of the TL072 and the 2N3906 was leaking. It was the source of the stray voltage into Pin 5 that was blocking any signal on the "In" jack. I've never had any problems with diodes before, but on this build
2012-07-19 by goldencardigan
Thanks Darren, I have been searching both forums, but so far I haven't found anything that helps. I think I'm getting closer though. I think there is some stray DC floating around, but I haven't been able to track down where it is coming from. I've noticed that there is around +5
2012-07-18 by Darren Shorsky
There is two really good threads on Muff's & electro about this build...... sorry, i don't have the link. If you try those forums???? d. To: cgs_synth@yahoogroups.com From: dean.lowe@... Date: Wed, 18 Jul 2012 01:07:24 +0000 Subject: [cgs_synth] CGS75 VCS problems Hi all, I'm new
2012-07-18 by sasami@hotkey.net.au
Try swapping your chips between the sections and see if the fault stays, or follows the chips. If it follows the chips, you have a failed chip. I had a bad chip in my prototype that stumped me for a while. Apart from that, it worked fine. Ken >Any one built this yet ? i have one
2012-07-18 by meech
Any one built this yet ? i have one populated but it isn't working. one led lights up and stays on while the other does not. Meter just reads a constant voltage the silicon used: CA3046, lm3900 and bc547 pcb http://www.coa-modular.com/wp-content/uploads/2012/07/pcbnegslew.jpg pan
2012-07-18 by goldencardigan
Hi all, I'm new to the group as this is really my first CGS build. I have built lots of diy modules and I have learnt alot doing so, but I am no electronics engineer. When placed in cycle the module appears to work perfectly. It cycles between 0 and around +6v. All the pots work
2012-07-15 by Joachim
Hello, I have finally found the time to test a 20K 10-turn pot for the speed pot on a CGS58 but I have at least one error somewhere: The mods I installed are: - 20K speed pot (10-turn) instead of 100K, tested it with a normal 100K pot which didn't change the odd behavior - 4K7: A
2012-07-13 by sasami@hotkey.net.au
>Hey.. > >searched this question on the forum, but didnt find that it had been asked, which makes me more embarrassed to ask it.. > >confirming the trimmer pot pin config has pin 3 going through the 1k5 resistor connecting to the centre tap.. > >confirmation is appreciated Ultima
2012-07-13 by Scott Deyo
Sorry about that Robert. The latest drama left me email-less for almost a week. The cable worked fine after the big storm felled four trees in our yard, but when we pulled a huge stump out -- snap went the cable! The "link" switch is connected between the "C" pads on the two boar
2012-07-13 by dtor_tempo
Hey.. searched this question on the forum, but didnt find that it had been asked, which makes me more embarrassed to ask it.. confirming the trimmer pot pin config has pin 3 going through the 1k5 resistor connecting to the centre tap.. confirmation is appreciated
2012-07-01 by robert
Hello, I have the bridechamber analog switch matrix/weighted random switch kit. I have no problem building the boards but I am a little confused about which wires go to which jacks and pots. Does any one have a reference diagram? Thanks Robert
2012-06-15 by jonbstevens@hotmail.com
Makes sense, thanks Ken! Jonathon To: cgs_synth@yahoogroups.com From: sasami@... Date: Fri, 15 Jun 2012 11:45:18 +0000 Subject: Re: [cgs_synth] CGS114 DUSG PCB and Schematic don't match? it only controls LED brightness/response. If you don't like the behavior, try the other value
2012-06-15 by sasami@hotkey.net.au
it only controls LED brightness/response. If you don't like the behavior, try the other value. Honestly, I cannot remember anything about that. Ken >Hi, > >Populating my DUSG boards tonight and I noticed in the schematic the 150k resistor connected to the DC OUT (the one close to
2012-06-15 by jonbstevens
Hi, Populating my DUSG boards tonight and I noticed in the schematic the 150k resistor connected to the DC OUT (the one close to the LED), is labelled 47k on the PCB. There's also no 150k resistors in the parts list. So am I correct in following the PCB? or the schematic? Thanks!
2012-05-30 by fuyuhiko
Thank you very much for the information that I need a DUAL SUPPLY. I think I will try a linear dual supply which is made in the UK as there seems to be less trouble. Thanks for all the comments. --- In cgs_synth@yahoogroups.com , "r" wrote: > > I use linear PowerOne or Condor pow
2012-05-29 by r
I use linear PowerOne or Condor powersupplies. YOU NEED A DUAL SUPPLY. Power One HAA15-0.8 is an example. used, these are almost always cheaper than the parts to build would cost, especially the transformer. b --- In cgs_synth@yahoogroups.com , "fuyuhiko" wrote: > > Thanks for al
2012-05-28 by Scott Young
I've built two of these: http://www.oakleysound.com/psu.htm Best bit about it is you use a low voltage mains adaptor to take the voltage down from mains, reducing the risk considerably. Easy build and I've been using mine for months now with no issues.
2012-05-28 by fuyuhiko
Thanks for all your kind reply. Having found some liner power supplies on the internet, I've wondered if I need to get dual supplies or single one with a ground port. For instance: http://www.tti-test.com/products-tti/pdf-brochure/psu-el-series-4p.pdf Or should I use the likes of
2012-05-28 by Elby Designs
For a safer build have a look at my All-In-One Power Module Don't forget that US power is 110VAC and UK is 230VAC so check the power label!!!! Best Regards Laurie Biddulph Mobile: 0400 257 645 Phone: +61 (0)2 4340 0938 Web: www.elby-designs.com Elby Designs 9 Follan Close Kariong
2012-05-28 by electronicpresskit
There are lots of used linear power supplies on ebay that can be had for cheap. They are in the U.S. so shipping to the UK makes it less cheap but it's still probably the easiest way to go. Power One or Condor are the standard brands so just search for Power One linear power supp
2012-05-28 by fuyuhiko
Hi there. I'm quite newbee. I'd like to make some DIY synthesizers. First of all, I don't know how to get positive as well as negative 15V DC. I know how to get negative 9V by using batteries. But building the power supply unit seems a bit dangerous for me at the moment. Is there
2012-05-27 by Kyle Stephens
Here comes another one... BAY AREA SYNTH MEET 2012 (Apologies for x-posting spam, and hopefully this time BCCing the message won't get it caught in the lists' spam filters) When: Saturday, July 14, 2012 11:00am until 6:00pm Where: SAE Institute of Technology 450 Bryant Street, Sa
2012-05-26 by Stephen Richards
Thanks Richard ! Great advice on both posts. I did tune it down in the bass on the DUSG. May have to check out the VCO calibration process a bit further , later. ________________________________ From: Richarius Molindarius richmolindarius@... > To: cgs_synth@yahoogroups.com Sent:
2012-05-26 by Richarius Molindarius
That modification does work very well. :) My USGs are tracking wonderfully over at least 2 octaves. I'm fairly sure, 3 octaves. (In the bass frequencies. They're wonderful for using as bass range VCOs. :) ) (Gotta get more of them. 4 isn't enough. :o ) -- Take care, Warmth and Pe
2012-05-26 by Richarius Molindarius
Lately, when I've been recalibrating my Ken Stone; Ian Fritz; Thomas Henry and Ray Wilson VCOs, I've been disconnecting all 'CV input' (including the previous Coarse and Fine pots), to tune the VCOs to 1V/oct. from an otherwise 'Ground' reference. (To set my initial frequency at
2012-05-26 by sasami@hotkey.net.au
If I understand you, yes. You are putting the trimmer in series with the existing resistor. Only two connections to the trimmer are needed. Ken >Would i wire it : resistor > outer leg of trimmer > trimmer wiper to remaining resistor pad > leave other side (outer) trimmer leg unco
2012-05-26 by sasami@hotkey.net.au
>I've sorted it. I was using a 9V battery with a 100K resistor for my voltage source. > >I checked some old EM postings and found what i was doing wrong. > >Was taking DMM readings from the pot legs not the 1V/Oct input jack so i got voltage drop. > >All seems good now. > >Live
2012-05-26 by Stephen Richards
Would i wire it : resistor > outer leg of trimmer > trimmer wiper to remaining resistor pad > leave other side (outer) trimmer leg unconnected ? ________________________________ From: " sasami@... " sasami@... > To: cgs_synth@yahoogroups.com Sent: Saturday, May 26, 2012 4:13 PM S
2012-05-26 by sasami@hotkey.net.au
Yes, the 1k5 resistor connected to the 82k connected to pad E is the correct resistor to be messing around with. Ken >Hi Ken > >It's TCB day on the BOCGS panel... > >I was about to do the mod mentioned here : > > http://www.muffwiggler.com/forum/viewtopic.php?p=495151&highlig
2012-05-26 by Stephen Richards
Hi Ken It's TCB day on the BOCGS panel... I was about to do the mod mentioned here : http://www.muffwiggler.com/forum/viewtopic.php?p=495151&highlight=#495151 For improving 1V/ Oct tracking. When i looked at the schematic and then the PCB overlay it seems the 1.8K in the sche
2012-05-26 by Stephen Richards
I've sorted it. I was using a 9V battery with a 100K resistor for my voltage source. I checked some old EM postings and found what i was doing wrong. Was taking DMM readings from the pot legs not the 1V/Oct input jack so i got voltage drop. All seems good now. Live and learn... _
2012-05-26 by Stephen Richards
-14.91 on pin 4 , 8.38 on pin 7 on IC1 (TL072) i had no trouble getting both VCO's to 0V on IC1 pin 7 when doing the ZERO trimming. what is next ? ________________________________ From: " sasami@... " sasami@... > To: cgs_synth@yahoogroups.com Sent: Saturday, May 26, 2012 1:24 PM
2012-05-26 by sasami@hotkey.net.au
Compare voltages with the one that is working to find out where the problem is. Check that the op-amps are getting power to both of their power pins. If the voltages at pin 7 of IC1 can be adjuststed to be more-or less the same between the working and non-working (irrrespective o
2012-05-26 by Stephen Richards
Hi Ken I've moved on to the SPAN trimmer. One of the VCO's is adjusting fine with 1V input on the 1V/Oct input. Exactly an octave when CV removed. Under the same input conditions , the second VCO is not adjusting beyond one semitone short of a full octave ; no matter what i do wi
2012-05-26 by Stephen Richards
Great , thanks Ken. ________________________________ From: " sasami@... " sasami@... > To: cgs_synth@yahoogroups.com Sent: Saturday, May 26, 2012 11:57 AM Subject: Re: [cgs_synth] CGS48 VCO Calibration >I'm calibrating some CGS48 VCO's and i need to know what position to have the