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haebbmaster
Joined: Aug 27, 2016 Posts: 40 Location: Windenreute, Germany
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Posted: Sun Jan 14, 2018 12:14 pm Post subject:
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Hubaswift wrote: | Maybe a general purpose PNP will do. |
yes, BC557 or something like that _________________ Make modular synthesizers great again!
Modular Synthesizer DIY blog: http://modular.haebbmaster.de |
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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AlanP
Joined: Mar 11, 2014 Posts: 746 Location: New Zealand
Audio files: 41
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Posted: Fri Jan 19, 2018 11:59 pm Post subject:
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Huba, are those IC sockets dual wipe?
Because they look suspiciously like singlewipe. |
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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Posted: Sat Jan 20, 2018 12:43 am Post subject:
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I'm not very familiar with dualwipe vs singlewipe. What I can say is that some of the sockets are machined (such as the 8 pin one in the pic) and some of the other ones (such as the all black sockets) were salvaged. Is there a drastic importance between single and dualwipe socket usage? |
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haebbmaster
Joined: Aug 27, 2016 Posts: 40 Location: Windenreute, Germany
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Posted: Sat Jan 20, 2018 12:58 am Post subject:
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It‘s just how good the contacts are. Dual are better than single and machined are best. I don‘t use salvaged parts. Contacts may be bad.
Read this on contacts
http://arcadecontrols.com/BBBB/ic.html _________________ Make modular synthesizers great again!
Modular Synthesizer DIY blog: http://modular.haebbmaster.de |
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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Posted: Sat Jan 20, 2018 1:04 am Post subject:
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Okay, thanks for the heads up. Tomorrow I'll check the resistance between the pins on the ics, and where the sockets are soldered onto the board to check the continuity. If I notice any problems, I have some machine sockets I can replace the singlewipe ics with. |
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haebbmaster
Joined: Aug 27, 2016 Posts: 40 Location: Windenreute, Germany
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Posted: Sat Jan 20, 2018 4:05 am Post subject:
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The problem is not the problem you have now. The problem will appear in a few years.
Dual wipe have double size contact surfaces than single wipe. So you will have less problems with corrosion. _________________ Make modular synthesizers great again!
Modular Synthesizer DIY blog: http://modular.haebbmaster.de |
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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Posted: Sat Jan 20, 2018 9:20 am Post subject:
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Dang, I see. I don't know if I have enough machined 14 pin sockets lying around to replace all of them, but I'll replace all the ones I can for now. |
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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Posted: Sat Jan 20, 2018 10:16 am Post subject:
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I took out one of the socket legs to have a look at it. It looks to me like it may be dualwipe. Here are some photos:
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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Posted: Mon Jan 29, 2018 10:36 am Post subject:
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Julian, the guy who I got to make the panel, is just about done making it! Here are some pictures of the panel he sent me. It looks amazing
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Ayab
Joined: Oct 27, 2015 Posts: 180 Location: London, UK
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Posted: Mon Jan 29, 2018 4:51 pm Post subject:
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Looking good. Have not forgotten transistors, should arrive soon. |
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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Posted: Mon Jan 29, 2018 5:49 pm Post subject:
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Ayab wrote: | Looking good. Have not forgotten transistors, should arrive soon. | |
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other_format
Joined: Jun 01, 2015 Posts: 1 Location: UK
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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Posted: Wed Feb 21, 2018 6:49 pm Post subject:
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Just another mistake by me... I'll fix it and update the attachment on that post. |
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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Posted: Sat Apr 21, 2018 9:19 am Post subject:
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I've started mounting all the pots and jacks on the front panel. I've decided to hold off on buying the buchla style knobs for now simply because they are 4x as expensive as your average knob. So, for now I have some different davies clones and mxr knobs on there, and they actually look pretty nice! They'll definitely do for now.
The only things I've left to do are:
-finish mounting all the front panel components
-put a few last parts on the pcbs.
-build a wood case for it
-install the power supply, and pcbs into the case, and wire everything. This will take a while
Building the wood case will probably end up being the biggest holdup. Although I have access to my Fathers carpentry shop, where he has tools such as planers, table saws, chop saw, etc. Since everything is used more for crude construction rather than fine woodworking, most of it is out of calibration in one way or another. The planer's blades need to be sharpened, The fence on the table saw needs to be fixed, and lots of other little things need to be taken care of before I'm comfortable throwing some nice hardwood through the machines.
Here's some pics:
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PHOBoS
Joined: Jan 14, 2010 Posts: 5591 Location: Moon Base
Audio files: 705
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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Posted: Sun Apr 22, 2018 9:15 pm Post subject:
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Thanks Phobos! Building a "spaceship" would be such a fun project. Imagine a giant cockpit fitted with modular synths, back-lit front panels, a surround sound sound audio system w/ subs, and instead of a window, a giant curved screen fitted for video synthesis You wouldn't see me again for a month!
I need to stop daydreaming... |
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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The Bad Producer
Joined: Mar 08, 2009 Posts: 282 Location: The Manhole
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Posted: Tue Aug 21, 2018 2:15 am Post subject:
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Bit late to the party! But I use these:
WHITE 530-108-0901-1
RED 530-108-0902-1
BLUE 530-108-0910-1
BLACK 530-108-0903-1
GREEN 530-108-0904-1
GREY 530-108-0913-1
BROWN 530-108-0908-1
VIOLET 530-108-0912-1
YELLOW 530-108-0907-1
ORANGE 530-108-0906-1
Emerson Johnson banana jacks, the best IMO... Note those are Mouser codes, but you can also get them from Farnell (which may be cheaper in some instances)...
Regading SMPS power, I've used a few types with my CGS builds and not had any issues, though I haven't tried next to a spring. FWIW the 73-75 panels from THC use an SMPS too...
Great build BTW! _________________ http://loudestwarning.tumblr.com/ |
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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Posted: Wed Aug 22, 2018 6:51 pm Post subject:
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Emerson jacks are the exact ones I ended up getting. They’re definitely much nicer than the previous ones I had. It’s good to know that a SMPS doesn’t cause any issues synth wise. I really appreciate the info. If worst comes to worst with the spring reverb, I’ll try to find some sort of electrostatic insulation. |
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The Bad Producer
Joined: Mar 08, 2009 Posts: 282 Location: The Manhole
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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Posted: Thu Aug 23, 2018 5:06 pm Post subject:
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Thanks for the link! I think I used a similar Meanwell 12v SMPS to replace the power supply in a Korg T1 a while ago and I was quite impressed for the price. |
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Schläfer
Joined: Aug 17, 2017 Posts: 18 Location: Berlin
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Posted: Wed Nov 21, 2018 7:02 am Post subject:
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Hello !
I'm currently running a similar DIY CGS project and having trouble with the CGS75 VCS.
Anybody had any chance with it?
Here is the layout, it's totally possible that i forgot some trace or did some mistake.
I read after some research that it was some problem with the layout of the REV 0 board that was corrected in the production one, but i'm unable to find more precise informations about it.
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Hubaswift
Joined: Jul 06, 2016 Posts: 91 Location: Canada
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Posted: Wed Nov 21, 2018 7:51 am Post subject:
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On the VCS page is mentioned an incorrect resistor value on Rev 0 boards
"On the first run of these PCBs (REV0.0 red boards) the specified 220k resistor connected to the emitters of the four transistors should be 8k2. On the VER1.0 boards, the 22k resistor in this location should be 8k2." Is this possibly the problem that was being referred to?
Are you sure it's a layout fault? There's always the possibility of an etching fault, soldering short, faulty component, etc. It probably would be a good idea to also post a picture of the top/bottom of your board and post it. If I'm able to find a chunk of free time today I'll go over the Rev 0 layout and compare it to the schematic to see if there are any discrepancies.
Thanks for posting the Layout Schläfer! I'd love to see more of the DIY CGS project your working on. |
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Schläfer
Joined: Aug 17, 2017 Posts: 18 Location: Berlin
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