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 Forum index » DIY Hardware and Software » Ken Stone designs - CGS
Getting started building CGS modules [Build Thread]
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haebbmaster



Joined: Aug 27, 2016
Posts: 30
Location: Windenreute, Germany

PostPosted: Sun Jan 14, 2018 12:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hubaswift wrote:
Maybe a general purpose PNP will do.

yes, BC557 or something like that

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Hubaswift



Joined: Jul 06, 2016
Posts: 65
Location: Canada

PostPosted: Fri Jan 19, 2018 8:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for the info haebbmaster, hopefully the BC557 will also suitable as a noise transistor for the Serge Noise module.

Here's a picture of some of the pcbs that I've populated so far. There are still a few missing parts since not all of my part orders have arrived.


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AlanP



Joined: Mar 11, 2014
Posts: 499
Location: New Zealand
Audio files: 31

PostPosted: Fri Jan 19, 2018 11:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

Huba, are those IC sockets dual wipe?

Because they look suspiciously like singlewipe.
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Hubaswift



Joined: Jul 06, 2016
Posts: 65
Location: Canada

PostPosted: Sat Jan 20, 2018 12:43 am    Post subject: Reply with quote  Mark this post and the followings unread

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: 30
Location: Windenreute, Germany

PostPosted: Sat Jan 20, 2018 12:58 am    Post subject: Reply with quote  Mark this post and the followings unread

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

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Hubaswift



Joined: Jul 06, 2016
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PostPosted: Sat Jan 20, 2018 1:04 am    Post subject: Reply with quote  Mark this post and the followings unread

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
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Location: Windenreute, Germany

PostPosted: Sat Jan 20, 2018 4:05 am    Post subject: Reply with quote  Mark this post and the followings unread

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.

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Hubaswift



Joined: Jul 06, 2016
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Location: Canada

PostPosted: Sat Jan 20, 2018 9:20 am    Post subject: Reply with quote  Mark this post and the followings unread

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: 65
Location: Canada

PostPosted: Sat Jan 20, 2018 10:16 am    Post subject: Reply with quote  Mark this post and the followings unread

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
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PostPosted: Mon Jan 29, 2018 10:36 am    Post subject: Reply with quote  Mark this post and the followings unread

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 love


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Ayab



Joined: Oct 27, 2015
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Location: London, UK

PostPosted: Mon Jan 29, 2018 4:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

Looking good. Have not forgotten transistors, should arrive soon.
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Hubaswift



Joined: Jul 06, 2016
Posts: 65
Location: Canada

PostPosted: Mon Jan 29, 2018 5:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

Ayab wrote:
Looking good. Have not forgotten transistors, should arrive soon.
thumleft
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other_format



Joined: Jun 01, 2015
Posts: 1
Location: UK

PostPosted: Wed Feb 21, 2018 5:23 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for uploading these pcbs, I'm planning on having a go at the DUSG.

Just wondering if there's a reason the 100nF is not connected to -V trace on the left hand part of the circuit (from pin 3 of LF353) while it is connected on the other side? This isn't on the CGS schematic but I think it is connected on the Ken Stone pcb?


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Hubaswift



Joined: Jul 06, 2016
Posts: 65
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PostPosted: Wed Feb 21, 2018 6:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

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: 65
Location: Canada

PostPosted: Sat Apr 21, 2018 9:19 am    Post subject: Reply with quote  Mark this post and the followings unread

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
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PostPosted: Sun Apr 22, 2018 3:51 am    Post subject: Reply with quote  Mark this post and the followings unread

that looks great Razz
do you have a spaceship to go with it ?

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Hubaswift



Joined: Jul 06, 2016
Posts: 65
Location: Canada

PostPosted: Sun Apr 22, 2018 9:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

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 Laughing You wouldn't see me again for a month!

I need to stop daydreaming...
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Hubaswift



Joined: Jul 06, 2016
Posts: 65
Location: Canada

PostPosted: Fri Jun 22, 2018 1:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quick update:
No, I haven't forgotten about this project, there have just been a few hiccups. I've been meaning to build a nice enclosure for this project for some time, but part-way in I realized that my planer wasn't planing the wood evenly. One side of the board would be slightly thicker than the other. Just recently I dug up a smaller portable Makita planer and have been using that. It's been working much better. Next, I need to get access to either a router or a router table in order to cut perfect 45-degree angles into the sides of each board. I cut the pieces from the board in such a way so that the grain will perfectly match up all the way around the box. I've attached a picture below portraying what I mean by 45-degree joint.

One other little setback is that I am unimpressed by the quality of the banana jack sockets that I got. If anybody has a recommendation for really solid, good quality (and good lookin') banana jack sockets, I'd love to hear it as I am planning on replacing all of the ones I originally got for the project.

One other thing I'm wondering about is if a switch-mode power supply would cause problems for CGS modules. I'd prefer to use a SMPS in order to obtain a lower profile on the case, but if it would degrade the sound significantly, I don't suppose it'd be worth it. My biggest worry about the SMPS is that I have a spring reverb in the case that would have to be quite close to it.


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