Buchla 100 clones: 158, 180, 140, 156, 106, etc. DEMOS

From circuitbending to homebrew stompboxes & synths, keep the DIY spirit alive!

Moderators: Kent, Joe., analogdigital, infradead, lisa, parasitk, plord, sduck

Post Reply
User avatar
edwinm
Common Wiggler
Posts: 236
Joined: Mon Aug 05, 2013 4:31 pm
Location: London

Post by edwinm » Sun Oct 21, 2018 5:52 am

Panel and PCB for me, silver or white. Not keen on black Buchla, just seems wrong somehow

User avatar
lasesentaysiete
Super Deluxe Wiggler
Posts: 1438
Joined: Thu Feb 18, 2016 5:23 am
Location: Barcelona

Post by lasesentaysiete » Sun Oct 21, 2018 6:17 am

Here is a little cross modulation patch using only the 158a.


https://soundcloud.com/lasesentaysiete/158a-fm

User avatar
Leverkusen
Super Deluxe Wiggler
Posts: 2120
Joined: Mon Jul 29, 2013 2:26 am
Location: Suhlendorf

Post by Leverkusen » Mon Oct 22, 2018 2:33 am

Wow, two Buchla 100 DIY options are coming at at the same time! I hope, both of them will evolve well, especially since this one is Europe based! Also the PCB prices sound fair to me.

Regarding the panels, I might purchase PCB/panel combos or do my own panels. It depends a bit on the relationship between price of the panel and personal laziness at that point in time. Generally I tend more to the comfortable side. But I would prefer white panels then.

An important criterion for me to dive into this would be the trust in long term availability and the opportunity to build up a system over time.

:sb:

User avatar
lasesentaysiete
Super Deluxe Wiggler
Posts: 1438
Joined: Thu Feb 18, 2016 5:23 am
Location: Barcelona

Post by lasesentaysiete » Mon Oct 22, 2018 2:43 am

Leverkusen
two Buchla 100 DIY options are coming at at the same time! I hope, both of them will evolve well, especially since this one is Europe based! Also the PCB prices sound fair to me.
Yes, the plan is to keep these available long term, and also to provide a reliable and dependable source of pcbs (i.e. shipping, restocking, etc. all done at reasonable rates).
Regarding the panels, I might purchase PCB/panel combos or do my own panels. It depends a bit on the relationship between price of the panel and personal laziness at that point in time. Generally I tend more to the comfortable side. But I would prefer white panels then.
The panel situation is so far undecided. I can say that the white panel I had made for the 158a (photos soon :)) cost just under 50€. For me, the goal in offering a panel/pcb combo would be to keep the cost down as much as possible. It is easier, too, when purchasing.

User avatar
fluxmonkey
Super Deluxe Wiggler
Posts: 1818
Joined: Sat Oct 18, 2008 10:05 pm
Contact:

Re: Buchla 100 pcbs

Post by fluxmonkey » Mon Oct 22, 2018 9:16 am

you could zip the individual FPD files, if your host allows zip...
EDIT: Panel files are available via Dropbox.
I am not yet sure how I will go about sharing the panel files. My web host does not allow .fpd files to be linked to, so if anyone has any suggestions, please. Ideally, I would just leave the panel files up for anyone to use.
www.fluxmonkey.com

BUILDER FOR HIRE - kits or custom, email me with your needs

User avatar
fluxmonkey
Super Deluxe Wiggler
Posts: 1818
Joined: Sat Oct 18, 2008 10:05 pm
Contact:

Post by fluxmonkey » Mon Oct 22, 2018 9:32 am

no need to wait for the Ringmod, Noise, or BPF PCBs, since i've had them on offer for a couple of years: http://www.fluxmonkey.com/fluxmerch_buchla.htm
www.fluxmonkey.com

BUILDER FOR HIRE - kits or custom, email me with your needs

User avatar
lasesentaysiete
Super Deluxe Wiggler
Posts: 1438
Joined: Thu Feb 18, 2016 5:23 am
Location: Barcelona

Post by lasesentaysiete » Mon Oct 22, 2018 10:41 am

you could zip the individual FPD files, if your host allows zip...
It does not seem to offer .zip files, either :despair:

User avatar
lasesentaysiete
Super Deluxe Wiggler
Posts: 1438
Joined: Thu Feb 18, 2016 5:23 am
Location: Barcelona

Post by lasesentaysiete » Tue Oct 23, 2018 2:09 am

Just a note:

While I have been able to "reverse engineer" the layouts and values for a few models whose schematics are not widely available, not having direct access to original modules limits me quite a bit.

Any help with photos or schematics heretofore unknown to me is greatly appreciated. Modules like 196, 195, 130, 114. Otherwise, I have got it pretty much covered.

User avatar
lasesentaysiete
Super Deluxe Wiggler
Posts: 1438
Joined: Thu Feb 18, 2016 5:23 am
Location: Barcelona

Post by lasesentaysiete » Tue Oct 23, 2018 10:29 am

I finished the 192 layout today. I will be able to have this ready sooner than I originally thought :)

FYI, all layouts allow for the use of carbon composition resistors, in case the builder so chooses.

Image

User avatar
luchog
Crazy Pony
Posts: 828
Joined: Sat Nov 21, 2015 2:57 pm
Location: The Emerald City

Post by luchog » Tue Oct 23, 2018 1:13 pm

lasesentaysiete wrote:The panel situation is so far undecided. I can say that the white panel I had made for the 158a (photos soon :)) cost just under 50€. For me, the goal in offering a panel/pcb combo would be to keep the cost down as much as possible. It is easier, too, when purchasing.
I would be very happy with a PCB/Panel combo, rather than just the PCB.

My personal preference on panel colour would be, in order, white, red, or silver; but I'd be perfectly happy with any of those, or even black.

User avatar
lasesentaysiete
Super Deluxe Wiggler
Posts: 1438
Joined: Thu Feb 18, 2016 5:23 am
Location: Barcelona

Post by lasesentaysiete » Tue Oct 23, 2018 2:10 pm

luchog wrote: My personal preference on panel colour would be, in order, white, red, or silver; but I'd be perfectly happy with any of those, or even black.
I prefer white, too. There may end up be both white and silver available in the end. Red almost certainly will not make the cut, though :)

But, the panel files will be there for those who want to have a go at it themselves.

User avatar
Leverkusen
Super Deluxe Wiggler
Posts: 2120
Joined: Mon Jul 29, 2013 2:26 am
Location: Suhlendorf

Post by Leverkusen » Tue Oct 23, 2018 2:11 pm

If I got it right and a panel/PCB combo would be around 100,- I would be happy with the panel option. If non-white panels get more votes I would probably make my own panels at home and just go for PCBs. On the long run I can see me ordering 2 - 4 PCBs per quarter of the year. Oh, I really love the idea of building 100 system! :spin:

User avatar
lasesentaysiete
Super Deluxe Wiggler
Posts: 1438
Joined: Thu Feb 18, 2016 5:23 am
Location: Barcelona

Post by lasesentaysiete » Tue Oct 23, 2018 2:17 pm

Leverkusen wrote:If I got it right and a panel/PCB combo would be around 100,-
I will not speak for the panel manufacturers, but I would guess that to be a good estimate. The white panel I ordered from Schaeffer cost 50€.

djs
Super Deluxe Wiggler
Posts: 1074
Joined: Wed Sep 01, 2010 8:36 am
Location: South Beloit, IL

Post by djs » Tue Oct 23, 2018 3:37 pm

lasesentaysiete wrote:I finished the 192 layout today.
Not familiar with the 192 circuit- are those vactrols, or separate LED/ photoresistors? If it's the second, do you leave them open, or create some sort of tube between them?
"Noise is what the Earth is made of" - David Bowie

User avatar
lasesentaysiete
Super Deluxe Wiggler
Posts: 1438
Joined: Thu Feb 18, 2016 5:23 am
Location: Barcelona

Post by lasesentaysiete » Tue Oct 23, 2018 3:40 pm

djs wrote:
Not familiar with the 192 circuit- are those vactrols, or separate LED/ photoresistors? If it's the second, do you leave them open, or create some sort of tube between them?
Its like a proto vactrol made using a lamp and a photo resistor. The Buchla modules encased the 2 in a sort of heatshrink. The decay is much slower than a vactrol, though. I will make demos as soon as possible. It is a seldom heard filter.

Here is an original 192. You can see the 4 black tubes containing the lamp+photo resistor pairs. On the pcb render I posted above, L1 is he lamp and PR1 is the photo resistor (same goes for L2 + PR2).

Image

User avatar
lasesentaysiete
Super Deluxe Wiggler
Posts: 1438
Joined: Thu Feb 18, 2016 5:23 am
Location: Barcelona

Post by lasesentaysiete » Sat Oct 27, 2018 5:44 am

For anyone looking for a power supply solution for a 100 series only system, I plan on using the following:

https://www.mouser.es/ProductDetail/Int ... ahIcSZA%3d

I will probably make some type of power distribution pcb to facilitate installation of modules. Nothing too special, though.

Anybody else looking to do a 100 only system in need of some type of power distribution setup? It would not use EDAC connectors.

KSS
Veteran Wiggler
Posts: 660
Joined: Mon Jan 25, 2016 7:28 am

Post by KSS » Sat Oct 27, 2018 6:53 pm

Definitely prefer separate PCB. With panel optional.

User avatar
lasesentaysiete
Super Deluxe Wiggler
Posts: 1438
Joined: Thu Feb 18, 2016 5:23 am
Location: Barcelona

Post by lasesentaysiete » Sun Oct 28, 2018 6:53 am

lasesentaysiete wrote: I will probably make some type of power distribution pcb to facilitate installation of modules. Nothing too special, though.
Something like this could work--enough for a full cabinet (15 modules). It is laid out for 2-pin mta-156 connectors, and the tracks are 2mm thickness. Power entry to the distro board is via spade connectors.

Image

djs
Super Deluxe Wiggler
Posts: 1074
Joined: Wed Sep 01, 2010 8:36 am
Location: South Beloit, IL

Post by djs » Sun Oct 28, 2018 9:27 am

Any general thoughts (Mike Peake?) about the 106? I have a faux 106 made up with CGS04 mixer pcbs.. What does the 106 circuit do that a standard mixer doesn't do? I'm guessing it's all discrete, but is there some mojo that I don't know about?
"Noise is what the Earth is made of" - David Bowie

User avatar
lasesentaysiete
Super Deluxe Wiggler
Posts: 1438
Joined: Thu Feb 18, 2016 5:23 am
Location: Barcelona

Post by lasesentaysiete » Sun Oct 28, 2018 9:43 am

djs
I have not compared the 2 directly, but my guess is that the CGS04 would not sound the same because it has greater headroom. The 106 works within the 100 series line-level range to produce a slight drive when pushed. Buchla audio levels are lower than most other modular formats.

Also, the 106 is AC coupled and the CGS04 is not.

User avatar
vladosh
Learning to Wiggle
Posts: 33
Joined: Sun Sep 08, 2013 5:54 am
Contact:

Post by vladosh » Sun Oct 28, 2018 12:11 pm

i made a little demo of the 192 VCF ,built it from Mike Peake layout and included the resonance mod suggested by someone https://soundcloud.com/r25990127/buchla-400-vcf

User avatar
lasesentaysiete
Super Deluxe Wiggler
Posts: 1438
Joined: Thu Feb 18, 2016 5:23 am
Location: Barcelona

Post by lasesentaysiete » Sun Oct 28, 2018 12:53 pm

vladosh
nice demo. The filter sounds a little sluggish. I like it :) I did not know about the resonance mod. Any further info or opinion on it?

User avatar
vladosh
Learning to Wiggle
Posts: 33
Joined: Sun Sep 08, 2013 5:54 am
Contact:

Post by vladosh » Sun Oct 28, 2018 1:02 pm

i think you can implement that resonance mod if you haven't and without pot just to make it sound fatter i think the schematics can be found at emcloned ,i like the filter too ,have not tried the 194 yet so looking forward to that :hyper:

User avatar
lasesentaysiete
Super Deluxe Wiggler
Posts: 1438
Joined: Thu Feb 18, 2016 5:23 am
Location: Barcelona

Post by lasesentaysiete » Sun Oct 28, 2018 1:07 pm

Thanks! I found this:

Image

Seems simple enough. I will try it and if it makes sense, I may add the option to the pcb layout.

User avatar
snaper
Ultra Wiggler
Posts: 975
Joined: Mon Feb 10, 2014 12:29 am
Location: Magyarország

Post by snaper » Sun Oct 28, 2018 1:44 pm

Bookmarked your site, surely I'm in for a 158 and for the clock generator!

Post Reply

Return to “Music Tech DIY”