Juno 106 Chorus Module for Eurorack

logicgate · Post by **logicgate** » Wed Apr 23, 2014 6:15 pm

This is another project that was in my backburner, I'm loosing hair already trying to make the best routing and make it fit nicely in a 10cmx10cm PCB:

In my latest attempt I was able to squeeze it in a 9.7cm x 11cm PCB, almost there!

I was thinking about using an attenuverter to control the output:

at noon it would be chorus I + II

FCCW chorus I

FCW chorus II

Gonna take a little while, though. I'm still waiting for parts, around here it takes fucking long to get stuff, and I'm gonna use almost all original components.

logicgate · Post by **logicgate** » Wed Apr 23, 2014 6:17 pm

The forum is very laggy today, I can't edit my post and the images are not showing....

horstronic · Post by **horstronic** » Wed Apr 23, 2014 6:31 pm

Very nice! Do you plan to do boards for this?

logicgate · Post by **logicgate** » Wed Apr 23, 2014 7:34 pm

horstronic wrote:Very nice! Do you plan to do boards for this?

Yes definetely.

Once it's done, and if there's enough interest, I'll offer a PCB run.

Cheers!

medbot · Post by **medbot** » Wed Apr 23, 2014 8:40 pm

Wow, that's a busy looking board

looking forward to seeing how this one turns out for sure.

lintfresh · Post by **lintfresh** » Wed Apr 23, 2014 9:08 pm

Cool!

clusterchord · Post by **clusterchord** » Wed Apr 23, 2014 9:54 pm

interested in this module...

if you can, add wet/dry control. many times, we just need a touch of chorus whilst retaining the full bandwidth of the source signal. its much more usable setup than just on or off.

also a 2-pos fixed HPF affecting whats fed to the chorus circuit, would be fantastic. for example 0/80/160Hz etc. it would make it much more versatile being usable for bass/low mid sounds, male vocals, things like that.. de facto a "bass chorus" setting of sorts.

just a thought. ..

Luka · Post by **Luka** » Wed Apr 23, 2014 10:06 pm

i tried to find decent price mn3009 when fixing my juno and struggled finding real ones. all the ebay ones were duds.

if you are designing this maybe redesign for a in-production bbd like cool audio clones

logicgate · Post by **logicgate** » Wed Apr 23, 2014 10:39 pm

@Luka

This guy sold 139 MN3009 already, has 0 negative feedback. If you check the positive feedback, all MN3009 buyers confirm it's the real deal

http://www.ebay.com/itm/150955355461

@clusterchord

The idea is nice, but there's no way I can fit ANYTHING else in the PCB

I believe it's easier to achieve what you want by feeding an already HPassed signal into it? For dry/wet, you can use a stackable to feed the original signal into a mixer and the copy to the chorus module and from chorus to mixer, and adjust to taste?

Jdavidk · Post by **Jdavidk** » Fri Jul 11, 2014 5:30 pm

Any updates on the boards? Am very interested in this.

logicgate · Post by **logicgate** » Fri Jul 11, 2014 6:15 pm

Jdavidk wrote:Any updates on the boards? Am very interested in this.

still cooking slowly.

I noticed that I can omit more parts from the original circuit that won't make any difference so, i think that the board will be a bit smaller.

Check Mate · Post by **Check Mate** » Sat Jul 12, 2014 4:44 pm

This is just what I've been hoping and waiting for. I'm definately interested and you can count me in.
Keep it up!

abelovesfun · Post by **abelovesfun** » Sun Jul 13, 2014 12:01 am

Me too. Does it add noise like the juno chorus?

LektroiD · Post by **LektroiD** » Sun Jul 13, 2014 3:45 am

I'd be in for one of these with a panel...

The dry/wet option would be a welcome addition too, if possible...

malnatim · Post by **malnatim** » Sun Jul 13, 2014 6:01 am

yes please!

livefreela · Post by **livefreela** » Sun Jul 13, 2014 6:19 am

i'd for sure be in for a pcb / panel set - i'd been giving some thought to trying to render out the gligli juno chorus circuit for some time, but my skills are dodgy at best, so this looks rad!

logicgate · Post by **logicgate** » Sun Jul 13, 2014 7:28 am

@abelovesfun

"Me too. Does it add noise like the juno chorus?"

It's quiet I think, didn't notice any noise that would impair the sound when I had it on breadboard, and I'm one of those guys that get very annoyed with hums, etc..
Isn't this "noise issue" something that is very random? Not all 106 are noisy, I believe there's something to do with the build or parts.

@LeKtroiD

Yes the wet/dry will def be there, there will be two outputs (chorus I and II), each with it's own wet/dry control.

Leonard de Leonard · Post by **Leonard de Leonard** » Sun Jul 13, 2014 9:46 am

"Yes the wet/dry will def be there, there will be two outputs (chorus I and II), each with it's own wet/dry control."
Sweet!

memorygardens · Post by **memorygardens** » Sun Jul 13, 2014 9:48 am

any way this would work for motm? i love my juno chorus

Isaiah · Post by **Isaiah** » Sun Jul 13, 2014 11:06 am

I'm interested in a PCB, please.
Any idea of the board dimensions yet?

abelovesfun · Post by **abelovesfun** » Sun Jul 13, 2014 12:59 pm

Ok cool. Maybe it's bad luck, but every juno I've touched (5 between 6s, 60s, 106's, alphas, and my current hs) gets noisy with the chorus. Maybe they just needed new caps. I'd love to buy a pcb! I'm motm so I'll have to figure out my own panel.

Suf-fuD · Post by **Suf-fuD** » Mon Jul 14, 2014 10:50 am

I'm also very interested in this....

technotron · Post by **technotron** » Thu Jul 17, 2014 7:23 am

[video][/video]

Sign me up for one!

Do you plan on making front panels as well?

minisystem · Post by **minisystem** » Thu Jul 17, 2014 8:39 am

Here's another Juno chorus clone:
http://gliglisynth.blogspot.fr/2014/05/ ... no-60.html

I was wondering what, if anything, needs to be done to make it work with 12V?

logicgate · Post by **logicgate** » Thu Jul 17, 2014 9:54 am

@technotron

no, I suck at panels!

@minisystem

Not much, really. All the ICs works with 12v, the only thing that needs to be done is to bring the signal level down before going into the circuit and then up again when exiting. Given that the MNs are somewhat sensitive I wouldn't feed them with a signal too hot.

MOD WIGGLER

MOD WIGGLER

Juno 106 Chorus Module for Eurorack

Juno 106 Chorus Module for Eurorack