Colorsound Octivider

5/8/2014

Another Octave Down, very different from the Synthbox. Cleaner and bassier octave.
Modded by me for true bypass. Have a look at my completed build here.

This circuit is a bit below unity gain, but John Kallas did his own version of my layout with an added boost daughterboard. Check out his layout here.

8 Comments

12/20/2018 04:28:02 pm

Hello. Do you have the schematic of this mod?

Fredrik Lyxzen link

12/23/2018 03:43:51 am

Sorry, I don't have the schematic for this mod any more

12/23/2018 10:50:07 am

Thanks. I will try to build one.

Gabriel

9/5/2019 08:32:39 pm

Hey, I've buit this a while ago and it was working like a charm, thanks! The only problem was I kept having trouble with transistors popping out of sockets transporting it between gigs. So today I decided to solder them in, and to my dismay the effect stopped working. All I get now is that the blend acts as a tone knob and low-passes stuff at high wiper positions.

I've checked for bridging between the rails but all of that seems fine. Do you have any idea what it could be?

Gabriel

9/5/2019 08:46:06 pm

A little more information regarding this. I checked the BC and BE forward voltages for all BJTs, which all gave a nice .7V. The GS and GD voltages for the FETs were also .7V, but the DS voltages were quite different. Q1 showed .04V while Q2 showed .35V.

Also, the sensitivity pot does absolutely nothing now.

Gabriel

9/6/2019 09:40:08 am

Oops, all I had was that the rail H was broken between Q6 and the jumper. All is fine now.

Fredrik Lyxzén link

9/6/2019 10:15:54 am

Hi Gabriel,

I was just about to reply when I saw your new comment. Good to hear that you found the issue. :)

Cheers / Fredrik

Benoit Meulle-Stef

8/18/2020 10:16:02 am

Is the direct sound and octave sound supposed to fuzz or clean sound?

Cheers

Benoit

Colorsound Octivider

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