Category: MyRack

This was one of my first filers. It’s based on the famous Korg MS 20 design. I believe it’s based on the late design by Korg. I’ve been looking into filter designs a lot lately and this one is really nice. A good description can be found on Kassutronics site: https://kassu2000.blogspot.com/2019/07/ks-20-filter.html

He based the filter on a design by René Schmitz. René did a lot of reverse engineering to find out how the filter in the Korg worked. Most of the MS20 filter design in eurorack are based of the schematics René posted. https://www.schmitzbits.de/ms20.html. There is a nice write up by Tim Stinchcombe about the korg filters. If your into some more background stories check out his website too https://www.timstinchcombe.co.uk/index.php?pge=korg

I enjoy this filter it can scream a lot. The only thing I didn’t like is the panel. I like to have had a black panel for this one but that doesn’t seem to be available. If anyone does know where to find a black panel for this please let me know. If you order this on Kassutronics site make sure to peel of the panel protector a lot of people have mailed him the text looks faded. The protector needs peeling off.

I do have a second one in my rack that is based of Kassutronics schematics and made by a good friend of mine. So there are a lot of MS 20 filters out there I think it might even be the most build filter in eurorack.

Difficulty to build: Medium, Good manual

It’s been awhile since I’ve build this one. I don’t use it that often in patches. I do need more effects in my rack so it’s kinda strange I don’t use this that much. I have to look it up if it still needs calibrating but the sound it makes doesn’t really get to me. Maybe I will update this post if I have played with it more or when i sold it. Maybe I need to change the led’s to diodes for more overdrive.

https://github.com/erica-synths/diy-eurorack

Difficulty to build: Hard (or medium if you are skilled). It has multiple pcb’s and not the best build manual.

This is one of the modules I always wanted to have. Just because I have read the book from Thomas Henry before I started on my DIY eurorack journey. This module is designed by Timo Rozendal based on the Thomas Henry design from his book. From the little contact I had with Timo he really seems a nice guy. This module can deliver anything from bassdrum’s to tom sound and anything in between.

https://soundcloud.com/timorozendal/demo-of-thomas-henry-bass-module

https://www.timorozendal.nl/

Difficulty to build: Easy to medium depending on your skill

These mixers I use a lot. I have a few of them all scattered in my rack. With two output they tend to be quite handy. These one I really like and use a lot. Building these is not that hard to do.

https://github.com/erica-synths/diy-eurorack

Difficulty to build: Easy

It’s a nice sounding filter. The build is not that difficult and can all be done on one pcb. It has a low pass and a bandpass. It’s not my favorite filter but it does the job it needs to do.

https://github.com/erica-synths/diy-eurorack

Difficulty to build: Medium/Easy

I build a few of these and what a buggers to build. Still one of them won’t operate as it should. The components are quite dense and prone to make mistakes. But when the do work it’s a nice ADSR. I would not recommend them just because of the poor layout of the pcb’s. I do have a few of them in my rack though.

https://github.com/erica-synths/diy-eurorack

Difficulty to build: Hard

I have used this output module a long time before I bought a Expert Sleepers ES-9. It’s still in my rack and I’m still using it some times. It routes all sound to my amp and speakers and sometimes my headphones. It was not a difficult module to build.

https://github.com/erica-synths/diy-eurorack

Difficulty to build: Medium, Easy

You can’t have enough VCA thay all said. Well this one is a dual VCA with a mixed output. The VCA it self I do like and use it a lot in my patches. This was one the the DIY version of Erica product I did like to build. The spacing of the components is fine one this one. I have four or five of them in my rack. Not a lot to say it’s a good VCA.

https://github.com/erica-synths/diy-eurorack

Difficulty to build: Medium