Tag: oscillator

Erica Synths Polivoks VCO – DIY Build

Erica Synths Polivoks VCO - DIY Build

ES VCO - Boards 1

Erica Synths have been around for awhile and while most of their previous offerings in the modular world were fully built modules, they do have some DIY kits. The Erica Synths Polivoks VCO or Voltage Controlled Oscillator is one of those modules. 

The core of this VCO is borrowed from the famous Russian synth Polivoks VCO, and original matched transistor IC is the same of that was used in Polivoks. These two things give this VCO a very well rounded and beefy sound. (We liked it so much we have 2 of these). 

The gang over at Synthrotek have made these kits available in all their entirety. They have several options available to purchase (links below), including a fully assembled module if you do not feel like building anything. We opted for the full DIY Kit as usual and began warming up or irons!


Analog Lab.Swiss Dual Sub101A – DIY Build

Analog Lab.Swiss Dual Sub101A - DIY Build

Here at fiN Studios, we are continuously looking for new and exciting modules, synths or pedals to build. Not only do we utilize them in our own racks, we enjoy helping promote other artists or instrument designers. 

One of our most recent finds is the Analog-Lab.Swiss Sub 101A Duo which is a dual sub-oscillator eurorack module. There is even have a single version of the 101A if you only wanted one. We opted for the Dual Sub101A and have to admit, we are glad we did. 

What is the Sub101A?

The Sub101A is a 6HP Eurorack Module who’s circuit adds a square wave sub-oscillator to your rack. In layman’s terms, it adds more bass or low end to the output of anything going into it. This is accomplished by tracking an oscillator signal from a VCO and then generating a square wave that is -1 or -2 octaves below that. Needless to say, it goes low!!

You can also mix between the 2 sub-octaves which can give the output a sound similar to the famous Roland SH-101 pulse.

Let’s get on with the build!!

Sub101A Kit

4MS Atoner Eurorack Module DIY Build

4MS Atoner Eurorack Module - DIY Build

For our latest eurorack build, we take on the mystical Atoner by 4MS Company. This little beast is only available as a kit that can either be ordered from 4MS directly or through other DIY module shops. We picked up ours from the gang out at SynthCube and dove right into the build.

As for the build itself, it was relatively straight forward thanks to the extensive BOM and assembly guide that were provided with the 4MS Atoner kit. Where the build can wonder into the intermediate build category is with the tight ground wiring and navigation of confined spaces (see photos). With that being said, make sure your iron is clean and primed correctly as you don’t want to go into this build with a dirty iron or a dull tip. As for aesthetics, we loved the graphic design on the panel but didn’t care for the knobs that were supplied with the kit. They looked like generic cheap knock off Davies clones, so we chose our own orange Davies Clones to give our 4MS Atoner a little more flavor.


Time Lapse Build: Reverse Landfill – NOISE! Oscillator

Modular Madness: Reverse Landfill - NOISE! Oscillator Time Lapse

For today’s time lapse build we took on the Reverse Landfill NOISE! Oscillator.  This was a fun little module to build and only took about 2-3 hours total . . . but it does require some extra solid core wire to finish the build.  We didn’t have any sitting around so we had to salvage what we could from another donor project and once we got the NOISE soldered up, we were impressed how the build was relatively simple. 

Let us know if you have any questions about the build or if you need more detailed photos of the completed module to help your build. 

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~ f i N