Tag: DIY

Fonitronik Ps3100 Triple Vactrol Resonator – Time Lapse Build

Fonitronik Ps3100 Triple Vactrol Resonator - Time Lapse Build

In our latest build we take on the Fonitronik Ps3100 Triple Vactrol Resonator – A clone of the lovely triple resonator from the rare 1977 Korg Ps3100 polyphonic modular.

What we have here is basically a module combining three bandpass filters (vactrol based filter core from the PS3100) with a simple resettable LFO and some clever CV and signal routing.  The LFO is normalized to the common CV input, which is normalized to the 3 single CV inputs. the 3rd CV channel can be inverted.

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The build itself was a timely one and it took great patience and a skillful hand to complete.  As they stated in the description “Not for the beginner”, remained true.  We don’t recommend this kit to anyone just getting started in the Eurorack DIY realm as it can easily be overwhelming and a simple soldering mistake can cause feelings of anxiety and let down. 

Now, if you successfully complete the module as we did, the module itself can be a prize possession in your rack.  The triple vactrols do exactly what they say they will do and resonate some of the warmest sounds from the 1970’s.  Hence, another reason why this module is special.  The warmth of the analog audio is something that is rare to find in today’s Eurorack systems.  

If you are down for a challenge and are needing some much provided warmth in your rack, this might just be the perfect module for you!

Fonitronik Ps3100 Triple Vactrol Resonator Specifications:

Module Description:

– 3 single audio inputs + a common audio input,

– 3 single audio outputs + sum audio output

– 3 single CV inputs with attenuators + a common CV input

– LFO output, LFO reset input

Module Dimensions:

Height – 3U

Width – 20HP

If you have comments or questions about the Fonitronik Ps3100 Triple Vactrol Resonator, please feel free to contact us!


Modular Building Weekend: Radio Music Machine

We will be taking on the Music Thing: Radio Music 4hp Virtual Radio module this week/weekend and will be filming all the goodness in a time lapse.  This is a tricky little module as its piggybacked by a Teensy module, which can be programmed separately. This module is where the firmware is stored and flashed as one is able to alter the firmware to ones liking.  I am sure we will start of with the stock firmware and eventually flash the Teensy in the near future to get even more out of the module.

Another cool thing about this module is that the onboard SD card can be formatted with various samples to ones liking and the settings.txt file can be manually edited to turn on and off various settings.  

We are excited to build this module, as we have had in our build box since Christmas 2017.  We purchased this DIY kit from Thonk UK alongside our Turing Machine Module. 

Stay tuned to see how the build comes along!

Have any suggestions on our next build?  Drop us a line on our Contact Page and we will see what we can do!

Make sure to follow us on Instagram @finstudios and also Facebook!

~ f i N 


Studio Addition: 3D Printer Build and Upgrades

We took a leap and decided to purchase a 3D printer for the studio to help design some new products that we will feature in our store.  Since this is a DIY build and kit, it will take a few days to get everything up and running.  Parts have been ordered and assembly has started.  We look forward to sharing some new designs with you!

Updates to follow 

~ f i N


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