Month: December 2018

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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Nonlinear Circuits Vactrol PiLL Eurorack DIY

Time Lapse Build: Nonlinear Circuits Vactrol PiLL (NLC Vac PLL)

Violent Behavior PCB

In this build, we take on the Nonlinear Circuits (NLC) Vactrol PiLL module. While the build itself wasn’t a difficult one, it did take some patience when it came to soldering the LED after mounting the panel. With most of the components already mounted, we recommend you use a very fine time on your soldering iron to be able to get to the LED solder points.

Also, make sure you don’t have a lot of coffee or caffeine in your system when it comes to building this module… save that for when you are done!


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