Erica Synths Polivoks Dual VCA II PCB Set
Erica Synths Polivoks Dual VCA II PCB Set

Erica Synths Polivoks Dual VCA II PCB Set

Your Price:$29.99
In Stock
Part Number:ES-VCA-PCB
Please note: this includes the PCB set only. No ICs or other parts are included. Please see the bill of materials link below to source the rest of the parts needed.
Erica Synths DIY Polivoks-inspired VCA is 35mm deep, skiff friendly, has solid mechanical construction and doesn’t require wiring.



  • Single or Dual VCA mode
  • CV level adjustment for each VCA
  • Summed audio output (lower signal gain, though)
  • Skiff-friendly design


The Polivoks VCA has distinctive architecture – two differential opamp (Russian ICs K118UD1B) based VCAs in series, each for LFO and ADSR control over signal amplitude independently. Control voltage to attenuation behavior of this VCA is nonlinear and not logarithmic. It is kept authentic to the response of original Polivoks. Most parts of the VCA have been improved to achieve compatibility with eurorack signal and CV standards, higher dynamic range, better reliability, lower noise, accept higher signal levels, keep consistent behaviour, self-tuning of two internal offsets and higher linearity, but the heart of it is kept the same. We also redesigned audio signal path, so that you can use it as two independent VCAs or two VCAs in series as in original Polivoks, plus summed signal output.

Technical specifications:

VCA gain1.2
CV level-10V…+10V
Attenuation@0V CV80dB
Panel width8HP
Module depth35mm
Power consumption24mA@+12V, 18mA@-12V

Download the bill of materials, assembly guide and schematic from the Github page.

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