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Erica Synths ‘Polivoks VCA II’ – DIY Partial Kit


Dual Polivoks flavour VCA

Note: This is a partial kit – for complete kit go here

EU Price does not include EU VAT

In stock

SKU: PP_Erica_Polivoks_VCA-II_ParKit Categories: , , , , , , , ,


Note: This partial DIY kit contains the following parts only:

  • Polivoks VCA II PCB Set
  • Polivoks VCA II Eurorack Front Panel (8HP)
  • 2 x K188UD1 ICs
  • PCB Connectors

Erica Synths Knobs can be purchased here:

The Polivoks VCA II has a distinctive architecture – two differential opamp (Russian ICs K118UD1B) based VCAs in series for LFO and ADSR control over signal amplitude independently. The control voltage to attenuation behaviour of this VCA is nonlinear and not logarithmic – it is kept authentic to the original response of the Polivoks. The circuitry of the VCA have been improved to achieve: higher dynamic range, better reliability, lower noise, accept higher signal levels, keep consistent behaviour, self-tuning of two internal offsets, and higher linearity. The audio signal path has also been redesigned so that you can use it as two independent VCAs or two VCAs in series like the original Polivoks.


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

Polivoks VCA II Layout – Component Placement

Polivoks VCA II BOM – Bill Of Materials

Technical specifications:

VCA gain
CV level -10V…+10V
Attenuation@0V CV 80dB
Panel width 8HP
Module depth 35mm
Power consumption
24mA@+12V, 18mA@-12V

Additional information

Weight 0.066914 kg

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