DIY kits

DIY Polivoks VCA II

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Erica Synths DIY Polivoks-inspired VCA is 35mm deep, skiff friendly, has solid mechanical construction and doesn’t require wiring.

Features

 

  • 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

 

For those who purchasing partial kits know that sizes are:  
Small Knobs 19 mm 
Medium Knobs 24 mm 
Large Knobs 28 mm

Disclaimer: Please, if you have any questions on missing parts or similar issues, contact us within 1 month after receiving the kit!  

Erica Synths DIY Polivoks VCA on Modulargrid
 

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