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DIY Polivoks VCO II

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Outside EU: + local taxation (VAT / trade tax / import duties) is applicable in the country of delivery + shipping
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The core of the VCO is borrowed from the famous Russian synth Polivoks VCO and in exponential converter we use the original matched transistor IC that was used in Polivoks.

Features

 

  • Triangle, saw and pulse wave outputs
     
  • Manually adjustable and CV controlled pulse width
     
  • Great tracking across 8 octaves
     
  • Exponential FM input with attenuator
     
  • Synchronization input
     
  • Octave switch – 5 octaves
     
  • Skiff-friendly design

Kits supplied with 1x KR198NT1A. 

 

We have significantly updated schematics:

  1. Introduced +-10V regulators for greater stability of operation,
     
  2. Adjusted signal amplitudes to match requirements of contemporary modular synths and made all output signals available simultaneously,
     
  3. Redesigned CV inputs to accept positive CV signals,
     
  4. Introduced PWM circuit with manual and  voltage controlled pulse width,
     
  5. Introduced synchronization input, so you can sync the VCO to other VCOs.


 

Technical specifications:

Audio output amplitude10Vptp
Octave rangeC0 – C8
Panel width  12HP
Module depth35mm
Power consumption34mA@+12V, 36mA@-12V

 

Effective January 1 2021 Erica Synths will not provide technical support for DIY projects. As all Erica Synths DIY Kits are now sold out, we offer them as opensource build projects on Github. If you have trouble with building any of Erica Synths DIY projects, please, for advice & support refer to forums & DIY community. All the rare components are available at largest DIY retailers or here. 

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