Erica Synths ‘Polivoks VCO II’ – DIY Partial Kit

£47.00 (Excl. VAT)

Updated design based on the original Polivoks VCO

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

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SKU: PP_Erica_Polivoks_VCO-II_ParKit Categories: , , , , Brand:


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

  • Polivoks VCO II PCB Set
  • Polivoks VCO II Eurorack Front Panel (12HP)
  • Matched Transistor IC
  • PCB Connectors & Spacer
  • 5 Position Rotary Switch

Erica Synths Knobs can be purchased here:

The Polivoks VCO II features the same core VCO of the famous Russian Polivoks Synth but with a number of new improvements. The exponential converter circuit uses the same matched transistor IC’s that were used in the original Polivoks. New improvements include:

  1. +-10V regulators for greater stability of operation,
  2. signal amplitudes adjusted to match requirements of contemporary modular synths – all output signals are also available simultaneously
  3. CV inputs redesigned to accept positive CV signals
  4. PWM circuit with manual and voltage controlled pulse width
  5. Sync input, so you can synchronise the Polivoks VCO to another VCO in your system.


Simultaneous Triangle, Saw and Pulse wave outputs
Manually adjustable and CV controlled pulse width modulation
Tracking across 8 octaves
Exponential FM input with dedicated attenuator
Synchronization input
5-Way Octave switch
Skiff-friendly design

Polivoks VCO II – Assembly Guide | BOM

Component Placement, Schematics – Build Documents

Technical specifications:

Audio output amplitude 10Vptp
Octave range C0 – C8
Panel width
Module depth 35mm
Power consumption 34mA@+12V, 36mA@-12V

Additional information

Weight 0.1002 kg
HP Size