Erica Synths ‘Polivoks VCO II’– Full DIY Kit

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.

Features:

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 Layout – Component Placement

Polivoks VCO II BOM – Bill Of Materials

Technical specifications: