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Frequency Central
System X Oscillator VCO PCB + Panel - 10HP

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Item: N13-5616

Availability: Out of stock

System X Oscillator VCO PCB + Panel - 10HP


NOTE: This is for a DIY project and will require assembly. Listing includes PCB + FRONT PANEL ONLY. No components are included. 

Due to the nature of DIY projects, no returns allowed on kits that have been attempted to be assembled or with missing components. 

Frequency Central took the versatile Roland System 100M VCO design and modified it for eurorack while adding some extra features. The design is also modified to avoid any expensive or hard to find rare parts. The VCO outputs saw, square and triangle waves, and there is pulse width modulation on the square wave from an even square to a 90% duty cycle pulse wave. There is a sync input with "weak" and "strong" sync types.

This VCO has a huge range from a cycle every minute and twenty seconds all the way up to 100,000kHz. It is still easy to control though since there are seprate coarse and fine knobs for frequency. It is 1v/octave accurate for 7 octaves. In addition to a 1v/octave input there is a CV input with an attenuator for FM.


  • Roland System 100M style VCO
  • Saw, square & triangle wave outputs
  • PWM and manual pulse width from 50/50 to 90/10
  • Hard and soft sync
  • Frequency range of 0.0124Hz to 100,000Hz
  • Coarse and fine tune knobs
  • 1v/octave CV
  • 2nd CV input with attenuator

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  • Eurorack Format
  • 10HP Width
  • 60mm Depth
  • +12v: 10mA Current Draw
  • -12v: 10ma Current Draw

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