Intellijel Designs
Rubicon Thru Zero VCO - 18HP

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Item: N13-4017

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Rubicon Thru Zero VCO - 18HP


The Intellijel ‘Rubicon’ is a Thru Zero Frequency Modulation (TZFM) Triangle Core VCO designed by David Dixon after many years of experimenting and countless PCB revisions, resulting in a totally unique analog TZFM VCO! 


  • Triangle Core
  • Switchable Linear and (for the first time in any module) Exponential TZFM
  • Linear Index VCA for dynamic control of TZFM depth
  • Symmetry control (full Clock-wise is normal, full Counter-clock-wise gives reversed waveforms, centered the VCO is at 0 Hz) with VC Input
  • 12 primary waveform types: sine, sigmoid, double sigmoid, triangle, saw, double saw, zigzag, square, pulse (center modulated), pulse (edge modulated), double pulse, sub
  • Suboctave circuit (similar to the one found on the roland sh-101) with -1 and -2 octaves (suboctave output is affected by fm just like the main signals)
  • Soft sync (aka reversing sync) with attenuator
  • Hard sync with selectable reset direction (determines if the triangle starts moving up or down after a reset, very useful in LFO mode)
  • PWM and EXP FM with dedicated attenuators
  • Wide Frequency Range – hi range (VCO): 1 hz to 24 khz; lo range (LFO): 0.01 hz (100 seconds) to 240 hz
  • Precise Tracking within 0.1% over 8 octaves

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  • Eurorack Module
  • 18 HP Width
  • 38mm Depth
  • Current Draw: 107mA @ +12V, 95mA @ -12V

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