Steffcorp 2600 VCO Eurorack Oscillator Module

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The Steffcorp 2600 VCO is an analogue oscillator with full voltage control based on the 4027-1 ’VCO-2’ oscillator used in the ARP 2600.

It’s not just a copy however, we have gone to great lengths to bring it into the 21th century.

A much needed precision reference voltage was added, as well as buffers and a few other goodies.

Going SMT offered the means of improving the PCB-layout even further, as well as a selection of easy-to-source parts. No more treasure hunts and extravaganza prices.
On top of this, a good bit of time was spent on analyzing and comparing modern parts to find the best matches of the original part specifications.

Main controls

  • Frequency & Fine-tune
  • PW
  • Attenuators for PWM and FM


  • 1V/OCT
  • 2x FM
  • PWM
  • Hard Sync


  • Saw, Pulse, Triangle, Sine & Hard Sync


  • 10V Precision Reference Voltage
  • Power protection
  • Buffered inputs & outputs
  • Great Tracking
  • FREQ control 0Hz – 10KHz
  • FINE control +/- 6 semitones
  • Power 46mA +12V / 36mA -12V
  • Width 14HP
  • Depth about 40mm
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