Eurorack Serge Variable SLOPE (VCFS) – Panel + PCB set

From: £44.00

Officially licensed by Serge Tcherepnin

EU Price  does not include EU VAT.

Black 6.35 round shaft 1900h knobs × 6 – optional

In stock

THAT 2180 Chip × 2 – optional

Random Source recommend THAT 2180C for this project

A - Matched Pair - 2N3904 – optional

In stock

VERTICAL: B50K - 50K Linear × 5 – optional

In stock

VERTICAL: B250K - 250K Linear – optional

In stock

Thonkiconn Jacks with Knurled Nut × 8 – optional

In stock

SKU: Bundle_RS_VCFS_PanelPCB Categories: , , , , , ,


SERGE MODULAR FOR EURORACK – Under licence from Serge Tcherepnin – This is not a full kit.

“Serge Modular” is an analogue modular synthesizer system developed by French composer and electronic designer Serge Tcherepnin in the 1970s at The California Institute of the Arts. Serge’s vision to create a “people’s synthesizers” led to a unique modular music system with an iconic design.

In collaboration with and under licence from Serge Tcherepnin, Random*Source offers a range of Serge modules in Eurorack format, combining the original Serge circuits with the advantages of today’s technology.


The Serge Extended Variable Slope filter (VCFS) is a unique filter of the Serge system, covering a wide range of sonic character. According to the 1983 Serge catalogue, the “VARIABLE SLOPE VCF (VCFS) allows the amount of filtering to be dynamically controlled, from barely perceptible filtering to highly resonant, sharp cut-offs. With the variable slope control in the center position, the VCFS acts as a typical flat-response VCF, with high, low, and band~pass outputs available simultaneously. The slope of the cut-off is 12 db/octave. As the control is moved toward the maximum position, the resonance of the filter increases, so that the cut-off becomes sharper.”

Build documentation: Serge VCFS BOM / Build doc
  • Under licence from and in cooperation with Serge Tcherepnin
  • Designed for High-end VCAs (THAT2180C)
  • New Q knob for increased resonance
  • No wiring needed
  • Eurorack format (3U), 14 hp
  • Power consumption: 40mA @ +12V, 40mA @ -12V
  • Module depth: < 40mm (1.5″)

This Random*Source Set contains:

  • Color printed front panel, 2mm, cnc made in germany
  • 1 Serge VCFS Euro pcb (through-hole, no components mounted)
  • 1 matching component pcb


Additional information

Black 6.35 round shaft 1900h knobs

Weight 0.0035 kg

THAT 2180 Chip

Weight N/A
Audio Grade

2180C – High Grade, 2180B – Super High Grade, 2180A – Pointlessly Audiophile Grade

A - Matched Pair - 2N3904

Weight 0.0008 kg

VERTICAL: B50K - 50K Linear

Weight 0.00513 kg

VERTICAL: B250K - 250K Linear

Weight 0.00513 kg

Thonkiconn Jacks with Knurled Nut

Weight 0.0017 kg