Eurorack Serge Variable Q (VCFQ) – 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 × 4 – optional

In stock

THAT 2180 IC Chip × 3 – optional

Random Source recommend THAT 2180C for this project


DW3 - DPDT ON-ON – optional

In stock

VERTICAL: B50K - 50K Linear × 4 – optional

In stock

Thonkiconn Jacks with Knurled Nut × 10 – optional

In stock


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, combining the original Serge circuits with the advantages of today’s technology in Eurorack format.


The Serge Extended Variable Resonance filter (VCFQ) is probably the most famous filter of the Serge system and one of the essential Serge modules. It is an excellent, extremely versatile general-purpose VCF that provides simultaneous low-pass, high-pass, band-pass and notch (band-reject) outputs combined with unique flexibility. Its trigger in, LOW mode and self osciallation allow a variety of uses from Oscillator to VC processing.

Now – for the first time ever and licenced by Serge – the VCFQ is available as DIY kit for Euro.

Build documentation: Serge VCFQ BOM / Build doc

Thonk Kit Build Notes: Here

Some details of the Random*Source Serge VCFQ module kit:

  • Under licence from Serge Tcherepnin
  • Designed for High-end VCAs (THAT2180)
  • No matching of transistors required
  • No wiring needed
  • Eurorack format (3U), 14 hp
  • Power consumption: 52mA @ +12V, 52mA @ -12V
  • Module depth: < 40mm (1.5″)

The Random*Source Kit contains:

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


Additional information

THAT 2180 IC Chip

Audio Grade

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