The LOW-PASS GATE module is directly inspired by the Buchla 292 and designed for the Serge Modular 4U format. Unlike the original design, this module only features COMBO mode and LOW-PASS mode, eliminating the VCA mode. Staying true to the original design this module is based around 2 VTL5C3 vactrol based VCAs with added circuitry to help with bleed associated with the vactrols.
Low-Pass Gate BOM (order 2 BOM's)
VTL5C3 Vactrols can be found HERE