◊ PCB Documentation


110 Dual Voltage-controlled Gate

A pair of all-discrete VC Gates (VCAs) based on the Buchla 110 circuit. This design is transistor-based, and preceded the Lowpass Gate with its distinctive vactrol "ring" sound.

PCBs are $25.00 @ — ORDER HERE

Bill of Materials (value/qty)

  • Resistors
    • 10r x 2
    • 150r x 4
    • 220r x 2
    • 330r x 4
    • 470r x 2
    • 68r x 2
    • 1k x 2
    • 1k5 x 4
    • 2k2 x 10
    • 4k7 x 2
    • 6k8 x 8
    • 10k x 2
    • 33k x 2
    • 68k x 4
    • 330k x 2
    • 1k trimmers x 4
    • 50k pot., audio taper x 2
  • Capacitors
    • 0.1uf x 2
    • 1uf electro. x 2
    • 100uf electro. x 4
  • Transistors
    • 2n3565 x 14
    • (note: 2 pairs should be matched, or substitute 2 x IT122 dual transistors)
  • Misc.
    • ferrite bead x 1
    • banana jacks, in (black) x 2
    • audio jacks, 1/8" or tinijack, x 6