◊ 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.

• VC Gate Schematic
• Forum discussion
• FPD front panel file (New!)

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