ER-VCA2-01

Features

• Dual Voltage Controlled Amplifier (VCA)
• Based on HAGIWO's LM13700 Dual VCA - Modular Synth Made for 550 Yen
• LM13700 Operational Transconductance Amplifier
• Adjust POTS between VCA and Mod
• 3U tall
• 6HP wide
• 3 card set
• LM13700 based
• Eurorack
• +/- 12V Power, 10-pin power connector

Connectors

J1 - Daughtercard Pots

• RV1 = Modulation Adjust Channel 1
• RV2 = Modulation Adjust Channel 2

J2 - Daughtercard

J3 - Daughtercard

Reference

• Dual Log/Linear VCA - Article by Ray Wilson
  • Has adjustment procedure

Checkout

Rev 1

• Headers between cards do not line up
  • Fix on Controls card
    • Make Rev 2 Controls card
    • Move down bottom header J2 to match daughtercard
  • Bend pins on bottom header between cards

Assembly Sheet

• ER-VCA2-01 Rev 1 Assembly Sheet