Compact LP VCF 116 Build Guide

Assembly Instructions

The LP VCF 116 module has no particular build requirements not already covered in the ‘General Build Info' page.

Calibration

1. Connect a sinewave of 440Hz @ 10V p-p to Signal input 1
2. Set Freq cut-off to 100%, Resonance to 0%
3. Adjust PR1 to give a sinewave on the Low pass output also of 10V p-p
4. Remove the sinewave signal from Signal input 1
5. Increase the resonance control to 100% (self-oscillating)
6. Measure the frequency at the Low pass output
7. Apply a CV of 0V to the CV In socket
8. Adjust the Freq cut-off to give 100Hz
9. Apply a CV of 4V to the CV In socket, this should give a frequency of 1.6kHz
10. If the frequency is flat (<1.6kHz), use Pr2 and make the frequency lower (flatter), if above 1.6kHz, use Pr2 to make the frequency even higher, this can be counter-intuitive. You will soon get the feel of how much to increase or decrease the frequency with Pr2.
11. Repeat steps 7-10 until calibrated

PCB Parts List

*See below for MOTM or MU Potentiometers

Module Parts List

PCB Layout