M2SYNTH HP VCF 111 User manual

HP VCF 111 V1d 1
HP VCF 111
Kit Assembly Instructions

HP VCF 111 V1d 2
Features
1 Volt / Octave cut-off frequency CV)
Cut-off modulation input with potentiometer attenuator (FM)
Resonance potentiometer control with an external CV resonance input
Self-oscillates with high resonance settings.
Kit Contents
Description
Reference
MOTM
Qty
MU
Qty
Notes
Components Kit
7216-111-1
1
1
See BOM
Accessories Pack including:
7216-111-2
1
1
Pot Sticky Pads
7210-188
4
4
10mm M4 Spacers
7210-186
4
4
M4 x 14 Cap Head Screws
7210-187
4
4
M3 x 8mm Stainless Panel Screws
7216-151
4
14-Pin IC Socket
7212-332
1
1
18-Pin IC Socket
7212-334
1
1
Power Lead
7216-164
1
MU Voltage Adapter
1
MOTM Front Panel
7216-511
1
MOTM Back Panel
7216-803
1
1U4P6S
MU Front and Back Panel
7219-511
1
Main PCB
7216-011
1
1
Jack Socket PCB
7215-723
1
1
Jack Sockets
7216-606
1
1
Pack of 6
B100k Pots Long Shaft Angled
7216-704
1
Pack of 4
B100k Pots Short Shaft Angled
7216-734
1
Pack of 4
KM20B Knobs
7212-104
4
Pack of 4
MU Knobs
7219-104
4
Pack of 4
General Assembly Guidance
Booklet
1
1
BOM
S-7216-011-c
1
1
Circuit Schematic
S-7216-011-c
1
1
PCB Layout
S-7216-011-c
1
1

HP VCF 111 V1d 3
Assembly Instructions
The LP VCF module has no particular requirements not already covered in the ‘General
Guidance on a M²Synth Module Assembly’ booklet included with this kit.
Calibration
1. Power up module and allow to ‘warm up’ for 10 minutes
2. Connect a 440Hz sine wave @ 10V Pk-Pk to Signal input 1. Resonance to 0%, Cut-off
to 0%, Signal 1 Level to 100%.
3. Adjust Pr1 to give a 10V Pk-Pk output using an oscilloscope
4. Remove the sine wave signal from input 1. Set resonance to 100%. Connect a
frequency meter to the output.
5. Adjust Cut-off to give 100Hz
6. Apply a CV of 4V to the COF CV in 1 input
7. Use Pr2 to calibrate at 1.6kHz (see note below)
8. Repeat from step 5 until 4V gives 1.6kHz
Note: If the frequency is flat (<1.6kHz), use Pr2 and make the frequency lower (flatter), if
above target frequency, use the trimmer 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 by
Specification
Supply voltage +/-12Vdc
Supply current +13mA / -16mA
Waveform levels +/-5V
Frequency range: 19Hz to 15kHz without any CV applied
Main PCB dimensions 43.5x130mm
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