5th August 2019 – Added new wiring diagram.

4th August 2019 – Added new pictures, updated links to build guide and PCB suppliers.


The PCB (CGS 112) is available from Modular Addict and Elby, and more detailed construction notes are here

This panel utilises Clee’s 4U Bracket, also available from Synthcube and Modular Addict

Here is a Mouser BOM for the main CGS112 board and the three CGS108 Gain Cells:

271-100-RC | 3
271-330-RC | 9
271-1K-RC | 1
271-2K-RC | 1
271-8.2K-RC | 6
271-15K-RC | 2
271-22K-RC | 2
271-47K-RC | 5
271-100K-RC | 12
271-110K-RC | 1
271-150K-RC | 7
271-220K-RC | 1
271-330K-RC | 1
270-1.5M-RC | 4
858-67WR100LF | 1
858-67WR100KLF | 3
810-FK28C0G1H050C | 3
810-FK28C0G1H220J | 2
810-FK28C0G1H470J | 3
810-FK28C0G1H221J | 2
871-B32529C102J | 1
810-FK28C0G1H103J | 6
80-PHE426DJ6100JR05 | 3
581-08055C104K | 3
667-ECA-1EM100 | 2
512-BC547CTA | 6
512-BC557BTA | 6
512-1N4148 | 11
623-2743001112LF | 2
595-TL072IP | 4
595-TL074CN | 1
575-144308 | 4
530-108-0902-1 | 1
530-108-0910-1 | 3
530-108-0903-1 | 6
649-DILB14P-223TLF | 1

This does not include:

SWITCH
KNOBS
POTS
POWER HEADER / CONNECTOR
HARDWARE (NUTS, BOLTS ETC)
WIRE
SIL HEADERS / CONNECTORS
1/4″ SOCKETS
CLEE 4U BRACKET
PANEL
PCB SET

Which I purchase elsewhere. It does include sockets for all ICs. Remember you should match the 547’s and 557’s in the gain cells, so you may want to buy more than listed. The BOM does include the banana sockets.

New wiring diagram, showing wire lengths and bracket mounting etc:

 

 

Old wiring diagram, which might be correct too!

VCFQ WIRING DIAGRAM V1Alternate panel: