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* Do NOT bring the resonance trimmers out to the front panels as controls. They are very much a "set and forget" adjustment. <br/>That being said, if you still want to bring them to the panel, first set the trimpot on the board to find out where the resonance point occurs. Measure the resistance of the two sides of the trimpot from the wiper. Remove the trimpot from the PCB. Pick two trimpots that have sufficient range to cover these values. Pick a pot with a small resistance value, say 1k to 5k, and solder it between the two trimpots, with the wiper going to where the wiper of the original trimpot went on the PCB. Wire the other ends of the trimpots to the remaining trimpot connections on the PCB, the result being that you have two trimpots in series with the panel mounted pot. It should now be possible to adjust the trimpots so that range of the panel mounted pot goes from the shortest possible output, to just before the oscillator starts free running.
* A 10 to 22 ohm resistor can be used instead of the Ferrite bead. If you don't care about power-rail noise, just use a link instead.
== CC-BY-NC ==
Readers are permitted to construct these circuits for their own personal use only. Ken Stone retains all rights to his work.
== See also ==
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== References ==
* ''[https://web.archive.org/web/20180209234737f/http://www.CGS.synth.net:80/modules/CGS18v1.0_drum.html Drum Simulator for music synthesizers.]''
== External links ==
* [http://bompiler.com/pcb/cgs18 CGS18 v1.0 BOM] at BOMpiler
[[Category:CGS
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