CGS Serge voltage controlled gain cell (view source)
Revision as of 18:45, 19 July 2022
, 1 year agoText replacement - " (archived) by Ken Stone, 2011, with permission of the author" to " by Ken Stone, 2011, with permission of the author - archived"
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Like types of transistors must be matched, more so with the NPN pair, as the trimpot can deal with some degree of mismatch in the PNP pair. See one of the other online resources for transistor matching, or follow the [[CGS simple transistor matching guide]] which will provide adequate results.
[[File:cgs_photo_cgs108v10_vca.jpg|thumb|center|150px|]]
Before you start assembly, check the board for etching faults. Look for any shorts between tracks, or open circuits due to over etching. Take this opportunity to sand the edges of the board if needed, removing any splinters or rough edges.
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* 330R refers to 330 Ohms. 100 nF = 0.1 uF, etc.
* PCB is 1.4" x 1".
== CC-BY-NC ==
Readers are permitted to construct these circuits for their own personal use only. Ken Stone retains all rights to his work. Serge Tcherepnin retains all rights to his work.
== See also ==
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== References ==
* [https://web.archive.org/web/
== External links ==
* [http://bompiler.com/pcb/cgs108 CGS108 BOM] at BOMpiler
* [http://groups.yahoo.com/group/cgs_synth CGS Synth discussion group], for discussion of locating parts, modifications and corrections etc.
* [http://www.deliandiver.com/serge-gain-cell Serge Gain Cell], schematic at the Delian Diver website
* [https://www.modwiggler.com/forum/viewtopic.php?p=3503106 Serge/cgs108 gain cell vca], Mod Wiggler Forum, Apr. 2021
* [https://patents.google.com/patent/US3518578A/ US patent 3,518,578], ''Signal compression and expansion system'' by Thomas Stockham and Alan Oppenheim, 1967 - a diode precursor of the Serge gain cell <!-- <ref name="cgs108">[https://www.modwiggler.com/forum/viewtopic.php?p=3503106 Serge/cgs108 gain cell vca], Mod Wiggler Forum, Apr. 2021</ref> -->
* [https://patents.google.com/patent/US3714462A/ US patent 3,714,462], ''Multiplier circuits'' by David Blackmer, 1971 - a transistor precursor of the Serge gain cell<!-- <ref name="cgs108"/> -->
[[Category:CGS
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