This link is part of the Free Information Society website and is for mainly guitar related effects pedals and amplifiers. The rest of the website has additional circuit diagrams others may find interesting.
http://www.freeinfosociety.com/electronics/schempage.php?cat=1
Audio Circuit Collection
Predominantly circuit diagrams for music related equipment like guitars, but site has many others
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darren adcock, FuZZ1L0G1C, Soulwyvern84 and 1 other person like this.
