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Sites
General websites about guitar effects and related topics.
Dirk_Hendrik
Dirk_Hendrik likes Mostortions just like me. Other than that he knows his stuff and runs a very informative site.
Dirk_Hendrik Guitar Effects stuff. Effects with a different View.
Jacques Stompboxes
The site got an overhaul and it seems a lot of the old stuff is gone. And I didn't even manage to browse through all of it! I'll check if I can salvage anything.
This site is kind of a treasure trove. Click on “Vintage Collection” on the top right and enjoy the ride.
GEO FEX
One of the oldest DIY sites together with AMZ-FX.
AMZ-FX
One of the oldest DIY sites together with GEO FEX.
www.breem.nl
Amazing Dutch site about the wondrous world of High-End HiFi, approached from a rational point of view. If you're Dutch and into electronics and audio read everything from A to Z. Spoiler: expect some myth busting!
runoffgroove.com
Great collection of original schematics.
Juansolo FX
Home of the renown BoobTube and a great source for schematics and tutorials.
DIYstompboxes wiki
Wiki about DIY effect building. Mostly links to forum threads.
Fuzz Central
Making the world a fuzzier place.
Experimentalists Anonymous
Experimentalists Anonymous has been an online resource and information repository for people interested in building their own audio circuits since 2003. We host a variety of community- and individually-run sites. Especially the DIY Archives contain a wealth of useful schematics.