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Fuzz Central
runoffgroove.com
home-wrecker.com
Uzzfay Utsgay
TONEPAD
General Guitar Gadgets
Circuit Snippets
Selected Stompbox Schematics
Analogguru´s Paradise
DIYStompboxes gallery
commonsound collective
\\\ Original Analog Bass/Guitar Effects and DIY ///
John's Obsessions
Munky DIY
moosapotamus.net
schematics(DISCOFREQ'S FX SITE)
hammer.ampage.org
gaussmarkov: diy fx
GodiksenNet.com
Tremolo.pl
DIY guitarist.com
electronic projects, guitar gadgets and failures
SS Guitar Wiki Site
A Little History(D*A*M Stompboxes)
GuitarPedalsEffects.com