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Dan Armstrong – Green Ringer - Mu-Tron
DAN ARMSTRONG™ GREEN RINGER™ REPLICA COMPLETE KIT – General Guitar Gadgets
Josh Smith - Quick and Dirty - Why I choose Green Ringer style octave over the Octavia! - YouTube
Dan Armstrong "Green Ringer" /// Clone and Mods
Dan Armstrong Green Ringer Guitar Effect - Circuit Scheme
Dan Armstrong Green Ringer on Perfboard : r/diypedals
Dan Armstrong Green Ringer - CircuitLab
RING MODULATION | Dan Armstrong 'The Green Ringer' VS LovePedal 'Believe' | Board Or Bin - YouTube
WD Music Green Ringer | Effects Database
Dan Armstrong™ Green Ringer™ | General Guitar Gadgets
Dirtbox Layouts: Dan Armstrong Green Ringer
Dan Armstrong Green Ringer Rehoused & Upgraded | Reverb
OCTAVE UP Green Ringer™ clone | chicagostompworks
Dan Armstrong Green Ringer | Reverb
Dan Armstrong™ Green Ringer™ | General Guitar Gadgets
Dan Armstrong Green Ringer on Perfboard : r/diypedals
Guitar FX Layouts: Dan Armstrong Green Ringer
File:Dan Armstrong Green Ringer circuit - an octave-up effect with a ring-modulator touch to it - just finished building (2006-03-05 22.51.45 by germanium).jpg - Wikimedia Commons
Dinosaur Green Ringer | A Dan Armstrong Green Ringer clone w… | Flickr
1975 Musictronics Dan Armstrong Green Ringer Green > Effects | Rivington Guitars
