Green Ringer "Nulling" Mod
Green Ringer - Octave UP!
Dan Armstrong Green Ringer Guitar Effects Pedal Green | Musician's Friend
Green Ringer Kit | PuzzleSounds
Josh Smith - Quick and Dirty - Why I choose Green Ringer style octave over the Octavia! - YouTube
Green Ringer w useful additions/mods : r/diypedals
Dan Armstrong – Green Ringer - Mu-Tron
WD Music Green Ringer | Effects Database
RING MODULATION | Dan Armstrong 'The Green Ringer' VS LovePedal 'Believe' | Board Or Bin - YouTube
Dan Armstrong Green Ringer Guitar Effect | Electronic Schematic Diagram
Green Ringer - EasyEDA open source hardware lab
beavis audio research - stompbox schematics
Dan Armstrong - Man & Guitars
File:Atmos - Green-Ringer-based octaver with extra LED clipping (2007-02-05 21.45.11 by germanium).gif - Wikimedia Commons
Green Ringer with Mods – Super-Freq
Emerald Ring - Best Octave Up Green Ringer style PCB - GuitarPCB
NGOrder Spice Girl White & Green Ringer Crop T-Shirt
Green Ringer Clone - CircuitLab
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
Guitar FX Layouts: Dan Armstrong Green Ringer
gaussmarkov: diy fx » Green Ringer
Dan Armstrong Green Ringer 1970's Green | Reverb
