beavis audio research - stompbox schematics
Green Ringer - Octave UP!
Dan Armstrong Green Ringer (73' and Musitronics) • FXDB, Gearphoria and I Heart Guitar Forums
Dan Armstrong Green Ringer | Reverb
Green Ringer "Nulling" Mod
Dan Armstrong Green Ringer Guitar Effect - Circuit Scheme
Dan Armstrong Green Ringer Guitar Effects Pedal Green | Musician's Friend
Guitar FX Layouts: Dan Armstrong Green Ringer
Dan Armstrong "Green Ringer" /// Clone and Mods
Guitar FX Layouts: Dan Armstrong Green Ringer
Optical comp + Green Ringer (my first pcb designs)
Dan Armstrong™ Green Ringer™ | General Guitar Gadgets
1976 Dan Armstrong Green Ringer > Effects | Southside Guitars
Green Ringer w useful additions/mods : r/diypedals
DAN ARMSTRONG™ GREEN RINGER™ REPLICA RTS PCB – General Guitar Gadgets
Green Ringer Lowpass Filter Mod: a fresher, cleaner octave
Dan Armstrong "Green Ringer" /// Clone and Mods
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
Perf and PCB Effects Layouts: Dan Armstrong Green Ringer
Green Ringer with Mods – Super-Freq
Vintage Original early 70's Dan Armstrong Green Ringer by | Reverb
Green Ringer "Nulling" Mod
GREEN RINGER Service Manual download, schematics, eeprom, repair info for electronics experts
Dan Armstrong Green Ringer mods
