GuitarPCB Emerald Ring, Manual

Page: 1 / 5

GuitarPCB.com
Emerald Ring is designed to be an easy add-on to just about any Fuzz, or Gain circuit you wish to add an
Octave tone to. By driving the Emerald Ring with a Fuzz Face or other such as Angry Red Camel, Sriracha
Fuzz, Emexar
​ ​
(Dist+) to result in much stronger octave/harmonics and less gating splatter.
Board Dimensions (W x H) 1.15” x 1.40” or 29 x 36 mm.
PARTS LIST
Part Value Part Value
R1 2M2 C1 47n
R2 160k C2 *47n
R3 560k C3 *47n
R4 6k2 C4 100n
R5 18k C5 100u
R6 *10k D1 **1N914
R7 *10k D2 **1N914
R8 *68k D3 BiColor CA LED
R9 *68k Q1 2N5088
R10 *22k Q2 2N3906
R11 *22k Q3 2N5088
R12 10k
R13 47k
R14 1k8
*Values should be precisely matched using a Digital Multimeter, in particular Capacitors, Use 1% Resistors for a closer
tolerance match. Capacitors have a wider tolerance, typically 5% to 20%.
** Silicon or germanium diodes will produce different sounds, with different circuits. Socket and See! If you have a DMM
or circuit, capable of matching the forward voltage, it is preferable to do so.