Akashic Guitar effects circuit lookup
GAINTONEVOLUME

Enclosure not stated · 3 knobs

Effects Layouts (blog)

Catalinbread Galileo Mk. IIVerified

Based on the Catalinbread Galileo Mk. II· 4 other boards clone it

Category
Overdrive
Controls
Gain · Tone · Volume
Layout
Verified · Effects Layouts (blog) marks it as built and working
Tags
Catalinbread, Overdrive

From the post

The Catalinbread Galileo emulates an Vox AC30 and a Rangemaster treble boost in one to give the user tones like Brian May of Queen. The Galileo Mk. II differs from the Mk. I with fewer controls and in a much more pedalboard-friendly enclosure. It's a bit stripped down from the original, but sounds fantastic, and some say it's easier to dial in tones on the Mk. II over the Mk. I. Comparing the schematic with the Catalinbread Sabbra Cadabra, the Galileo has a very similar structure. The input stage is similar (though not identical), the stacked JFET gain stages are nearly identical, as is the gain recovery stage after the tone control. Though, this makes sense since both are emulating British tube amps and Rangemaster variations. To board mount the pots, use right angle PCB mount types from the solder-side.

Schematic

This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.

Parts list 38 rows

Report a wrong parse

Got parts in a drawer? See what you can build with them.

RefValueNormalizedTypeNotes
Resistors 16
×51M1Mread from the layout by eye
×41K1kread from the layout by eye
×210K10kread from the layout by eye
×2100K100kread from the layout by eye
×28.2K8.2kread from the layout by eye
×22.2M2.2Mread from the layout by eye
×168K68kread from the layout by eye
×1220K220kread from the layout by eye
×12.2K2.2kread from the layout by eye
×1680K680kread from the layout by eye
×162K62kread from the layout by eye
×112K12kread from the layout by eye
×11.5K1.5kread from the layout by eye
×156K56kread from the layout by eye
×1470K470kread from the layout by eye
×14.7K4.7kread from the layout by eye
Capacitors 12
×247pF47pread from the layout by eye
×1470pF470pread from the layout by eye
×14.7nF4.7nread from the layout by eye
×210nF10nread from the layout by eye
×222nF22nread from the layout by eye
×2100nF100nread from the layout by eye
×1220nF220nread from the layout by eye
×1680nF680nread from the layout by eye
×21uF1uelectrolytic; read from the layout by eye
×12.2uF2.2uelectrolytic; read from the layout by eye
×122uF22uelectrolytic; read from the layout by eye
×247uF47uelectrolytic; read from the layout by eye
Diodes 1
×11N40011N4001read from the layout by eye
Transistors 6
Q12N22222N2222read from the layout by eye
Q2MPF4393MPF4393JFET; read from the layout by eye
Q3MPF4393MPF4393JFET; read from the layout by eye
Q4MPF4393MPF4393JFET; read from the layout by eye
Q5MPF4393MPF4393JFET; read from the layout by eye
Q6MPF4393MPF4393JFET; read from the layout by eye
Potentiometers 3
GainC5KC5kPotentiometerread from the layout by eye
ToneA1MA1MPotentiometerread from the layout by eye
VolumeB250KB250kPotentiometerread from the layout by eye

Other boards based on the Catalinbread Galileo Mk. II