Akashic Guitar effects circuit lookup
BASSMIDTREBLEGAINLEVEL

1590B · 5 knobs

Effects Layouts (blog)

Marshall Guv'norVerified

Based on the Marshall Guv'nor· 20 other boards clone it

Category
Distortion
Controls
Bass · Mid · Treble · Gain · Level
Layout
Verified · Effects Layouts (blog) marks it as built and working
Tags
Distortion, Marshall, Overdrive

From the post

Here's another layout that needed a refresh/correction. Old layout was pretty trash and had a few errors which have all be resolved. Similar to the Blues Breaker (at least in circuit topography), but with a 3-band EQ and hard clipping. Bit more gain and distortion on tap. Here's the schematic for reference. Should fit nicely in a 1590B.

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 30 rows

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RefValueNormalizedTypeNotes
Resistors 11
×1100Ω100read from the layout by eye
×2680Ω680read from the layout by eye
×11K1kread from the layout by eye
×11.5K1.5kread from the layout by eye
×12.2K2.2kread from the layout by eye
×110K10kread from the layout by eye
×122K22kread from the layout by eye
×247K47kread from the layout by eye
×1680K680kread from the layout by eye
×11M1Mread from the layout by eye
×12.2M2.2Mread from the layout by eye
Capacitors 10
×1100pF100pread from the layout by eye
×1220pF220pread 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
×168nF68nread from the layout by eye
×3100nF100nread from the layout by eye
×3220nF220nread from the layout by eye
×110uF10uelectrolytic; read from the layout by eye
×1100uF100uelectrolytic; read from the layout by eye
Diodes 1
×11N58171N5817read from the layout by eye
ICs 1
IC1TL072TL072read from the layout by eye
Potentiometers 5
BassA10KA10kPotentiometerread from the layout by eye
MidA10KA10kPotentiometerread from the layout by eye
TrebleA10KA10kPotentiometerread from the layout by eye
GainB100KB100kPotentiometerread from the layout by eye
LevelB100KB100kPotentiometerread from the layout by eye
LEDs 2
D13mm red LED3MM RED LEDclipping; read from the layout by eye
D23mm red LED3MM RED LEDclipping; read from the layout by eye

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