Akashic Guitar effects circuit lookup
MIDVOLUME

Enclosure not stated · 2 knobs

Tagboard Effects

Fender Eric Clapton 25db Mid BoostVerified

Based on the Fender Eric Clapton Active Mid-Boost· 3 other boards clone it

Category
Boost
Controls
Mid · Volume
Build
Vero· 19×14· 16 cuts, 7 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Booster, Fender

From the post

Fender's take on trying to get EC's strat to sound like a Gibson. Some people seem to like it a lot, while others.. Not so much. But as i stumbled on a schematic, i thought this could work well as a pedal. With four transistors and not-so-simple design, there's little chance of fitting this onboard any guitar.. There are some non-standard values for the resistors, but as always, you should be fine with the closest ones you have. The layout doesn't have the magical TBX Tone control in it, but i've added another image that shows how to wire it up.

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 Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.

Parts list 34 rows

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Check before you build · 2 values the reader of this layout was not sure of
  • 133K, 215K and 232K: printed clearly, unusual values
  • 120pF at the top left corner: the leading 1 is partly hidden under the board edge, could be 20pF
RefValueNormalizedTypeNotes
Resistors 17
×222K22kread from the layout by eye
×11.5M1.5Mread from the layout by eye
×1133K133kread from the layout by eye
×12.2K2.2kread from the layout by eye
×133K33kread from the layout by eye
×147Ω47read from the layout by eye
×247K47kread from the layout by eye
×1100K100kread from the layout by eye
×1330K330kread from the layout by eye
×11.8K1.8kread from the layout by eye
×14.7K4.7kread from the layout by eye
×1470Ω470read from the layout by eye
×1215K215kread from the layout by eye
×13.3K3.3kread from the layout by eye
×1232K232kread from the layout by eye
×115K15kread from the layout by eye
×182K82kread from the layout by eye
Capacitors 10
×1120pF120pread from the layout by eye
×110pF10pread from the layout by eye
×1330pF330pread from the layout by eye
×21nF1nread from the layout by eye
×16.8nF6.8nread from the layout by eye
×122nF22nread from the layout by eye
×147nF47nread from the layout by eye
×182nF82nread from the layout by eye
×1100nF100nread from the layout by eye
×410uF10uelectrolytic; read from the layout by eye
Diodes 1
D11N58171N5817added polarity protection; read from the layout by eye
Transistors 4
Q12N50882N5088read from the layout by eye
Q22N50882N5088read from the layout by eye
Q32N50882N5088read from the layout by eye
Q42N50872N5087PNP; read from the layout by eye
Potentiometers 2
MidB250KB250kPotentiometerread from the layout by eye
VolumeB250KB250kPotentiometerread from the layout by eye

Other boards based on the Fender Eric Clapton Active Mid-Boost