Akashic Guitar effects PCB lookup
DISTORTIONHIGHLOWVOLUME

125B · 4 knobs

PCB Guitar Mania

Swedish Metal

Based on the BOSS HM2· 1 other board clones it

Category
Distortion· High gain Distortion
Controls
Distortion · High · Low · Volume
Difficulty
Advanced
Price
€11.90out of stock

Heads up Builders widely report inconsistent quality from PCB Guitar Mania boards, and whether a given board works is a gamble. Read recent forum reports before ordering.

From the vendor

Project overview

Inspired by Boss HM2, one of the most important distortion pedals in metal’s history which defined 80s heavy metal tone. This pedal is a cult classic that any guitarist must-have has a companionship.

Introduction

We actually do not understand why the Boss MH2 even has knobs, but we added one more to make it more useful. I mean, you crank them all and get the sound 1990 metal tone from Sweden. Instant Entombed buzzsaw tones just by pushing the footswitch down. But still, giving the EQ a third band makes it easier to use it with all kinds of amps. Make sure you check the footprint of the 2.2uf you buy. They can cause some headaches if you source too big ones.

There is scarcely a more important pedal in underground metal. Used in many different contexts across the last three decades, it is still in force and vigorous than ever.

Controls

• Distortion

• Hight

• Low

• Mid* (Optional)

• Volume

For further analysis on this circuit, take a look at this thread on Free Stomp Boxes Forum.

For any technical questions regarding this build, don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.

Swedish Metal 1.1v – Building Docs

Swedish Metal 1.0v – Building Docs

Swedish Metal – Drilling Template

Schematic

The schematic is in the vendor's build document, page 5. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 79 rows

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RefValueNormalizedTypeNotes
Resistors 37
R3710k10k
R384k74.7k
R12M22.2M
R210k10k
R31M1M
R410k10k
R522k22k
R6100k100k
R7470k470k
R822R22
R9150R150
R1010k10k
R1147k47k
R1222k22k
R13100k100k
R14470k470k
R15120R120
R161k1k
R1768k68k
R1810k10k
R19220k220k
R2010k10k
R2110k10k
R2268k68k
R233k33.3k
R24330R330
R25100k100k
R26330R330
R28330R330
R29100k100k
R303k33.3k
R3110k10k
R3210k10k
R33470k470k
R341k1k
R35100k100k
R3610k10k
Capacitors 23
C147n47n
C247n47n
C3100pF100p
C447n47n
C747n47n
C8100pF100p
C9100pF100p
C101u1u
C111uF1u
C121n1n
C131.5uF1.5u
C1468n68n
C15150n150n
C174n74.7n
C18100n100n
C19470pF470p
C2147n47n
C221uF1u
C547uF47u
C610uF10u
C2010uF10u
C23100uF100u
C2447uF47u
Diodes 8
D01N58171N5817
D11N9141N914
D21N9141N914
D31N9141N914
D4BAT46BAT46
D5BAT46BAT46
D61N9141N914
D71N9141N914
Transistors 4
Q12N54572N5457
Q22N50882N5088
Q32N50872N5087
Q42N50882N5088
ICs 3
IC1JRC4558JRC4558
IC2JRC4558JRC4558
IC3JRC4558JRC4558
Potentiometers 4
DISTORTION250KBB250kPotentiometer
HIGH10KAA10kPotentiometer
LOW10KAA10kPotentiometer
VOLUME10KAA10kPotentiometer

Other boards based on the BOSS HM2