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SUSTAINTONELEVEL

Enclosure not stated · 3 knobs

JMK PCBs· 015

Operational Muff

Based on the EHX Op-Amp Big Muff· 3 other boards clone it

Category
Fuzz
Controls
Sustain · Tone · Level
Price
$9.00in stock
Buy the PCB at JMK PCBs Build document Operational Muff Build DocsDrill template

From the vendor

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The Op-Amp Muff is another classic variation on the Muff that gets overlooked often. For those who don’t really go nuts for the 4 transistor type Muff, the Operational Muff is often much more attractive. It’s also easy to build, and there’s a lot of great, familiar sounds to be had with this circuit. Try it out if you’ve never gotten along with other Muffs but keep wishing you did.

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Schematic

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

Parts list 39 rows

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RefValueNormalizedTypeNotes
Resistors 18
R11M1M
R10470K470k
R256K56k
R115.6K5.6k
R3330K330k
R121.2K1.2k
R410K10k
R13100K100k
R547K47k
R14220K220k
R6560K560k
R15220K220k
R762K62k
R16820K820k
R847R47
R171M1M
R98.2K8.2k
R184.7K4.7k
Capacitors 9
C1150nF150n
C71uF1u
C24.7nF4.7n
C8100nF100n
C310nF10n
C9120nF120n
C111uF1u
C6150pF150p
C12220nF220n
Diodes 7
D11N9141N914
D21N9141N914
D31N9141N914
D41N9141N914
D51N9141N914
D61N9141N914
D71N40011N4001
ICs 2
IC1JRC4558JRC4558
IC2LM741LM741
Potentiometers 3
SUSTAINB10KB10kPotentiometer
TONEB10KB10kPotentiometer
LEVELB50KB50kPotentiometer

Other boards based on the EHX Op-Amp Big Muff