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Enclosure not stated · 3 knobs

Revolution Deux

Mad Professor Blueberry Bass Overdrive

Based on the Mad Professor Blueberry Bass Overdrive· 4 other boards clone it

Category
Bass
Controls
Volume · Drive · Nature
Price
see vendor
Tags
freestompboxes.org trace
Read the post at Revolution Deux Schematic imagefreestompboxes.org thread

From the vendor

The Mad Professor Blueberry Bass Overdrive, which the post says is based on the BJF Honey Bee circuit. A BF244A JFET input stage feeds a CA3130 op-amp with LED clipping in its feedback loop and a Drive pot, then a passive filter with a diode pair, and a second BF244A output stage. The Nature control blends signal from the output stage's source back into the op-amp's feedback network.

Schematic

The schematic is in the post. Open it at Revolution Deux. No KiCad fragment has been drawn for this circuit yet.

Parts list 54 rows

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Check before you build · 1 value the reader of this schematic was not sure of
  • R4 (14K7) and R21 (2K6) are printed in a different color from the other values on the trace, which may mark values changed or uncertain in version 1.5.
RefValueNormalizedTypeNotes
Resistors 24
R11M1Mread from the schematic by eye
R214.7K14.7kread from the schematic by eye
R31M1Mread from the schematic by eye
R414.7K14.7kmarked in a different color; read from the schematic by eye
R510K10kread from the schematic by eye
R630K30kread from the schematic by eye
R714.7K14.7kread from the schematic by eye
R92K2kread from the schematic by eye
R101K1kread from the schematic by eye
R111.5K1.5kread from the schematic by eye
R121K1kread from the schematic by eye
R1327K27kread from the schematic by eye
R1410K10kread from the schematic by eye
R15147K147kread from the schematic by eye
R16360K360kread from the schematic by eye
R171M1Mread from the schematic by eye
R1847K47kread from the schematic by eye
R1947K47kread from the schematic by eye
R205.6K5.6kread from the schematic by eye
R212.6K2.6kmarked in a different color; read from the schematic by eye
R224747read from the schematic by eye
R231K1kLED resistor; read from the schematic by eye
R2410M10Mread from the schematic by eye
R2510M10Mread from the schematic by eye
Capacitors 17
C147n47nread from the schematic by eye
C247p47pread from the schematic by eye
C34.7u4.7uelectrolytic; read from the schematic by eye
C4470p470pread from the schematic by eye
C547n47nread from the schematic by eye
C6100p100pread from the schematic by eye
C7220n220nread from the schematic by eye
C810u10uelectrolytic; read from the schematic by eye
C9220n220nread from the schematic by eye
C101u1uelectrolytic; read from the schematic by eye
C1122n22nread from the schematic by eye
C124.7n4.7nread from the schematic by eye
C1322n22nread from the schematic by eye
C1447n47nread from the schematic by eye
C1522u22uelectrolytic; read from the schematic by eye
C16100u100uelectrolytic; read from the schematic by eye
C171u1uelectrolytic; read from the schematic by eye
Diodes 4
D11N40071N4007read from the schematic by eye
D21N40071N4007read from the schematic by eye
D31N40071N4007polarity protection; read from the schematic by eye
D45.1V5V1zener, LED circuit; read from the schematic by eye
Transistors 2
T1BF244ABF244AJFET; read from the schematic by eye
T2BF244ABF244AJFET; read from the schematic by eye
ICs 1
IC1CA3130EZCA3130EZread from the schematic by eye
Potentiometers 3
VolumeB50KB50kPotentiometerread from the schematic by eye
DriveA1MA1MPotentiometerread from the schematic by eye
NatureA50KA50kPotentiometerread from the schematic by eye
LEDs 3
LED1LEDLEDclipping; read from the schematic by eye
LED2LEDLEDclipping; read from the schematic by eye
LED3LEDLEDindicator; read from the schematic by eye

Other boards based on the Mad Professor Blueberry Bass Overdrive