PedalPCB Son of Ben Preamp Quick Start Manual Download Page 3

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Son of Ben Preamp

Son of Ben Preamp

Additional Information

Capacitor C10 was only populated in the first 100 original units. Current production units
omit this capacitor.

Capacitor C10 (Optional)

The original

B2M Single-Ganged

potentiometer used for the Bass control isn’t a common value and

can be difficult to source. Alternatively a

B1M Dual-Ganged

potentiometer can be used.

The Son of Ben Preamp PCB layout is designed to accommodate either part.

Bass Potentiometer

B2M Single-Ganged

B1M Dual-Ganged

When using a

Dual-Ganged B1M

potentiometer the solder pads between
lugs 2 and 3 of the Bass potentiometer
should be left open.

When using a

Single-Ganged B2M

potentiometer the solder pads between
lugs 2 and 3 of the Bass potentiometer
should be bridged with solder.

The potentiometer should be installed
into the bottom row of pads.

Summary of Contents for Son of Ben Preamp

Page 1: ...1 All trademarks and registered trademarks are the property of their respective owners The company product and service names used in this web site are for identification purposes only Use of these names logos and brands does not imply endorsement Volume Drive Treble Bass CONTROLS AND FEATURES ...

Page 2: ...7 2 x 2 5mm C7 22n Film capacitor 7 2 x 2 5mm C8 22n Film capacitor 7 2 x 2 5mm C9 2n2 Film capacitor 7 2 x 2 5mm C10 10u Electrolytic capacitor 5mm Optional see Page 3 C100 100u Electrolytic capacitor 5mm C101 100n Film capacitor 7 2 x 2 5mm D100 1N5817 Schottky diode DO 41 Q1 J201 JFET transistor N channel Alternate MMBFJ201 SMD Q2 J201 JFET transistor N channel Alternate MMBFJ201 SMD Q3 J201 JF...

Page 3: ...e difficult to source Alternatively a B1M Dual Ganged potentiometer can be used The Son of Ben Preamp PCB layout is designed to accommodate either part Bass Potentiometer B2M Single Ganged B1M Dual Ganged When using a Dual Ganged B1M potentiometer the solder pads between lugs 2 and 3 of the Bass potentiometer should be left open When using a Single Ganged B2M potentiometer the solder pads between ...

Page 4: ...Copyright 2020 PedalPCB com Page 4 of 6 Son of Ben Preamp Son of Ben Preamp Schematic Diagram Adjust TRIM1 to 2KΩ Adjust TRIM2 for 4 0V on Drain of Q2 Adjust TRIM3 for 4 0V on Drain of Q3 ...

Page 5: ...Copyright 2020 PedalPCB com Page 5 of 6 Son of Ben Preamp Son of Ben Preamp Wiring Diagram ...

Page 6: ...NTIO M E T E R P O T E NTIO M E T E R P O T E NTIO M E T E R L E D D C J A C K I N P U T J A C K O U T P U T J A C K Copyright 2020 PedalPCB com Page 6 of 6 Son of Ben Preamp Son of Ben Preamp Drill Template 125B Enclosure Treble Bass Volume Drive ...

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