Tim Instructions

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Build Difficulty: Easy

Components

C147nF
C2100pF
C339nF
C41uF Film/Monolithic
C510nF
C61uF Film/Monolithic
C747uF Electrolytic
C847uF Electrolytic
R12M2
R2510K
R33K3
R43K3
R51K5
R63K3
R73K3
R88K2
R910K
D71N4001
IC1LM4558
VOL10K Log
BASS50K Log
CLIP2 Way DIP Switch
D1-D61N4148
DRIVE1M Log
TREBLE50K Log

Build Notes

Where capacitor type isn't specified, you can use monolithic ceramic or film type.

The clipping switch lets you add or remove additional diodes to the circuit for more/asymmetrical clipping with the DIP switch. If you want to permanently add them into the circuit then solder a jumper wire between the switch contacts as shown below. Alternatively if you don't want this option then you can leave out the DIP switch, D5 and D6.

dipjumper

Some versions of this circuit have a connection between the diodes, you have the option of soldering a jumper wire between J1 and J2 to do this or leave it out if you don't want it (it sounds just fine without it in my opinion).

Board Connections

The PCB connections are labelled as the following: I - Input, O - Output, V - 9V DC in, G - Ground Potentiometers are connected from pin 1 to the square pad on the PCB.

This board was designed so you can use right-angle board mount potentiometers on it if desired, otherwise you will need to solder wired from the pads to the correct pin/lug.

Jack sleeves and DC centre pin should be connected to ground. V, LED + with a 2K2 resistor in series should be connected to the positive pin of the DC connector.

PCB board connections diagram