Timmy

Components

Parts
C1 47nF R1 2M2 D1-D6 1N4148
C2 100pF R2 510K D7 1N4001
C3 39nF R3 3K3
C4 1uF Film or Ceramic R4 3K3 IC1 JRC4558
C5 10nF R5 1K5
C6 100pF R6 3K3 DRIVE 1M Log
C7 47uF Electrolytic R7 3K3 BASS & TREB 50K Log
C8 47uF Electrolytic R8 8K2 VOL 10K Log
R9 10K
CLIP 2 Way DIP Switch

Where capacitor types aren't specified you can use film or monolithic ceramic/MLCC.

Build Notes

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.

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.