NP Electronics Fuzz Face Manuals

Fuzz Face Original Version (PNP) Components To use a PNP Fuzz Face with a normal 9V power supply, you need to include the power inverter section which is C1, C8, C9, D1 and IC1 which is generates the -9V required. Unless you know what you're doing and have a positive ground PSU, you should use all these components, otherwise omit them and solder a jumper between J1 and J2. (Do NOT connect the jumper if using the power inverter or you will get a short circuit). Adjust Q2 BIAS until you get the sound you like. You can use a multimeter to measure the voltage between the collector on Q2 and GND and it should be around 4.5V NPN Version Components C4 and C5 cut out some high frequency noise, you can use different value ceramic capacitors here and higher ones will cut out more of the high end but might affect your tone. 100pF is considered a good value to start with. Solder a jumper between J1 and J2 Adjust Q2 BIAS until you get the sound you like. You can use a multimeter to measure the voltage between the collector on Q2 and GND and it should be around 4.5V CHECK ELECTROLYTIC CAPACITORS! If you are building the NPN version, the polarity of C6 and C7 need to be reversed from what is printed on the board, so put the negative leg in the hole with a + C1 10uF Electrolytic R1 470 OHM FUZZ 1K Linear C3 10nF R2 33K VOLUME 500K Log C4 Empty R3 100K C5 Empty R4 Jumper Q1, Q2 PNP Germanium Transistor C6 22uF Electrolytic C7 2u2 Electrolytic Q1 BIAS Connect pins 2 and 3 D1 1N4148 C8 10uF Electrolytic Q2 BIAS 20K Trimmer D2 1N4001 C9 100uF Electrolytic IC1 7660S C1 Empty R1 470 OHM FUZZ 1K Linear C3 10nF R2 33K VOLUME 500K Log C4 47pF – 470pF R3 100K C5 47pF – 470pF R4 Jumper Q1, Q2 BC108 (or experiment with NPN transistors) C6 22uF Electrolytic C7 2u2 Electrolytic Q1 BIAS Connect pins 2 and 3 D1 Empty C8 Empty Q2 BIAS 20K Trimmer D2 1N4001 C9 Empty J1 + J2 Jumper IC1 Empty