Page 4
What Is It? The PastyFace is an openended, threeknob Tonebender fuzz. With it you can build several variations of this classic effect. Controls TONE: This control mixes between two low pass type filters. FUZZ: The overall fuzz effect controlled by a variable resistor in the signal path. VOL: The output level. BIAS: This trimmer allows you to tweak the output of Q3. Notes A matched Tonebender set of germanium transistors is recommended. These can be purchased from Smallbear or similar suppliers. Smallbear usually supplies either a list or set of resistors that correctly bias the transistors in a standard Tonbender circuit. Feel free to use the values supplied instead of the ones listed in the BOM of the PastyFace, if you prefer. The default setup for the PastyFace is POSITIVE GROUND. If you are using PNP germaniums, make sure to use a positive ground wiring, i.e. connect the black lead of the battery to the round 9v pad, and the red battery lead to the square ground pad. Alternatively, you can use the madbeanpedals Road Rage to power PNP fuzz using the standard center tip negative power supply. Consult the documentation for the Road Rage on the Projects Page for more info. 0. You 2can also build an NPN negative ground Tonebender with the PastyFace. If you are using NPN transistors, such as the BC109 or 2n3904, be sure to flip the direction of the electrolytic caps, flip D2, AND reverse the battery leads for a negative ground wiring. You can also omit D1 from any NPN Tonebender. The PastyFace allows you to use either axial or radial film caps for C1, C4, C5 and C6. Radial spacing is 5mm. Axial spacing is 18mm. The BIAS trimmer allows you to tweak the output of Q3. Simply adjust to taste using the minimum and maximum settings on the FUZZ control as your guide. Drill markers for PCB mounted pots (actual size)
Page 5
Single Sided Layout (This layout allows you to build the “Soulbender” or similar version – component numbering is slightly different than the schematic on pg.2) 2.22”W x 2.11”...
Need help?
Do you have a question about the Pastyface and is the answer not in the manual?
Questions and answers