Fuzz Face / Rangemaster (Eyelet Board)

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Many of the folks who work here are builders too, and we often have the occasion to put together interesting builds that we show off on our social media and elsewhere. When possible, we document the design and bill of materials so that these pedals can easily be built by any DIYers without going through the trouble of hunting down all the required parts. This dual pedal is a combination of the classic Dallas-Arbiter Fuzz Face and the Dallas Rangemaster (treble boost). Fuzz + treble boost is a classic combo seen in pedals such as the AnalogMan Sun Lion and the Hornby Skewes Shatterbox. This version has an added bias control knob for the Fuzz Face side, and an input cap selector switch for the Rangemaster side. It is built on our 2x12 pseudo-eyelet board. The original Rangemaster had a single control (besides on/off), and that was the volume pot. The input cap selector is an easy way to expand the Rangemaster’s versatility by adding a control that changes the cutoff frequency of the input high pass filter. If you’d like to read about how it works, see our tech article Rangemaster Modification / Variant: Input Capacitor Switch. Figure 1 is an eyelet board layout for the Fuzz Face / Rangemaster combo pedal. Note that the input capacitor switch can be removed by simply removing the connections to it and changing the yellow 1nF capacitor to ~5nF. The bias knob can be removed by replacing the 2.2KΩ resistor with an 8.2KΩ resistor (or a 10k+ trimpot for trimpot bias adjustment), and running a wire from the FF Q2 collector eyelet to the eyelet directly below it. The recommended wiring for the jacks and switches wires each section of the effect as if they were separate - the Fuzz Face section has its own footswitch and LED for engaging the effect as well as its own input and output jack, as does the Rangemaster section. However, the output jack of the Fuzz Face section and the input jack of the Rangemaster section both use a switched jack, with their switched contacts wired to each other. The result is that with nothing plugged into the Fuzz Face output jack or the Rangemaster input jack, the effects will be put in series with the Rangemaster after the Fuzz Face. This is the "default" way to use the pedal with a single input and output signal. The Fuzz Face output and Rangemaster input jacks (also marked "SEND" and "RETURN" in Figure 3) can be used to insert external effects between the two, to switch the order (Rangemaster before Fuzz Face), or to use the two effects separately. The input jack of the Fuzz Face section will disconnect battery when the plug is removed.