This is the single most important part of building your pedal. Please read this carefully to make sure you understand it completely. The first things to understand is that the transistor has three leads: the emitter, the base, and the collector. On the Mullard OC75, the base will be the very middle lead. The collector will be denoted by a red paint dot. The emitter will be the only lead that is left. In the build your own clone fuzz wiring diagram, two transistors are used. The base of transistor 1 is labeled B1. The base of transistor 2 is labeled B2. The collector of transistor 1 is labeled C1. The collector of transistor 2 is labeled C2. The emitter of transistor 1 is labeled E1, and the emitter of transistor 2 is labeled E2. It does not matter what transisor you use for transistor 1 or transistor 2. Both transistors are gain matched, so it makes no difference which transistor comes first. On the BC109c, the 3 lead wires will be in a triangular formation that is offset to one side. The Emitter will be denoted by a metal tab. The Base will be in the center. The collector will be the the lead that is across from the emitter. |
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Take note that there are NO drawings on the wiring diagram to show you where the transistors go. There are only drawings for the capacitors and resistors. The diagram only shows you where to solder the emitter, base, and collector of each transistor. So for example, you can see by looking at the diagram above that the base of transistor 1 is also connected to the 100K resistor and the negative end of the 2.2uF capacitor. Or another example would be the collector of transistor 1, the base of transistor 2, and the 33K resistor are all connected at the same joint. |
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For kits that use TO-39 (black plastic package) transistors and JFETS, simple turn your transistor so that it matches the picture on your circuit board layout sticker. |
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