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Fuzzy Joe

Building instructions

v1.1

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Содержание Fuzzy Joe

Страница 1: ...Fuzzy Joe Building instructions v1 1 ...

Страница 2: ...tents PCB layout 3 Components 4 Power section 5 Battery only 5 Switchable Voltage Inverter 5 Build sequence 6 Off board wiring 7 Potentiometers 7 Battery only wiring 7 Voltage Inverter wiring 8 Biasing 9 Fixed resistors 9 Transistors and resistors 9 Troubleshooting 10 Schematic 11 Read this entire manual thoroughly before you start building the effect There are some available options and you shoul...

Страница 3: ...for circuit identification and where applicable their trademarks are the property of their respective owners who are in no way associated or affiliated with the author No cooperation or endorsement is implied 3 PCB layout Dimensions 44 mm x 38 6 mm 1 73 inch x 1 52 inch ...

Страница 4: ...maybe hard to find or expensive You could just get a A500k and ask your vendor to get one of around 470k as most pots are rated 10 or more Note that the original uses 400V axial electrolytes for C5 and C7 capacitors They will fit in an upright position but I advise you use radial electrolyte capacitors and choose the good ones like Elna Fine Gold Panasonics etc that will fit C6 is originally a foi...

Страница 5: ...g battery by using a sag pot VR1 You can use this as a set and forget by installing an internal 6mm trim pot or as an extra external 16mm sag pot so you can easily adjust the sag during play With the current R7 at 4k7 you can turn down the voltage to approximately 3V If you want to go down to 0V you can just solder a jumper instead of a resistor in R7 If you want a higher minimum voltage then you ...

Страница 6: ... by soldering the resistors and jumpers if needed Next come the diodes IC socket If needed you can create a jumper using a spare piece of lead from a resistor or diode If you want to experiment with other transistors then you could socket them instead of soldering them to the board You ll need a some 20 SIL sockets break off the sockets and solder them to the board Now is the time to solder these ...

Страница 7: ...e correct pin numbering of the pots Alpha 16mm style Solder the wires accordingly and it is always a good idea to twist the wires together to create some extra shielding against external noise VR1 is labeled on the PCB with the correct pin numbers so you can use an external pot as mentioned in the power section chapter You can break off the pin I marked with the yellow circle with a small pair of ...

Страница 8: ... of LED you use but 4k7 is safe enough for almost all LEDs for 9V It is now time to place your transistors and IC in the sockets if needed Connect everything build it in your enclosure and enjoy your effect The sleeve on the output jack is not connected on purpose Make sure the output jack is in good electronic contact with the enclosure else you can try and connect the sleeves of the input and ou...

Страница 9: ...ore to 12 o clock and test it with different fuzz levels by turning the fuzz pot Stop when you found your sweet spot Remember that germanium transistors are very sensitive to temperature changes and will need to be re biased every now and again Fixed resistors If you have trouble biasing or just do not want it you can replace R3 with a 33k resistor and R5 with a 8k2 resistor and leave out VR2 and ...

Страница 10: ...you oriented the capacitors IC s transistors and diodes the right way SMF MKT and ceramic capacitors as well as resistors do not need to be oriented A likely sign of incorrect capacitors and or orientation is when an effect is sputtering rumbling or motorboating Check if you used the correct values of the components For resistors you can look here http www diyaudioandvideo com Electronics Color Do...

Страница 11: ...es are mentioned solely for circuit identification and where applicable their trademarks are the property of their respective owners who are in no way associated or affiliated with the author No cooperation or endorsement is implied 11 Schematic ...

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