Lithium Grim OmniMuff Building Instructions Download Page 1 | Manualshive

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OmniMuff

Building instructions

V1.0

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Summary of Contents for OmniMuff

Page 1: ...OmniMuff Building instructions V1 0 ...

Page 2: ...nt is implied 2 Table of contents PCB layout 3 Build options 4 Components 5 Transistors 5 Resistors and capacitors 5 Build sequence 6 Drill template 7 Off board wiring 8 Modifications 9 Troubleshooting 9 Schematic 10 Read this entire manual thoroughly before you start building the effect There are some available options and a lot of different configurations so you should choose which one you want ...

Page 3: ...or 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 75 mm x 45 5 mm 2 95 inch x 1 79 inch ...

Page 4: ... P3 on the back of the PCB but you are free to use more traditional solder lug chassis potentiometers Rectangular pad on the PCB marks pin3 and that corresponds with this numbering of the solder lugs VR1 is arranged as onboard trimpot on the PCB This is done because for most people it is set and forget However you could choose to make it external by wiring a chassis pot For this I added the pinout...

Page 5: ...etween 160 and 200 Resistors and capacitors Ok this is going to get me some hate mail I found no real tonal difference using vintage carbon composition resistors or modern metal film resistors I am NOT a certified electrical engineer so this is based on simply experimenting Ditto goes for the capacitors I used mostly WIMA SMF and electrolytic capacitors from Panasonic and they sound great everywhe...

Page 6: ... each different type you use For this reason I marked the pinout on the board for your convenience I also added a graphic line to indicate the flat side of the transistor when using a TO 92 This is based on the 2N5088 transistors Other types possibly need to be rotated Always consult the datasheet of the transistor and orient accordingly Now continue by soldering the small capacitors MLCC then the...

Page 7: ...ied 7 Drill template 29 6 mm 29 6 mm Volume Tone Sustain Footswitch 15mm After you drilled the enclosure you can insert the potentiometers and attach them firmly to the enclosure Now insert the PCB on the pots and if all fits ok you can solder the potentiometers to the PCB If you want to incorporate SW1 and SW2 as an external switch you can place them wherever you want Just measure before you dril...

Page 8: ...lmost all LEDs 9V 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 output together If you test the unit outside of an enclosure you need to connect the output sleeve to ground Note that there are two 9V pads on the board You may only use 1 at a time else you...

Page 9: ...em on the PCB itself The board is not working at all what now Check if your 9V is plugged in correctly and or soldered correctly on the board Pay special attention to the polarity Check that 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 ...

Page 10: ...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 10 Schematic ...

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