Lithium Grim OmniRat Building Instructions Download | Manualshive

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OmniRat

Building instructions

v1.0

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Summary of Contents for OmniRat

Page 1: ...OmniRat Building instructions v1 0 ...

Page 2: ...ion or endorsement is implied 2 Table of contents PCB layout 3 Components 4 Configurations 4 Build sequence 5 Off board wiring 6 Potentiometers 6 Diode Switch 6 Modifications 7 OpAmp 7 Drill instructions 8 Troubleshooting 8 Schematic 9 Read this entire manual thoroughly before you start building the effect There are some available options and you should choose which one you want to incorporate bef...

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 49 5 mm x 38 mm 1 95 inch x 1 50 inch ...

Page 4: ... 1 metal film C11 1u Electrolytic 25V R11 1 metal film C12 100u Electrolytic 25V R12 1 metal film C13 10n MKT R13 100k 1 metal film D1 R14 100k 1 metal film D2 P1 Distortion D3 P2 A100k Filter Tone D4 P3 A100k Volume D5 1N4001 Q1 2N5458 IC1 VR1 10k Bourns 3386 Optional diode switch SW1 SPDT On On MKT can also be FKS SMF or even greenies Configurations Early Big Box RAT RAT Chinese RAT2 RAT2 Turbo ...

Page 5: ...you can create a jumper using a spare piece of lead from a resistor or diode If you want to experiment with another transistor for Q1 then you could socket it instead of soldering it to the board You ll need a some 20 SIL sockets break off the 3 pin socket and solder it to the board Now is the time to solder this socket on the PCB as well as the socket for the IC Place the transistors and IC once ...

Page 6: ...ith solder lugs like in the picture above Diode Switch The wiring for the switch is the same as for potentiometers marking pin 1 with a rectangle pad There is no wrong way to wire it as long as the pad of pin 2 is connected to the middle lug of the SPDT switch The optional diode switch SW1 enables you to switch between 2 sets of diodes You could choose to equip D1 and D2 with the correct set of di...

Page 7: ...onnections go to the sleeve of the input jack It requires very good conductivity between the input jack output jack and the enclosure to work correct If you do not have good conductivity please connect a wire between the input jack sleeve and the output jack sleeve Modifications OpAmp It all started with the LM308N Opamp Through the years as these got obsolete it changed to the OP07 Nowadays the L...

Page 8: ...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 when an effect is sputtering rumbling or motorboating Check if you used the correct values of the components For resistors you can look ...

Page 9: ...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 9 Schematic ...

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