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Related Manuals for Lithium Grim OmniWah
Summary of Contents for Lithium Grim OmniWah
- Page 1 OmniWah Building instructions V2.0...
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Page 2: Table Of Contents
OmniWah v2.0 Table of contents PCB layout ............................... 3 Build options ............................4 Vintage Wahs ............................4 Modern signature Wahs ........................4 Components ............................5 Inductor ............................... 5 Wah Pot ............................... 5 Resistors and capacitors ........................6 Configuration note ..........................7 Modifications ............................ -
Page 3: Pcb Layout
OmniWah v2.0 PCB layout Dimensions: 74 mm x 75 mm 2.91 inch x 2.95 inch Manufacturers and product names 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... -
Page 4: Build Options
OmniWah v2.0 Build options This PCB can be used to mimic a wide range of vintage to modern wahs. Vintage Wahs Thomas: Organ CryBaby Vox: Grey Wah, v847, Clyde McCoy FullTone: Clyde Wah Colorsound: Inductor Wah ... -
Page 5: Components
OmniWah v2.0 Components Since the OmniWah can be used to build so many different types of wahs, we split off the components section into a separate document with all possible configurations. My advice: Capacitors with values < 1nF should be MLCC, values of 1nF – 1µF should be SMF/MKT/MKS and all values >... -
Page 6: Resistors And Capacitors
OmniWah v2.0 (source: Ebay/Phillip Perkmann) 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. -
Page 7: Configuration Note
OmniWah v2.0 Configuration note P1-P3, P5 and P6 are arranged as onboard trimpots on the PCB. This is done because most of them are set and forget. However, you could choose to make them external by wiring a chassis pot to them. For this we added the pinout next to the trimpot pads so you know To Footswitch what pad to connect to which pin on the pot. -
Page 8: Mechanical Sweeprange Mod
OmniWah v2.0 Mechanical Sweeprange mod If you are using an old crybaby shell, then you might want to remove the rubber underneath the heel of the wah plate. Also you might want to cut about half of the front 2 rubbers off. This way the sweeprange of the wah will increase dramatically. -
Page 9: Build Sequence
OmniWah v2.0 Build sequence Errata There is a link missing between the DC In jack and ground. You can add it very simple by soldering a wire from the outermost pad of the DC jack to any ground pad you can find. I advise you to do this after you soldered all the parts to the board. - Page 10 OmniWah v2.0 Note: Orientation of the transistors vary for each different type you use. For this reason I marked the pinout on the board for your convenience. I also added a graphic of the flat and rounded side of the transistor.
- Page 11 OmniWah v2.0 Everything should fit perfectly. The only thing you should watch extra carefully is the placement of the PCB mounted DC jack. Before you solder it, take a good look if it is perfectly aligned with the hole in the enclosure. There is a possibility that the vertical alignment is out of sync. You can do a couple of things.
- Page 12 OmniWah v2.0 Now look at the side and check the DC input. As you can see in the picture below, the horizontal alignment is good, but it might be a bit too low. You can either use a plastic washer under the PCB or you can solder the DC jack with a small gap between the PCB and the jack.
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Page 13: Off Board Wiring
OmniWah v2.0 Off board wiring The version 2 of the OmniWah has been designed to be used in a standard Crybaby enclosure with either onboard soldered jacks or separate jacks (like the neutrik/rean type of input jacks). There are also 4 holes added for PCB stands in case you want to use a custom enclosure (1590BB). -
Page 14: Footswitch With External Input And Output
OmniWah v2.0 Footswitch with external input and output Sleeve Ring Sleeve R Led 1k (only for BBE Ben Wah) As the onboard DC jack is not installed, you will need to connect 2 DC pins on the board like this: The sleeve on the output jack is not connected on purpose. -
Page 15: Switch Installation
OmniWah v2.0 Switch installation I usually put switches to the side of the crybaby enclosure by drilling a hole, until Ulrich pointed me out that you could use a short shaft switch just underneath the rocker of your Wah. This way you will prevent breaking off the switch when you accidentally slip off or miss. -
Page 16: Wahpot Calibration
OmniWah v2.0 Wahpot calibration If you feel that your wah is not changing over the full sweep, then you will need to calibrate your wahpot. You can do this by loosening the tension clutch (the white plastic thingy pushing against the rack gear) until you can push it aside enabling you to pull back the rack gear from the wahpot. - Page 17 OmniWah v2.0 Color coding headers Dunlop Crybaby Pre 1990 Orange : DC Jack + Black : DC Jack Ground Brown : Tip Input Jack (To PCB In) Green : Switch In (shorts with Brown) Yellow : Wah Pot lug 2...
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Page 18: Troubleshooting
OmniWah v2.0 Troubleshooting All PCB’s have been 100% factory e-tested and out of every batch I receive I build an effect to double check, so there should not be a connection problem on the PCB itself. The board is not working (at all), what now? ... -
Page 19: Schematic
OmniWah v2.0 Schematic Manufacturers and product names 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...