Oakley 5U Modular Series Builder's Manual
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- Builder's manual (33 pages) ,
- User manual (11 pages) ,
- Builder's manual (14 pages)
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Summary of Contents for Oakley 5U Modular Series
- Page 1 Oakley Sound Systems 5U Oakley Modular Series Slim VCO A SVCO PCB Issue 1 & 1.1 Builder's Guide V1.1.2 Tony Allgood B.Eng PGCE Oakley Sound Systems CARLISLE United Kingdom...
- Page 2 This is the Project Builder's Guide for the issues 1 and 1.1 Slim Voltage Controlled Oscillator variant A (SVCO-A) 5U module from Oakley Sound. This document contains a basic introduction to the board, a full parts list for the components needed to populate the board or boards, and a list of the various interconnections.
- Page 3 The Issue 1 SVCO PCB This is the prototype issue 1 Oakley SVCO-A module behind a natural finish 1U wide Schaeffer panel. Note the use of the optional Sock6 socket board to facilitate the wiring up of the six sockets. Ignore the black blanking plug to the left of the shape pot.
- Page 4 SVCO-A issue 1 and 1.1 Parts List For general information regarding where to get parts and suggested part numbers please see our useful Parts Guide at the project web page or http://www.oakleysound.com/parts.pdf. Note that this is the parts list for the SVCO-A and not the SVCO-B. The B version has its own Builder's Guide and this should be used if you are building the B version.
- Page 5 150K 220K 300K 680K 910K R27, R33, R45 Oakley/MOTM systems: 120K Synthesizers.com systems: 180K 1K 1% KRL temp co PTC (mounted on top and in contact with U6) Capacitors 100nF axial ceramic C16, C4, C6, C1, C8, C7, C5, C18, C3, C11, C19, C9, C17, C2 4p7 C0G 2.5mm ceramic...
- Page 6 – for connecting to sockets If not connecting to the Oakley Buss then you will also need a 0.1” jumper to short out pins 1 and 2 on the BUSS header. If you are going to be using the Oakley Buss you will need the...
- Page 7 3-way KK/MTA housings for your connecting cable. See section on the Oakley Buss in the User Manual for the SVCO. Other Parts Required Switchcraft 112APC 1/4” sockets Six off mounted either on the Sock6 board or on panel One 27mm knobs and three 20mm knobs.
- Page 8 A close up of the VCO core in the SVCO. Note the positioning of the positive temperature coefficient (PTC) resistor. The PTC straddles U6 and a small amount of thermal paste can be used to keep them both at the same temperature. Note also C14.
- Page 9 Connections Power connections – MOTM and Oakley The PSU power socket is 0.156” Molex/MTA 4-way header. Friction lock types are recommended. This system is compatible with MOTM systems. Power Pin number +15V Module GND Earth/PAN -15V Pin 1 on the I/O header has been provided to allow the ground tags of the jack sockets to be connected to the powers supply ground without using the module’s 0V supply.
- Page 10 Building the SVCO-A module using the Sock6 board This is the simplest way of connecting all the sockets to the main board. The Sock6 board should be populated in the way described in our construction guide found on the project webpage.
- Page 11 Hand wiring the sockets If you have bought Switchcraft 112A sockets you will see that they have three connections. One is the earth or ground tag. One is the signal tag which will be connected to the tip of the jack plug when it is inserted.
- Page 12 Wiring the Switch The SVCO-A panel design features a single on-off-on switch mounted just below the tune pot. All three lugs on the switch need to be connected to the SVCO PCB. Depending on which issue PCB you have the method of wiring the switch will be different. Issue 1 PCBs only: Put the module down on your bench as indicated in the picture above.
- Page 13 Issue 1.1 PCBs only: You should wire the switch as you would other Oakley modules. I typically use solid core wire rather than insulated multi-strand wire. This keeps the connection firmly in place and very neat. I normally bend the wire at one end into a hook and place the straight end into the PCB pad's hole.
- Page 14 Testing the SVCO-A Apply power to the unit making sure you are applying the power correctly. Check that no device is running hot. Any sign of smoke or strange smells turn off the power immediately and recheck the polarity of the power supply, the two transistors Q4 and Q5, the direction of the ICs in their sockets and the polarity of the electrolytic capacitors.
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Page 15: Final Comments
Oakley modules. If you can't get your project to work, then Oakley Sound Systems are able to offer a 'get you working' service. If you wish to take up this service please e-mail me, Tony Allgood, at my contact e-mail address found on the website.
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