Oakley 3U User Manual - page 6
The Overdrive PCB
The PCB has double sided copper traces and features though hole plating. The finish is Pb-
free and the board is made from glass fibre for strength. The size of the board is 71mm (deep)
and 83mm (high).
I have provided space for the three main control pots on the PCB. If you use the specified
Alpha 16mm pots and matching brackets, the PCB can be held firmly to the panel without
any need for additional mounting procedures. The pot spacing is our standard for 3U
modules: 21mm.
The design requires plus and minus 12V or 15V supplies. The power supply should be
adequately regulated. The current consumption is about 15mA for each rail. Power is routed
onto the PCB by a four way 0.156” Molex/MTA type connector or 2 x 5-way 0.1” header.
The former is normally used by Frac based systems, as well as our own 5U MOTM
compatibles. The latter is found on most Euro modular systems. The four pins on the
Molex/MTA are +15V, ground, earth/panel ground, -15V. The earth connection allows you to
connect the metal front panel to the power supply’s ground without it sharing the modules’
ground line. More about this later.
As is common for our 3U series of modules the PCB has no mounting holes.
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