Pre-Wire The Printed Circuit Boards - Raleigh Audio Standard Extreme RAKK dac Mark III Assembly Manual

Pre­wire the printed circuit boards
In the following steps, the wires should be inserted into the solder side of the board. "Preparing a
wire" means to strip ⅛" of insulation from both ends of the wire and tin the ends.
Because each wire has a "from" end and "to" end, and only one end is pre-wired, some pads are
not wired in this section. A signal line or a function will likely have the same name on the
"from" end as it does on the "to" end, therefore don't just go by the name when you install the
wire. Rather, check that you are installing it on the proper board.
Basically there are two ways to make a twisted pair or a multi-wire cable. The quick and easy
way is to use an electric drill. So if you have a variable speed drill, all you have to do is to put
the wires together in the drill chuck and turn on the drill. It might take a little practice to get the
tension and speed right but once you get the knack, it is quick and easy to do. If you don't have a
drill handy, the old-fashioned way of manually twisting the wires works fine. I have described
how I do it here. To make a multi-wire cable, first make a twisted pair and then wrap a third
wire around the twisted pair following the lay of one of the wires. Then stretch this new wire like
you did the others. Follow with a fourth and fifth wire as needed.
About 5% shrinkage occurs when making a twisted pair. So for example, if you wanted a 10"
long twisted pair, you would make it from two 10½" wires. It would be better to err a little on the
long side because you can always trim the length when you install the twisted pair.
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